Paleoceanographic variability on a millennial scale: a high resolution record of the latest deglaciation from the Blake Outer Ridge, western North Atlantic
Schlegel, Mary Ann
MetadataShow full item record
LocationBlake Outer Ridge
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.
Submitted in partial fulfillment of the requirements of the degree of Master of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution February 1998
Showing items related by title, author, creator and subject.
Barth, John A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-10)A two-layer shallow water equation model is used to investigate the linear stability of a coastal upwelling front. The model features a surface front near a coastal boundary and bottom topography which is an arbitrary ...
Alpert, Alice (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2016-09)Paleoclimate archives place the short instrumental record of climate variability in a longer temporal context and allow better understanding of the rate, nature and extent by which anthropogenic warming will i ...
Christeson, Gail L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1994-02)This thesis is concerned with understanding how oceanic crust is emplaced at mid-ocean ridges. The emphasis is upon fast-spreading ridges, and the use of seismic techniques to image the uppermost several hundred meters ...