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unknown
Rapid sea level rise and ice sheet response to 8,200-year climate event
Authors
Alley
Alley
+37 more
Barber
Bard
Belknap
Bentley
Colman
Cronin
Cronin
Cuffey
D. A. Willard
Dyke
Ellison
Fairbanks
Fairbanks
Haug
Howat
Ingólfsson
J. Halka
J. Pohlman
Kanfoush
Laj
M. Berke
Masson
Miller
Ota
P. R. Vogt
Peltier
Peltier
R. Thunell
Rohling
Shepherd
Siddall
T. M. Cronin
Teller
Truffer
Törnqvist
Vogt
Willard
Publication date
1 October 2007
Publisher
'American Geophysical Union (AGU)'
Doi
Cite
Abstract
Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 34 (2007): L20603, doi:10.1029/2007GL031318.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.Cronin, Willard, Thunell, Berke supported by USGS Earth Surface Dynamics Program; Vogt and Pohlman by Office of Naval Research; Halka by MGS
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