부산대학교 도서관

Dunne EM; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Gordon H; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland. hamish.gordon@cern.ch lecksc@ds.leeds.ac.uk.; Kürten A; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Almeida J; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland.; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Duplissy J; Helsinki Institute of Physics, FI-00014 Helsinki, Finland.; Williamson C; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Ortega IK; Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM), Université Lille 1, UMR 8523 CNRS, 59655 Villeneuve d'Ascq, France.; Pringle KJ; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Adamov A; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Baltensperger U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Barmet P; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Benduhn F; Institute for Advanced Sustainability Studies, Berliner Straße 130, D-14467 Potsdam, Germany.; Bianchi F; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Breitenlechner M; Institute of Ion Physics and Applied Physics, Leopold-Franzens University, Technikerstraße 25, 6020 Innsbruck, Austria.; Clarke A; Department of Oceanography, University of Hawaii, 1000 Pope Road, Honolulu, HI 96822, USA.; Curtius J; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Dommen J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Donahue NM; Center for Atmospheric Particle Studies, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Ehrhart S; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland.; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Flagan RC; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.; Franchin A; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Guida R; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland.; Hakala J; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Hansel A; Institute of Ion Physics and Applied Physics, Leopold-Franzens University, Technikerstraße 25, 6020 Innsbruck, Austria.; Ionicon, 6020 Innsbruck, Austria.; Heinritzi M; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Jokinen T; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Kangasluoma J; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Kirkby J; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland.; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Kulmala M; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Kupc A; Faculty of Physics, University of Vienna, Boltzmanngaße 5, 1090 Vienna, Austria.; Lawler MJ; University of Eastern Finland, Post Office Box 1627, 70211 Kuopio, Finland.; Lehtipalo K; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Makhmutov V; Lebedev Physical Institute, Solar and Cosmic Ray Research Laboratory, 119991 Moscow, Russia.; Mann G; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Mathot S; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland.; Merikanto J; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Miettinen P; University of Eastern Finland, Post Office Box 1627, 70211 Kuopio, Finland.; Nenes A; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA.; Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research and Technology, Hellas, 26504 Patras, Greece.; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, I. Metaxa & Vas. Pavlou, 15236 Palea Penteli, Greece.; Onnela A; European Organization for Nuclear Research (CERN), 1211 Geneva, Switzerland.; Rap A; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Reddington CL; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Riccobono F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Richards NA; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Rissanen MP; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Rondo L; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Sarnela N; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Schobesberger S; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Sengupta K; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Simon M; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Sipilä M; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Smith JN; University of Eastern Finland, Post Office Box 1627, 70211 Kuopio, Finland.; Stozkhov Y; Lebedev Physical Institute, Solar and Cosmic Ray Research Laboratory, 119991 Moscow, Russia.; Tomé A; CENTRA-SIM, University of Lisbon and University of Beira Interior, 1749-016 Lisbon, Portugal.; Tröstl J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Wagner PE; Faculty of Physics, University of Vienna, Boltzmanngaße 5, 1090 Vienna, Austria.; Wimmer D; Goethe-University Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Winkler PM; Faculty of Physics, University of Vienna, Boltzmanngaße 5, 1090 Vienna, Austria.; Worsnop DR; Department of Physics, University of Helsinki, Post Office Box 64, FI-00014 Helsinki, Finland.; Aerodyne Research, Billerica, MA 01821, USA.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK. hamish.gordon@cern.ch lecksc@ds.leeds.ac.uk.

Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 0404511 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-9203 (Electronic) Linking ISSN: 00368075 NLM ISO Abbreviation: Science Subsets: PubMed not MEDLINE

