HR: 0800h
AN: PP51C-1350    [Abstracts]
TI: North Atlantic Intermediate-Depth Circulation During the Holocene: Evidence From Simultaneous Benthic Foraminiferal Mg/Ca and Cd/Ca Data
AU: * Came, R E
EM: rcame@whoi.edu
AF: Massachusetts Institute of Technology/Woods Hole Oceanographic Institution Joint Program in Oceanography, Woods Hole Road, Woods Hole, MA 02543 United States
AU: Oppo, D W
EM: doppo@whoi.edu
AF: Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole Road, Woods Hole, MA 02543 United States
AU: Curry, W B
EM: wcurry@whoi.edu
AF: Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole Road, Woods Hole, MA 02543 United States
AB: Until just recently, the Holocene epoch had been considered a time of relative climate stability. However, a growing body of evidence is beginning to emerge that suggests centennial-millennial scale variability in both the North Atlantic atmospheric circulation and deepwater circulation (O'Brien et al., 1995; Bond et al., 1997; Bianchi and McCave, 1999; Oppo et al., 2003). At present, intermediate-water variability during the Holocene is not well understood, yet the formation of intermediate water masses in the North Atlantic may be an important mechanism of northward heat transport. We present a down-core record of benthic foraminiferal Cd/Ca and Mg/Ca from an intermediate-depth core taken from the Little Bahama Bank. Our data suggest that the influence of North Atlantic Intermediate Water at this site varied on centennial-millennial timescales, providing further evidence of ocean/atmosphere variability during the Holocene epoch.
DE: 4875 Trace elements
DE: 4267 Paleoceanography
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2004 AGU Fall Meeting