Publikationsdatum:
2022-05-25
Beschreibung:
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.
Beschreibung:
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.
Beschreibung:
Cronin, Willard, Thunell, Berke
supported by USGS Earth Surface Dynamics Program; Vogt and Pohlman
by Office of Naval Research; Halka by MGS.
Schlagwort(e):
Sea-level rise
;
Holocene
;
8.2 ka event
Repository-Name:
Woods Hole Open Access Server
Materialart:
Article
Format:
application/pdf
Format:
text/plain
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