Lehtipalo K; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Rondo L; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Kontkanen J; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Schobesberger S; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Jokinen T; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Sarnela N; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Kürten A; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Ehrhart S; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; CERN, 1211 Geneva, Switzerland.; Franchin A; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Nieminen T; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Riccobono F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Sipilä M; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Yli-Juuti T; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Duplissy J; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; CERN, 1211 Geneva, Switzerland.; Helsinki Institute of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Adamov A; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Ahlm L; Department of Environmental Science and Analytical Chemistry (ACES) &Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden.; Almeida J; CERN, 1211 Geneva, Switzerland.; SIM, University of Lisbon and University of Beira Interior, 1749-016 Lisbon, Portugal.; Amorim A; SIM, University of Lisbon and University of Beira Interior, 1749-016 Lisbon, Portugal.; Bianchi F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Institute for Atmospheric and Climate Science, ETH Zurich, 8092 Zurich, Switzerland.; Breitenlechner M; Institute for Ion Physics and Applied Physics, Technikerstraße 25, 6020 Innsbruck, Austria.; Dommen J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Downard AJ; Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard Pasadena, California 91125, USA.; Dunne EM; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Finnish Meteorological Institute, Atmospheric Research Centre of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Flagan RC; Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E. California Boulevard Pasadena, California 91125, USA.; Guida R; SIM, University of Lisbon and University of Beira Interior, 1749-016 Lisbon, Portugal.; Hakala J; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Hansel A; Institute for Ion Physics and Applied Physics, Technikerstraße 25, 6020 Innsbruck, Austria.; Ionicon Analytik GmbH, Eduard-Bodem-Gasse 3, 6020 Innsbruck, Austria.; Jud W; Institute for Ion Physics and Applied Physics, Technikerstraße 25, 6020 Innsbruck, Austria.; Kangasluoma J; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Kerminen VM; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Keskinen H; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Kim J; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Kirkby J; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Kupc A; University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Vienna, Austria.; Kupiainen-Määttä O; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Laaksonen A; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Finnish Meteorological Institute, PO Box 501, 00101 Helsinki, Finland.; Lawler MJ; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Department of Chemistry, University of California, Irvine, California, 92697 USA.; Leiminger M; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Mathot S; CERN, 1211 Geneva, Switzerland.; Olenius T; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Ortega IK; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Onnela A; CERN, 1211 Geneva, Switzerland.; Petäjä T; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Praplan A; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Rissanen MP; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Ruuskanen T; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Santos FD; SIM, University of Lisbon and University of Beira Interior, 1749-016 Lisbon, Portugal.; Schallhart S; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Schnitzhofer R; Institute for Ion Physics and Applied Physics, Technikerstraße 25, 6020 Innsbruck, Austria.; Simon M; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Smith JN; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Department of Chemistry, University of California, Irvine, California, 92697 USA.; Tröstl J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Tsagkogeorgas G; Leibniz Institute for Tropospheric Research, Permoserstrasse 15, 04318 Leipzig, Germany.; Tomé A; SIM, University of Lisbon and University of Beira Interior, 1749-016 Lisbon, Portugal.; Vaattovaara P; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Vehkamäki H; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Vrtala AE; University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Vienna, Austria.; Wagner PE; University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Vienna, Austria.; Williamson C; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Wimmer D; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Winkler PM; University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Vienna, Austria.; Virtanen A; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Donahue NM; Center for Atmospheric Particle Studies, Carnegie Mellon University, Doherty Hall 2116, Pittsburgh, Pennsylvania 15213, USA.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Baltensperger U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Riipinen I; Department of Environmental Science and Analytical Chemistry (ACES) &Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden.; Curtius J; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Worsnop DR; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Department of Applied Physics, University of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Finnish Meteorological Institute, Atmospheric Research Centre of Eastern Finland, PO Box 1627, 70211 Kuopio, Finland.; Aerodyne Research Inc., Billerica, Massachusetts 01821-3976, USA.; Kulmala M; Department of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, PO Box 64, 00014 Helsinki, Finland.

Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101528555 Publication Model: Electronic Cited Medium: Internet ISSN: 2041-1723 (Electronic) Linking ISSN: 20411723 NLM ISO Abbreviation: Nat Commun Subsets: PubMed not MEDLINE

Wilson TW; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.; Ladino LA; Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada.; Alpert PA; Institute for Terrestrial and Planetary Atmospheres, School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York 11794-5000, USA.; Breckels MN; School of Biological Sciences, University of Essex, Colchester CO4 3SQ, UK.; Brooks IM; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.; Browse J; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.; Burrows SM; Atmospheric Science and Global Change Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99354, USA.; Carslaw KS; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.; Huffman JA; Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, USA.; Judd C; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.; Kilthau WP; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York 11794-5000, USA.; Mason RH; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.; McFiggans G; School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK.; Miller LA; Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, British Columbia V8L 4B2, Canada.; Nájera JJ; School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK.; Polishchuk E; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.; Rae S; School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK.; Schiller CL; Air Quality Science Unit, Environment Canada, Vancouver, British Columbia V6C 3S5, Canada.; Si M; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.; Temprado JV; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.; Whale TF; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.; Wong JP; Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada.; Wurl O; Leibniz Institute for Baltic Sea Research Warnemünde, Department of Biological Oceanography, Seestraße 15, 18119 Rostock, Germany.; Yakobi-Hancock JD; Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada.; Abbatt JP; Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada.; Aller JY; School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York 11794-5000, USA.; Bertram AK; Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.; Knopf DA; Institute for Terrestrial and Planetary Atmospheres, School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, New York 11794-5000, USA.; Murray BJ; School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK.

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: MEDLINE

Lamkaddam H; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland. houssni.lamkaddam@psi.ch imad.el-haddad@psi.ch urs.baltensperger@psi.ch.; Dommen J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Ranjithkumar A; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Gordon H; Engineering Research Accelerator, Carnegie Mellon University, Pittsburgh 15213, USA.; Wehrle G; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Krechmer J; Aerodyne Research Inc., Billerica, MA 01821, USA.; Majluf F; Aerodyne Research Inc., Billerica, MA 01821, USA.; Salionov D; Bioenergy and Catalysis Laboratory, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Schmale J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.; School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.; Bjelić S; Bioenergy and Catalysis Laboratory, Paul Scherrer Institute, 5232 Villigen, Switzerland.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; El Haddad I; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland. houssni.lamkaddam@psi.ch imad.el-haddad@psi.ch urs.baltensperger@psi.ch.; Baltensperger U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland. houssni.lamkaddam@psi.ch imad.el-haddad@psi.ch urs.baltensperger@psi.ch.

Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 101653440 Publication Model: Electronic-Print Cited Medium: Internet ISSN: 2375-2548 (Electronic) Linking ISSN: 23752548 NLM ISO Abbreviation: Sci Adv Subsets: MEDLINE; PubMed not MEDLINE

McCoy IL; Atmospheric Sciences Department, University of Washington, Seattle, WA 98105; imccoy@uw.edu.; McCoy DT; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, LS2 9JT Leeds, United Kingdom.; Wood R; Atmospheric Sciences Department, University of Washington, Seattle, WA 98105.; Regayre L; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, LS2 9JT Leeds, United Kingdom.; Watson-Parris D; Department of Physics, University of Oxford, OX1 3PU Oxford, United Kingdom.; Grosvenor DP; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, LS2 9JT Leeds, United Kingdom.; National Center for Atmospheric Science, University of Leeds, LS2 9JT Leeds, United Kingdom.; Mulcahy JP; Met Office, Exeter EX1 3PB, United Kingdom.; Hu Y; Atmospheric Composition Branch, NASA Langley Research Center, Hampton, VA 23681.; Bender FA; Department of Meteorology, Stockholm University, SE-106 91 Stockholm, Sweden.; Bolin Centre for Climate Research, Stockholm University, SE-106 91 Stockholm, Sweden.; Field PR; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, LS2 9JT Leeds, United Kingdom.; Met Office, Exeter EX1 3PB, United Kingdom.; Carslaw KS; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, LS2 9JT Leeds, United Kingdom.; Gordon H; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, LS2 9JT Leeds, United Kingdom.; College of Engineering, Carnegie-Mellon University, Pittsburgh, PA 15213.

Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE; PubMed not MEDLINE

Riccobono F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland.; Schobesberger S; Department of Physics, University of Helsinki, Helsinki, Finland.; Scott CE; School of Earth and Environment, University of Leeds, Leeds, UK.; Dommen J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland.; Ortega IK; Department of Physics, University of Helsinki, Helsinki, Finland.; Rondo L; Institute for Atmospheric and Environmental Sciences, Goethe University of Frankfurt, Frankfurt am Main, Germany.; Almeida J; Institute for Atmospheric and Environmental Sciences, Goethe University of Frankfurt, Frankfurt am Main, Germany.; Amorim A; Laboratory for Systems, Instrumentation, and Modeling in Science and Technology for Space and the Environment (SIM), University of Lisbon and University of Beira Interior, Lisbon, Portugal.; Bianchi F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland.; Breitenlechner M; Ionicon Analytik GmbH and University of Innsbruck, Institute for Ion and Applied Physics, Innsbruck, Austria.; David A; CERN (European Organization for Nuclear Research), Geneva, Switzerland.; Downard A; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.; Dunne EM; School of Earth and Environment, University of Leeds, Leeds, UK.; Duplissy J; Department of Physics, University of Helsinki, Helsinki, Finland. Helsinki Institute of Physics, University of Helsinki, Helsinki, Finland.; Ehrhart S; Institute for Atmospheric and Environmental Sciences, Goethe University of Frankfurt, Frankfurt am Main, Germany.; Flagan RC; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.; Franchin A; Department of Physics, University of Helsinki, Helsinki, Finland.; Hansel A; Ionicon Analytik GmbH and University of Innsbruck, Institute for Ion and Applied Physics, Innsbruck, Austria.; Junninen H; Department of Physics, University of Helsinki, Helsinki, Finland.; Kajos M; Department of Physics, University of Helsinki, Helsinki, Finland.; Keskinen H; University of Eastern Finland, Kuopio, Finland.; Kupc A; Faculty of Physics, University of Vienna, Vienna, Austria.; Kürten A; Institute for Atmospheric and Environmental Sciences, Goethe University of Frankfurt, Frankfurt am Main, Germany.; Kvashin AN; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, Moscow, Russia.; Laaksonen A; University of Eastern Finland, Kuopio, Finland.; Lehtipalo K; Department of Physics, University of Helsinki, Helsinki, Finland.; Makhmutov V; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, Moscow, Russia.; Mathot S; CERN (European Organization for Nuclear Research), Geneva, Switzerland.; Nieminen T; Department of Physics, University of Helsinki, Helsinki, Finland. Helsinki Institute of Physics, University of Helsinki, Helsinki, Finland.; Onnela A; CERN (European Organization for Nuclear Research), Geneva, Switzerland.; Petäjä T; Department of Physics, University of Helsinki, Helsinki, Finland.; Praplan AP; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland.; Santos FD; Laboratory for Systems, Instrumentation, and Modeling in Science and Technology for Space and the Environment (SIM), University of Lisbon and University of Beira Interior, Lisbon, Portugal.; Schallhart S; Department of Physics, University of Helsinki, Helsinki, Finland.; Seinfeld JH; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.; Sipilä M; Department of Physics, University of Helsinki, Helsinki, Finland. Helsinki Institute of Physics, University of Helsinki, Helsinki, Finland.; Spracklen DV; School of Earth and Environment, University of Leeds, Leeds, UK.; Stozhkov Y; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, Moscow, Russia.; Stratmann F; Leibniz Institute for Tropospheric Research, Leipzig, Germany.; Tomé A; Laboratory for Systems, Instrumentation, and Modeling in Science and Technology for Space and the Environment (SIM), University of Lisbon and University of Beira Interior, Lisbon, Portugal.; Tsagkogeorgas G; Leibniz Institute for Tropospheric Research, Leipzig, Germany.; Vaattovaara P; University of Eastern Finland, Kuopio, Finland.; Viisanen Y; Finnish Meteorological Institute, Helsinki, Finland.; Vrtala A; Faculty of Physics, University of Vienna, Vienna, Austria.; Wagner PE; Faculty of Physics, University of Vienna, Vienna, Austria.; Weingartner E; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland.; Wex H; Leibniz Institute for Tropospheric Research, Leipzig, Germany.; Wimmer D; Institute for Atmospheric and Environmental Sciences, Goethe University of Frankfurt, Frankfurt am Main, Germany.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds, UK.; Curtius J; Institute for Atmospheric and Environmental Sciences, Goethe University of Frankfurt, Frankfurt am Main, Germany.; Donahue NM; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213, USA.; Kirkby J; Institute for Atmospheric and Environmental Sciences, Goethe University of Frankfurt, Frankfurt am Main, Germany. CERN (European Organization for Nuclear Research), Geneva, Switzerland.; Kulmala M; Department of Physics, University of Helsinki, Helsinki, Finland. Helsinki Institute of Physics, University of Helsinki, Helsinki, Finland.; Worsnop DR; Department of Physics, University of Helsinki, Helsinki, Finland. Aerodyne Research Incorporated, Billerica, MA 01821, USA.; Baltensperger U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, Switzerland. urs.baltensperger@psi.ch.

Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 0404511 Publication Model: Print Cited Medium: Internet ISSN: 1095-9203 (Electronic) Linking ISSN: 00368075 NLM ISO Abbreviation: Science Subsets: MEDLINE

Almeida J; Goethe-University of Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Schobesberger S; Kürten A; Ortega IK; Kupiainen-Määttä O; Praplan AP; Adamov A; Amorim A; Bianchi F; Breitenlechner M; David A; Dommen J; Donahue NM; Downard A; Dunne E; Duplissy J; Ehrhart S; Flagan RC; Franchin A; Guida R; Hakala J; Hansel A; Heinritzi M; Henschel H; Jokinen T; Junninen H; Kajos M; Kangasluoma J; Keskinen H; Kupc A; Kurtén T; Kvashin AN; Laaksonen A; Lehtipalo K; Leiminger M; Leppä J; Loukonen V; Makhmutov V; Mathot S; McGrath MJ; Nieminen T; Olenius T; Onnela A; Petäjä T; Riccobono F; Riipinen I; Rissanen M; Rondo L; Ruuskanen T; Santos FD; Sarnela N; Schallhart S; Schnitzhofer R; Seinfeld JH; Simon M; Sipilä M; Stozhkov Y; Stratmann F; Tomé A; Tröstl J; Tsagkogeorgas G; Vaattovaara P; Viisanen Y; Virtanen A; Vrtala A; Wagner PE; Weingartner E; Wex H; Williamson C; Wimmer D; Ye P; Yli-Juuti T; Carslaw KS; Kulmala M; Curtius J; Baltensperger U; Worsnop DR; Vehkamäki H; Kirkby J

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: MEDLINE

Atkinson JD; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Murray BJ; Woodhouse MT; Whale TF; Baustian KJ; Carslaw KS; Dobbie S; O'Sullivan D; Malkin TL

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: PubMed not MEDLINE

Kirkby J; CERN, CH-1211 Geneva, Switzerland. jasper.kirkby@cern.ch; Curtius J; Almeida J; Dunne E; Duplissy J; Ehrhart S; Franchin A; Gagné S; Ickes L; Kürten A; Kupc A; Metzger A; Riccobono F; Rondo L; Schobesberger S; Tsagkogeorgas G; Wimmer D; Amorim A; Bianchi F; Breitenlechner M; David A; Dommen J; Downard A; Ehn M; Flagan RC; Haider S; Hansel A; Hauser D; Jud W; Junninen H; Kreissl F; Kvashin A; Laaksonen A; Lehtipalo K; Lima J; Lovejoy ER; Makhmutov V; Mathot S; Mikkilä J; Minginette P; Mogo S; Nieminen T; Onnela A; Pereira P; Petäjä T; Schnitzhofer R; Seinfeld JH; Sipilä M; Stozhkov Y; Stratmann F; Tomé A; Vanhanen J; Viisanen Y; Vrtala A; Wagner PE; Walther H; Weingartner E; Wex H; Winkler PM; Carslaw KS; Worsnop DR; Baltensperger U; Kulmala M

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Electronic Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: PubMed not MEDLINE

