10.1594/PANGAEA.726217
Duplessy, Jean-Claude
Jean-Claude
Duplessy
Stable carbon and oxygen isotope ratios of foraminifera from North Atlantic sediments
PANGAEA
1982
Drilling/drill rig
Piston corer
Leg70
CH7X
MD10
MD13
MD00
RC12
Glomar Challenger
Jean Charcot
Marion Dufresne (1972)
Robert Conrad
1969-05-19T00:00:00/1979-11-15T00:00:00
en
Supplementary Publication Series of Datasets
9 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Oxygen-18 records of benthic foraminifera from the Atlantic Ocean are significantly different from those of the Pacific and Indian Oceans indicating that the Glacial North Atlantic Deep Water was about 1.3°C cooler than today because different deep water sources appeared in the North Atlantic Ocean during glacial times. The present study seeks to interprete carbon-13 records of planktonic and benthic foraminifera as a tracer of the cycle of the CO2 dissolved in surface and deep water of the ocean during the last climatic cycle.
Carbon-13 records of planktonic foraminifera indicate that the delta13C of atmospheric CO2 and total CO2 dissolved in surface water did not vary noticeably (-0.2 +/- 0.3 per mil) during glacial times.
Carbon-13 records of benthic foraminifera indicate that the eastern North Atlantic Ocean was an area of deep water formation dying isotopic stage 2, but not during most of stage 3. Moreover, large delta13C differences in the NADW between 20°N and 50°N show that the residence time of the glacial NADW was about 4 times that of today.
Supplement to: Duplessy, Jean-Claude (1982): North Atlantic deep water circulation during the last climate cycle. Bulletin de l'Institut de Geologie du Bassin d'Aquitaine, 31, 379-391
-86.0913
96.067
-43.49
54.6333
North Pacific/MOUND
Indian Ocean