Determination of δ18O of Seawater in the Deep Ocean during the Last Glacial Maximum

Paleoceanography - Tập 8 Số 1 - Trang 1-6 - 1993
D. P. Schrag, Donald J. DePaolo

Tóm tắt

We present a method for determining the δ18O of seawater in the deep ocean during the last glacial maximum from the measured δ18O values of deep sea pore fluids. Using data from Deep Sea Drilling Project (DSDP) site 576 in the Western Pacific, this method yields a glacial to interglacial change in δ18Osw of 1.0±0.25‰. This value for Δδ18Osw is the first direct measurement of deep ocean δ18O for the last glacial maximum and avoids the problems of spatial and temporal variability of the δ18O of surface water implicit in previous determinations. More precise, higher‐resolution pore fluid measurements are required to improve this determination.

Từ khóa


Tài liệu tham khảo

10.1038/345405a0

10.2973/dsdp.proc.74.121.1984

10.1029/PA004i002p00207

Carslaw H. S., 1959, Conduction of Heat in Solids

10.2973/odp.proc.sr.119.173.1991

Duplessy J.‐C, 1978, Climatic Change, 46

10.1038/342637a0

10.1016/0033-5894(78)90100-X

10.1029/JC093iC07p08249

Kelvin W. T., 1861, The reduction of observations of underground temperature, Trans. R. Soc. Edinburgh, 22, 405

10.1130/0016-7606(1951)62[559:ABDAEC]2.0.CO;2

10.1029/JB086iB09p07924

10.1016/0016-7037(81)90005-3

McDuff R. E., 1984, Initial Reports of the Deep Sea Drilling Project, 675

10.1016/0012-821X(76)90151-5

10.1016/0012-821X(92)90186-Y

Schultheiss P. J., 1984, Initial Reports of the Deep Sea Drilling Project, 701

10.2973/odp.proc.sr.111.150.1989

10.1126/science.256.5062.1434

Simpson J. H., 1958, Diffusion and nuclear spin relaxation in water, Phys. Rev. 2nd Ser., 1201

Thông tin
Thông tin xuất bản

Paleoceanography

Tập 8 Số 1

1-6

Thông tin tác giả