Lehtipalo K; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Finnish Meteorological Institute, Erik Palménin aukio 1, 00560 Helsinki, Finland.; Yan C; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Dada L; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Bianchi F; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Xiao M; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Wagner R; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Stolzenburg D; Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.; Ahonen LR; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Amorim A; CENTRA and FCUL, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.; Baccarini A; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Bauer PS; Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.; Baumgartner B; Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.; Bergen A; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Bernhammer AK; University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria.; Ionicon GesmbH, Innsbruck, Austria.; Breitenlechner M; University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria.; Brilke S; Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.; Buchholz A; University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland.; Mazon SB; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Chen D; Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.; Chen X; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Dias A; CENTRA and FCUL, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.; Dommen J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Draper DC; Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA.; Duplissy J; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Ehn M; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Finkenzeller H; Department of Chemistry and CIRES, University of Colorado, Boulder, CO 80309 USA.; Fischer L; University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria.; Frege C; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Fuchs C; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Garmash O; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Gordon H; University of Leeds, Leeds LS2 9JT, UK.; Hakala J; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; He X; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Heikkinen L; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Heinritzi M; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Helm JC; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Hofbauer V; Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.; Hoyle CR; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Jokinen T; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Kangasluoma J; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Aerosol and Haze Laboratory, Beijing University of Chemical Technology, Beijing, China.; Kerminen VM; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Kim C; California Institute of Technology, 210-41, Pasadena, CA 91125, USA.; Kirkby J; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; CERN, CH-1211 Geneva, Switzerland.; Kontkanen J; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Department of Environmental Science and Analytical Chemistry (ACES) and Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden.; Kürten A; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Lawler MJ; Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA.; Mai H; California Institute of Technology, 210-41, Pasadena, CA 91125, USA.; Mathot S; CERN, CH-1211 Geneva, Switzerland.; Mauldin RL 3rd; Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.; Department of Chemistry and CIRES, University of Colorado, Boulder, CO 80309 USA.; Molteni U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Nichman L; School of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK.; Nie W; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Joint International Research Laboratory of Atmospheric and Earth System Sciences, Nanjing University, Nanjing, China.; Collaborative Innovation Center of Climate Change, Jiangsu Province, China.; Nieminen T; University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland.; Ojdanic A; Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.; Onnela A; CERN, CH-1211 Geneva, Switzerland.; Passananti M; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Petäjä T; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Joint International Research Laboratory of Atmospheric and Earth System Sciences, Nanjing University, Nanjing, China.; Piel F; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria.; Ionicon GesmbH, Innsbruck, Austria.; Pospisilova V; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Quéléver LLJ; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Rissanen MP; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Rose C; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Sarnela N; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Schallhart S; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Schuchmann S; CERN, CH-1211 Geneva, Switzerland.; Sengupta K; University of Leeds, Leeds LS2 9JT, UK.; Simon M; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Sipilä M; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Tauber C; Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.; Tomé A; IDL, Universidade da Beira Interior, Covilhã, Portugal.; Tröstl J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Väisänen O; University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland.; Vogel AL; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Laboratory of Environmental Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Volkamer R; Department of Chemistry and CIRES, University of Colorado, Boulder, CO 80309 USA.; Wagner AC; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Wang M; Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.; Weitz L; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Wimmer D; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Ye P; Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.; Aerodyne Research Inc., 45 Manning Road, Billerica, MA 01821, USA.; Ylisirniö A; University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland.; Zha Q; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Carslaw KS; University of Leeds, Leeds LS2 9JT, UK.; Curtius J; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany.; Donahue NM; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA.; Flagan RC; California Institute of Technology, 210-41, Pasadena, CA 91125, USA.; Hansel A; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria.; Ionicon GesmbH, Innsbruck, Austria.; Riipinen I; Department of Environmental Science and Analytical Chemistry (ACES) and Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden.; Aerosol Physics, Faculty of Science, Tampere University of Technology, P.O. Box 692, 33101, Tampere, Finland.; Virtanen A; University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland.; Winkler PM; Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria.; Baltensperger U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.; Kulmala M; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Aerosol and Haze Laboratory, Beijing University of Chemical Technology, Beijing, China.; Helsinki Institute of Physics, FI-00014 Helsinki, Finland.; Worsnop DR; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland.; Aerodyne Research Inc., 45 Manning Road, Billerica, MA 01821, USA.

Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 101653440 Publication Model: eCollection Cited Medium: Internet ISSN: 2375-2548 (Electronic) Linking ISSN: 23752548 NLM ISO Abbreviation: Sci Adv Subsets: PubMed not MEDLINE

Carslaw KS; 1School of Earth and Environment, University of Leeds, Leeds, UK.; Gordon H; 1School of Earth and Environment, University of Leeds, Leeds, UK.; Hamilton DS; 1School of Earth and Environment, University of Leeds, Leeds, UK.; 2College of Agriculture and Life Sciences, Cornell University, Ithaca, New York USA.; Johnson JS; 1School of Earth and Environment, University of Leeds, Leeds, UK.; Regayre LA; 1School of Earth and Environment, University of Leeds, Leeds, UK.; Yoshioka M; 1School of Earth and Environment, University of Leeds, Leeds, UK.; Pringle KJ; 1School of Earth and Environment, University of Leeds, Leeds, UK.

Publisher: Springer International Publishing Country of Publication: Switzerland NLM ID: 101663835 Publication Model: Print-Electronic Cited Medium: Print ISSN: 2198-6061 (Print) NLM ISO Abbreviation: Curr Clim Change Rep Subsets: PubMed not MEDLINE

Stockdale A; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom; tony@biogeochemistry.org.uk.; Krom MD; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Department of Marine Biology, Haifa University, Haifa 3498838, Israel.; Mortimer RJ; School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Brackenhurst Campus, Southwell, Nottinghamshire NG25 0QF, United Kingdom.; Benning LG; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; German Research Center for Geosciences, GFZ, 14473 Potsdam, Germany.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Herbert RJ; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Shi Z; School of Geography and Earth Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom.; Myriokefalitakis S; Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, Heraklion, Greece, GR-71003.; Kanakidou M; Environmental Chemical Processes Laboratory, Department of Chemistry, University of Crete, Heraklion, Greece, GR-71003.; Nenes A; School of Earth & Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332.; School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332.; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Athens, Greece, GR-15236.; Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas, Patras, Greece, GR-26504.

Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE

Gordon H; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland; hamish.gordon@cern.ch k.s.carslaw@leeds.ac.uk.; Sengupta K; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Rap A; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Duplissy J; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Frege C; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Williamson C; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany; Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO 80309; Chemical Sciences Division, National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory, Boulder, CO 80305.; Heinritzi M; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Simon M; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Yan C; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Almeida J; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Tröstl J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Nieminen T; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland; Department of Applied Physics, University of Eastern Finland, FI-70211 Kuopio, Finland.; Ortega IK; Laboratoire de Physique des lasers, Atomes et Molcules Université Lille 1, UMR 8523 CNRS, 59655 Villeneuve d'Ascq, France.; Wagner R; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Dunne EM; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom; Atmospheric Research Centre of Eastern Finland, Finnish Meteorological Institute, 70211 Kuopio, Finland.; Adamov A; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Amorim A; Laboratory for Systems, Instrumentation and Modeling in Science and Technology for Space and the Environment, University of Lisbon and University of Beira Interior, 1849-016 Lisbon, Portugal.; Bernhammer AK; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Bianchi F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Breitenlechner M; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Brilke S; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Chen X; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Craven JS; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125.; Dias A; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland.; Ehrhart S; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Fischer L; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Flagan RC; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125.; Franchin A; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Fuchs C; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Guida R; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland.; Hakala J; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Hoyle CR; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland; Schnee- und Lawinenforschung (SLF), Eidgenössische Forschungsanstalt für Wald, Schnee und Landschaft (WSL) Institute for Snow and Avalanche Research, CH-7260 Davos, Switzerland.; Jokinen T; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Junninen H; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Kangasluoma J; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Kim J; Department of Applied Physics, University of Eastern Finland, FI-70211 Kuopio, Finland; Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 21990, South Korea.; Kirkby J; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Krapf M; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Kürten A; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Laaksonen A; Department of Applied Physics, University of Eastern Finland, FI-70211 Kuopio, Finland; Climate Change Research Unit, Finnish Meteorological Institute, FI-00101 Helsinki, Finland.; Lehtipalo K; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Makhmutov V; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, 119991 Moscow, Russia.; Mathot S; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland.; Molteni U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Monks SA; Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO 80309; Chemical Sciences Division, National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory, Boulder, CO 80305.; Onnela A; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland.; Peräkylä O; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Piel F; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Petäjä T; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Praplan AP; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Pringle KJ; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Richards NA; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom; National Centre for Earth Observation, University of Leeds, LS2 9JT Leeds, United Kingdom.; Rissanen MP; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Rondo L; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Sarnela N; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Schobesberger S; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Scott CE; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Seinfeld JH; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125.; Sharma S; National Centre for Earth Observation, University of Leeds, LS2 9JT Leeds, United Kingdom.; Sipilä M; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Steiner G; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Stozhkov Y; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, 119991 Moscow, Russia.; Stratmann F; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Tomé A; Laboratory for Systems, Instrumentation and Modeling in Science and Technology for Space and the Environment, University of Lisbon and University of Beira Interior, 1849-016 Lisbon, Portugal.; Virtanen A; Department of Applied Physics, University of Eastern Finland, FI-70211 Kuopio, Finland.; Vogel AL; Department of Experimental Physics, CERN (European Organization for Nuclear Research), CH-1211 Geneva, Switzerland.; Wagner AC; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Wagner PE; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Weingartner E; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Wimmer D; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Winkler PM; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Ye P; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213.; Zhang X; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125.; Hansel A; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Dommen J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Donahue NM; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213.; Worsnop DR; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland; Department of Applied Physics, University of Eastern Finland, FI-70211 Kuopio, Finland; Aerodyne Research Inc., Billerica, MA 01821.; Baltensperger U; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.; Kulmala M; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Curtius J; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom; hamish.gordon@cern.ch k.s.carslaw@leeds.ac.uk.

Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE

Kirkby J; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; CERN, CH-1211 Geneva, Switzerland.; Duplissy J; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Sengupta K; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Frege C; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Gordon H; CERN, CH-1211 Geneva, Switzerland.; Williamson C; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Heinritzi M; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Simon M; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Yan C; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Almeida J; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; CERN, CH-1211 Geneva, Switzerland.; Tröstl J; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Nieminen T; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Ortega IK; Onera-The French Aerospace Lab, F-91123 Palaiseau, France.; Wagner R; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Adamov A; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Amorim A; SIM, University of Lisbon, 1849-016 Lisbon, Portugal.; Bernhammer AK; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Bianchi F; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Institute for Atmospheric and Climate Science, ETH Zurich, CH-8092 Zurich, Switzerland.; Breitenlechner M; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Brilke S; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Chen X; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Craven J; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.; Dias A; CERN, CH-1211 Geneva, Switzerland.; Ehrhart S; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; CERN, CH-1211 Geneva, Switzerland.; Flagan RC; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.; Franchin A; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Fuchs C; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Guida R; CERN, CH-1211 Geneva, Switzerland.; Hakala J; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Hoyle CR; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; WSL Institute for Snow and Avalanche Research SLF, CH-7260 Davos, Switzerland.; Jokinen T; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Junninen H; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Kangasluoma J; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Kim J; University of Eastern Finland, FI-70211 Kuopio, Finland.; Krapf M; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Kürten A; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Laaksonen A; University of Eastern Finland, FI-70211 Kuopio, Finland.; Finnish Meteorological Institute, FI-00101 Helsinki, Finland.; Lehtipalo K; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Makhmutov V; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, 119991 Moscow, Russia.; Mathot S; CERN, CH-1211 Geneva, Switzerland.; Molteni U; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Onnela A; CERN, CH-1211 Geneva, Switzerland.; Peräkylä O; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Piel F; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Petäjä T; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Praplan AP; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Pringle K; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Rap A; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Richards NA; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; University of Leeds, National Centre for Earth Observation, Leeds LS2 9JT, UK.; Riipinen I; Department of Applied Environmental Science, University of Stockholm, SE-10961 Stockholm, Sweden.; Rissanen MP; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Rondo L; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Sarnela N; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Schobesberger S; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Scott CE; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Seinfeld JH; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.; Sipilä M; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Steiner G; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Stozhkov Y; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, 119991 Moscow, Russia.; Stratmann F; Leibniz Institute for Tropospheric Research, 04318 Leipzig, Germany.; Tomé A; University of Beira Interior, 6201-001 Covilhã, Portugal.; Virtanen A; University of Eastern Finland, FI-70211 Kuopio, Finland.; Vogel AL; CERN, CH-1211 Geneva, Switzerland.; Wagner AC; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Wagner PE; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Weingartner E; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Wimmer D; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Winkler PM; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Ye P; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.; Zhang X; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.; Hansel A; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Dommen J; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Donahue NM; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.; Worsnop DR; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; University of Eastern Finland, FI-70211 Kuopio, Finland.; Aerodyne Research Inc., Billerica, Massachusetts 01821, USA.; Baltensperger U; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Kulmala M; Department of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, FI-00014 Helsinki, Finland.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Curtius J; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: MEDLINE

