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Rapid sea level rise and ice sheet response to 8,200-year climate event

Geophysical Research Letters

By:
, , , , , ,
DOI: 10.1029/2007GL031318

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Abstract

The largest abrupt climatic reversal of the Holocene interglacial, the cooling event 8.6–8.2 thousand years ago (ka), was probably caused by catastrophic release of glacial Lake Agassiz-Ojibway, which slowed Atlantic meridional overturning circulation (AMOC) and cooled global climate. Geophysical surveys and sediment cores from Chesapeake Bay reveal the pattern of sea level rise during this event. Sea level rose ∼14 m between 9.5 to 7.5 ka, a pattern consistent with coral records and the ICE-5G glacio-isostatic adjustment model. There were two distinct periods at ∼8.9–8.8 and ∼8.2–7.6 ka when Chesapeake marshes were drown as sea level rose rapidly at least ∼12 mm yr−1. The latter event occurred after the 8.6–8.2 ka cooling event, coincided with extreme warming and vigorous AMOC centered on 7.9 ka, and may have been due to Antarctic Ice Sheet decay.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Rapid sea level rise and ice sheet response to 8,200-year climate event
Series title:
Geophysical Research Letters
DOI:
10.1029/2007GL031318
Volume
34
Issue:
20
Year Published:
2007
Language:
English
Publisher:
Wiley
Description:
L20603; 6 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Number of Pages:
6