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

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

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3420603c&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 20, CiteID L20603

Astronomy and Astrophysics

Astrophysics

5

Global Change: Sea Level Change (1222, 1225, 4556), Global Change: Abrupt/Rapid Climate Change (4901, 8408), Biogeosciences: Paleoclimatology And Paleoceanography (3344, 4900), Cryosphere: Ice Sheets, Geodesy And Gravity: Ocean/Earth/Atmosphere/Hydrosphere/Cryosphere Interactions (0762, 1218, 3319, 4550)

Scientific paper

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.

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