Tröstl J; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Chuang WK; Carnegie Mellon University, Center for Atmospheric Particle Studies, Pittsburgh, Pennsylvania 15213, USA.; Gordon H; CERN, CH-1211 Geneva, Switzerland.; Heinritzi M; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Yan C; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Molteni U; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Ahlm L; Department of Applied Environmental Science, University of Stockholm, SE-10961 Stockholm, Sweden.; Frege C; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Bianchi F; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Institute for Atmospheric and Climate Science, ETH Zürich, 8092 Zürich, Switzerland.; Wagner R; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Simon M; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Lehtipalo K; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Williamson C; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Chemical Sciences Division, Earth System Research Laboratory, NOAA, Boulder, Colorado, USA.; Craven JS; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.; Duplissy J; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Adamov A; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Almeida J; CERN, CH-1211 Geneva, Switzerland.; Bernhammer AK; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Breitenlechner M; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Brilke S; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Dias A; CERN, CH-1211 Geneva, Switzerland.; Ehrhart S; CERN, CH-1211 Geneva, Switzerland.; Flagan RC; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.; Franchin A; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Fuchs C; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Guida R; CERN, CH-1211 Geneva, Switzerland.; Gysel M; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Hansel A; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Ionicon Analytik GmbH, 6020 Innsbruck, Austria.; Hoyle CR; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; WSL Institute for Snow and Avalanche Research SLF, 7260 Davos, Switzerland.; Jokinen T; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Junninen H; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Kangasluoma J; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Keskinen H; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; University of Eastern Finland, 70211 Kuopio, Finland.; Kim J; University of Eastern Finland, 70211 Kuopio, Finland.; Krapf M; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Kürten A; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Laaksonen A; University of Eastern Finland, 70211 Kuopio, Finland.; Finnish Meteorological Institute, 00101 Helsinki, Finland.; Lawler M; University of Eastern Finland, 70211 Kuopio, Finland.; National Center for Atmospheric Research, Atmospheric Chemistry Observations and Modeling Laboratory, Boulder, Colorado 80301, USA.; Leiminger M; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Mathot S; CERN, CH-1211 Geneva, Switzerland.; Möhler O; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany.; Nieminen T; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Onnela A; CERN, CH-1211 Geneva, Switzerland.; Petäjä T; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Piel FM; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Miettinen P; University of Eastern Finland, 70211 Kuopio, Finland.; Rissanen MP; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Rondo L; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Sarnela N; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Schobesberger S; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Sengupta K; School of Earth and Environment, University of Leeds, LS2 9JT Leeds, UK.; Sipilä M; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Smith JN; University of Eastern Finland, 70211 Kuopio, Finland.; Department of Chemistry, University of California, Irvine, California 92697, USA.; Steiner G; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Institute for Ion and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria.; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Tomè A; SIM, University of Lisbon and University of Beira Interior, 1849-016 Lisbon, Portugal.; Virtanen A; University of Eastern Finland, 70211 Kuopio, Finland.; Wagner AC; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Weingartner E; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Wimmer D; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Winkler PM; Faculty of Physics, University of Vienna, 1090 Vienna, Austria.; Ye P; Carnegie Mellon University, Center for Atmospheric Particle Studies, Pittsburgh, Pennsylvania 15213, USA.; Carslaw KS; School of Earth and Environment, University of Leeds, LS2 9JT Leeds, UK.; Curtius J; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Dommen J; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.; Kirkby J; CERN, CH-1211 Geneva, Switzerland.; Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, 60438 Frankfurt am Main, Germany.; Kulmala M; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Riipinen I; Department of Applied Environmental Science, University of Stockholm, SE-10961 Stockholm, Sweden.; Worsnop DR; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Helsinki Institute of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Aerodyne Research, Inc., Billerica, Massachusetts 01821, USA.; Donahue NM; Carnegie Mellon University, Center for Atmospheric Particle Studies, Pittsburgh, Pennsylvania 15213, USA.; Department of Physics, University of Helsinki, PO Box 64, FI-00014 Helsinki, Finland.; Baltensperger U; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, CH-5232 Villigen, Switzerland.

