학술논문
Southern Ocean iron enrichment experiment: carbon cycling in high- and low-Si waters
Document Type
Academic Journal
Author
Coale, Kenneth H.; Johnson, Kenneth S.; Chavez, Francisco P.; Buesseler, Ken O.; Barber, Richard T.; Brzezinski, Mark A.; Cochlan, William P.; Millero, Frank J.; Falkowski, Paul G.; Bauer, James E.; Wanninkhof, Rik H.; Kudela, Raphael M.; Altabet, Mark A.; Hales, Burke E.; Takahashi, Taro; Landry, Michael R.; Bidigare, Robert R.; Wang, Xiujun; Chase, Zanna; Strutton, Pete G.; Friederich, Gernot E.; Gorbunov, Maxim Y.; Lance, Veronica P.; Hilting, Anna K.; Hiscock, Michael R.; Demarest, Mark; Hiscock, William T.; Sullivan, Kevin F.; Tanner, Sara J.; Gordon, R. Mike; Hunter, Craig N.; Elrod, Virginia A.; Fitzwater, Steve E.; Jones, Janice L.; Tozzi, Sasha; Koblizek, Michal; Roberts, Alice E.; Herndon, Julian; Brewster, Jodi; Ladizinsky, Nicolas; Smith, Geoffrey; Cooper, David; Timothy, David; Brown, Susan L.; Selph, Karen E.; Sheridan, Cecelia C.; Twining, Benjamin S.; Johnson, Zackary I.
Source
Science. April 16, 2004, Vol. 304 Issue 5669, p408, 7 p.
Subject
Language
English
ISSN
0036-8075
Abstract
The availability of iron is known to exert a controlling influence on biological productivity in surface waters over large areas of the ocean and may have been an important factor in the variation of the concentration of atmospheric carbon dioxide over glacial cycles. The effect of iron in the Southern Ocean is particularly important because of its large area and abundant nitrate, yet iron-enhanced growth of phytoplankton may be differentially expressed between waters with high silicic acid in the south and low silicic acid in the north, where diatom growth may be limited by both silicic acid and iron. Two mesoscale experiments, designed to investigate the effects of iron enrichment in regions with high and low concentrations of silicic add, were performed in the Southern Ocean. These experiments demonstrate iron's pivotal role in controlling carbon uptake and regulating atmospheric partial pressure of carbon dioxide.
The Southern Ocean exerts a major control on the partial pressure of carbon dioxide (pC[O.sub.2]) in the atmosphere. Because rates of photosynthesis and biological carbon export are low in Antarctic [...]
The Southern Ocean exerts a major control on the partial pressure of carbon dioxide (pC[O.sub.2]) in the atmosphere. Because rates of photosynthesis and biological carbon export are low in Antarctic [...]