Three amphi-Atlantic century-scale cold events during the Bølling-Allerød warm period
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چکیده
منابع مشابه
On the Abruptness of Bølling–Allerød Warming
Previous observations and simulations suggest that an approximate 38–58C warming occurred at intermediate depths in theNorthAtlantic over severalmillennia duringHeinrich stadial 1 (HS1), which induces warm salty water (WSW) lying beneath surface cold freshwater. This arrangement eventually generates ocean convective available potential energy (OCAPE), themaximumpotential energy releasable by ad...
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Meltwater pulse 1A (mwp-1A) was a prominent feature of the last deglaciation, which led to a sea-level rise of approximately 20 meters in less than 500 years. Concurrent with mwp-1A was the onset of the Bølling-Allerød interstadial event (14,600 years before the present), which marked the termination of the last glacial period. Previous studies have been unable to reconcile a warm Northern Hemi...
متن کاملRelative timing of deglacial climate events in Antarctica and Greenland.
The last deglaciation was marked by large, hemispheric, millennial-scale climate variations: the Bølling-Allerød and Younger Dryas periods in the north, and the Antarctic Cold Reversal in the south. A chronology from the high-accumulation Law Dome East Antarctic ice core constrains the relative timing of these two events and provides strong evidence that the cooling at the start of the Antarcti...
متن کاملRapid response of forested vegetation to multiple climatic oscillations during the last deglaciation in the northeastern United States
I present new isotopic and pollen results from a marl lake (White Lake) in the Mid-Atlantic region of USA to discuss the coupling of climate and vegetation changes. Oxygen isotopes of calcite from this site show multiple oscillations at millennial and centennial scales, including the Younger Dryas with 3‰ negative shifts in δO at 12.4–11.4 ka (1 ka=1000 cal yr BP) and three cold events of magni...
متن کاملDeglacial variability in the surface return flow of the Atlantic meridional overturning circulation
[1] Benthic foraminiferal Cd/Ca from a Florida Current sediment core documents the history of the northward penetration of southern source waters within the surface return flow of the Atlantic meridional overturning circulation (AMOC). Cd seawater estimates (CdW) indicate that intermediate-depth southern source waters crossed the equator and contributed to the Florida Current during the Bølling...
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ژورنال
عنوان ژورنال: Géographie physique et Quaternaire
سال: 2004
ISSN: 1492-143X,0705-7199
DOI: 10.7202/008301ar