A subtropical fate awaited freshwater discharged from glacial Lake Agassiz
نویسندگان
چکیده
منابع مشابه
A subtropical fate awaited freshwater discharged from glacial Lake Agassiz
[1] The 8.2 kyr event is the largest abrupt climatic change recorded in the last 10,000 years, and is widely hypothesized to have been triggered by the release of thousands of kilometers cubed of freshwater into the North Atlantic Ocean. Using a high‐resolution (1/6°) global, ocean‐ice circulation model we present an alternative view that freshwater discharged from glacial Lake Agassiz would ha...
متن کاملReduced North Atlantic deep water coeval with the glacial Lake Agassiz freshwater outburst.
An outstanding climate anomaly 8200 years before the present (B.P.) in the North Atlantic is commonly postulated to be the result of weakened overturning circulation triggered by a freshwater outburst. New stable isotopic and sedimentological records from a northwest Atlantic sediment core reveal that the most prominent Holocene anomaly in bottom-water chemistry and flow speed in the deep limb ...
متن کاملFreshwater Discharge, Sediment Transport, and Modeled Climate Impacts of the Final Drainage of Glacial Lake Agassiz
A cold event at around 8200 calendar years BP and the release, at around that time, of a huge freshwater outburst from ice-dammed glacial Lake Agassiz have lent support to the idea that the flood triggered the cold event. Some suggest that the freshwater addition caused a weakening of the North Atlantic meridional overturning circulation (MOC) thereby reducing the ocean transport of heat to hig...
متن کاملFreshwater outbursts to the oceans from glacial Lake Agassiz and their role in climate change during the last deglaciation
Lake Agassiz was the largest lake in North America during the last deglaciation. As the Laurentide Ice Sheet (LIS) retreated, large volumes of water stored in this proglacial lake were episodically released into the oceans. These waters were variably routed to the Gulf of Mexico, Arctic Ocean, North Atlantic Ocean, and Hudson Bay. During this period, the three largest cooling events in the Nort...
متن کاملPaleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz
Paleotopographic reconstructions of the eastern outlets of glacial Lake Agassiz provide a foundation for understanding the complex manner in which terrain morphology controlled the routing of overflow through the eastern outlets during the lake's Nipigon Phase (ca. 9400-8000 ''^C years BP) and for understanding the causes of outlet-driven declines in lake level during that period. Although flow...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2011
ISSN: 0094-8276
DOI: 10.1029/2010gl046011