Publisher: Nature Publishing Group Country of Publication: England NLM ID: 0410462 Publication Model: Print Cited Medium: Internet ISSN: 1476-4687 (Electronic) Linking ISSN: 00280836 NLM ISO Abbreviation: Nature Subsets: PubMed not MEDLINE

Feingold G; Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305; graham.feingold@noaa.gov.; McComiskey A; Global Monitoring Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305;; Yamaguchi T; Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309;; Johnson JS; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom;; Carslaw KS; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom;; Schmidt KS; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO 80303.

Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE; PubMed not MEDLINE

Seinfeld JH; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125; Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125; seinfeld@caltech.edu.; Bretherton C; Department of Atmospheric Science, University of Washington, Seattle, WA 98195;; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds L32 9JT, United Kingdom;; Coe H; School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester M13 9PL, United Kingdom;; DeMott PJ; Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523;; Dunlea EJ; Board on Atmospheric Science and Climate, National Academies of Sciences, Engineering, and Medicine, Washington, DC 20001;; Feingold G; Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80523;; Ghan S; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352;; Guenther AB; Department of Earth System Science, University of California, Irvine, CA 92697;; Kahn R; Sciences and Exploration Directorate, Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD 20771;; Kraucunas I; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352;; Kreidenweis SM; Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523;; Molina MJ; Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093;; Nenes A; Department of Earth and Atmospheric Science, Georgia Institute of Technology, Atlanta, GA 30332; Department of Chemical and Biological Engineering, Georgia Institute of Technology, Atlanta, GA 30332; Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas, Patras GR-26504, Greece; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palea-Pendeli GR-15236, Greece;; Penner JE; Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109;; Prather KA; Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093;; Ramanathan V; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093;; Ramaswamy V; Geophysical Fluid Dynamics Laboratory, Princeton University and National Oceanic and Atmospheric Administration, Princeton, NJ 08540;; Rasch PJ; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99352;; Ravishankara AR; Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523;; Rosenfeld D; Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel;; Stephens G; Center for Climate Sciences, Jet Propulsion Laboratory, National Aeronautics and Space Administration, Pasadena, CA 91109.; Wood R; Department of Atmospheric Science, University of Washington, Seattle, WA 98195;

Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE; PubMed not MEDLINE

Lee LA; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Reddington CL; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom k.s.carslaw@leeds.ac.uk.

Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: MEDLINE; PubMed not MEDLINE

Hamilton DS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK d.hamilton@leeds.ac.uk.; Lee LA; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Pringle KJ; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Reddington CL; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Spracklen DV; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.; Carslaw KS; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK.

Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: PubMed not MEDLINE

Kürten A; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, 60438 Frankfurt am Main, Germany; kuerten@iau.uni-frankfurt.de.; Jokinen T; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Simon M; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, 60438 Frankfurt am Main, Germany;; Sipilä M; Department of Physics, University of Helsinki, 00014 Helsinki, Finland; Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland;; Sarnela N; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Junninen H; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Adamov A; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Almeida J; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, 60438 Frankfurt am Main, Germany; European Organization for Nuclear Research, CH-1211 Geneva, Switzerland;; Amorim A; Laboratory for Systems, Instrumentation and Modeling for Space and the Environment, University of Lisbon and University of Beira Interior, 1749-016 Lisbon, Portugal;; Bianchi F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland;; Breitenlechner M; Ionicon Analytik GmbH, 6020 Innsbruck, Austria; Institute for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria;; Dommen J; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland;; Donahue NM; Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA 15213;; Duplissy J; Department of Physics, University of Helsinki, 00014 Helsinki, Finland; Helsinki Institute of Physics, University of Helsinki, 00014 Helsinki, Finland; European Organization for Nuclear Research, CH-1211 Geneva, Switzerland;; Ehrhart S; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, 60438 Frankfurt am Main, Germany; European Organization for Nuclear Research, CH-1211 Geneva, Switzerland;; Flagan RC; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125;; Franchin A; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Hakala J; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Hansel A; Ionicon Analytik GmbH, 6020 Innsbruck, Austria; Institute for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria;; Heinritzi M; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, 60438 Frankfurt am Main, Germany; Institute for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria;; Hutterli M; Tofwerk AG, 3600 Thun, Switzerland;; Kangasluoma J; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Kirkby J; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, 60438 Frankfurt am Main, Germany; European Organization for Nuclear Research, CH-1211 Geneva, Switzerland;; Laaksonen A; Department of Applied Physics, University of Eastern Finland, 70211 Kuopio, Finland; Finnish Meteorological Institute, 00101 Helsinki, Finland;; Lehtipalo K; Department of Physics, University of Helsinki, 00014 Helsinki, Finland; Airmodus Ltd., 00560 Helsinki, Finland;; Leiminger M; Institute for Atmospheric and Environmental Sciences, Goethe-University of Frankfurt, 60438 Frankfurt am Main, Germany;; Makhmutov V; Solar and Cosmic Ray Research Laboratory, Lebedev Physical Institute, 119991 Moscow, Russia;; Mathot S; European Organization for Nuclear Research, CH-1211 Geneva, Switzerland;; Onnela A; European Organization for Nuclear Research, CH-1211 Geneva, Switzerland;; Petäjä T; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Praplan AP; Department of Physics, University of Helsinki, 00014 Helsinki, Finland;; Riccobono F; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland;; Rissanen MP; 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Publisher: National Academy of Sciences Country of Publication: United States NLM ID: 7505876 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1091-6490 (Electronic) Linking ISSN: 00278424 NLM ISO Abbreviation: Proc Natl Acad Sci U S A Subsets: PubMed not MEDLINE