HR: 1340h
AN: PP13B-1489    [Abstracts]
TI: Variability in the Influence of Southern Source Waters within the Florida Current Over the Last 20,000 Years
AU: * Came, R E
EM: rcame@whoi.edu
AF: MIT/WHOI Joint Program in Oceanography, Woods Hole Rd, Woods Hole, MA 02543 United States
AU: Oppo, D W
EM: doppo@whoi.edu
AF: Woods Hole Oceanographic Institution, Woods Hole Rd, Woods Hole, MA 02543 United States
AU: Curry, W B
EM: wcurry@whoi.edu
AF: Woods Hole Oceanographic Institution, Woods Hole Rd, Woods Hole, MA 02543 United States
AB: Benthic foraminiferal Cd/Ca from a Florida Current core documents the history of the northward penetration of southern source waters within the return flow of the Atlantic meridional overturning circulation. Cd seawater estimates for the last glacial are consistent with the reduced influence of southern source waters at this location relative to the present. At approximately 18.5 ka, the southern source contribution to the Florida Current began to increase significantly, marking the onset of a transition from a glacial circulation pattern to a deglacial pattern, which lasted from approximately 17 ka to 14 ka. At approximately 12.5 ka, the influence of southern source waters within the Florida Current decreased abruptly. A renewed influence of southern source waters occurred at approximately 9 ka, concurrent with the establishment of Holocene warmth in the North Atlantic region.
DE: 4901 Abrupt/rapid climate change (1605)
DE: 4924 Geochemical tracers
SC: Paleoceanography and Paleoclimatology [PP]
MN: Fall Meeting 2005