학술논문

Southern Europe hydroclimatic oscillations at MIS 5a.
Document Type
Article
Source
Geophysical Research Abstracts. 2019, Vol. 21, p1-1. 1p.
Subject
*CLIMATE change
*ICE sheets
*OSCILLATIONS
*GLOBAL warming
*INTERGLACIALS
*STALACTITES & stalagmites
Language
ISSN
1029-7006
Abstract
The front section of marine isotope stage (MIS) 5a, 84.5-76.0 ka, after an abrupt globaltemperature rise from MIS 5b, 95.0-84.5 ka, has been considered as a good analoguefor understanding the anthropogenic impact of current global warming on Earth.However, lack of well-calendared paleoclimate records hampers our understandingof regional climatic change and global links on centennial-to-millennial scales.Here, we present a 230Th-dated stalagmite δ18O-inferred precipitation time seriesduring 83.7-80.2 ka from Observatoire Cave (43∘44’N, 7∘25’E), Monaco, southernEurope. It shows a millennial decreasing precipitation trend from 83.7 to 82.5 kawith an abrupt 200-yr wet event at 82.7 ka and a rapid shift from aridity to wetnessduring 82.5-82.4 ka, followed by a relatively stable condition at 82.4-80.2 ka insouthern Europe. This hydroclimatic variability concurs with the decrease sea surfacetemperature in the Mediterranean and an ice rafted debris event in Nordic Sea onmulti-centennial-to-millennial scales. Coupled with published global proxy records, theresults show that southern Europe hydroclimate is dominantly influenced by high latitude inthe northern hemisphere and westerlies. The results suggest that southern Europe is sensitiveto the climate change and ice sheet variability in high-latitude northern Eurasia. [ABSTRACT FROM AUTHOR]

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