(Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-02)
Schlegel, Mary Ann
Strong temporal and geographic variabilty in paleocirculation during the latest deglaciation is demonstrated for the Blake Outer Ridge, Western North
Atlantic. Cores KNR140-2 GGC-39 from 2975 meters and GGC-40 from 2924
meters show correlative oscillations in Cibicidoides and Uvigerina
abundances, and δ180 from Globigerinoides ruber (white) which suggest that
the Western Boundary Undercurrent and NADW fluctuated on a decadal to
century scale between 14,000 and 10,000 14C years BP. Furthermore, between
13,500 and 13,300 14C years BP and 10,900 and 10,600 14C years BP, the
coincidence of benthic foraminifera abundance maxima and benthic δ13C
minima from C. wuellerstorfi indicate an increased influence of AABW
relative to NADW in the vicinity of 3000 meters on the Blake Outer Ridge.
