HR: 17:30h
AN: PP24A-07 INVITED     [Abstracts]
TI: The pre YD Agassiz Flood
AU: * Broecker, W S
EM: broecker@ldeo.columbia.edu
AF: Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W/P.O. Box 1000, Palisades, NY 10964-8000 United States
AB: Ever since the publication of the Gulf of Mexico ¹⁸O record by Kennett and Shackleton (1975), it has been generally accepted that the overflow of proglacial Lake Agassiz was diverted from the Mississippi River drainage system just prior to the onset of the Younger Dryas. Jim Teller has long championed a scenario involving diversion of the outflow through the Great Lakes into the St. Lawrence drainage. Klaus Rooth was the first to propose that a flood resulting from the opening of the Agassiz eastern outlet freshened the surface waters in the northern Atlantic, thereby shutting down the Atlantic's conveyor circulation. A seductive story; but is it true?
DE: 1115 Radioisotope geochronology
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 3022 Marine sediments: processes and transport
DE: 4808 Chemical tracers
DE: 4901 Abrupt/rapid climate change (1605)
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005