New faunal and isotopic evidence on the Late Weichselian--Holocene oceanographic changes in the Norwegian Sea
Sejrup, H.P.; Jansen, E.; Erlenkeuser, H.; Holtedahl, H. (1982). New faunal and isotopic evidence on the Late Weichselian--Holocene oceanographic changes in the Norwegian Sea. Quatern. Res. 21(1): 74-84
In: Quaternary Research. Academic Press: New York. ISSN 0033-5894; e-ISSN 1096-0287, meer
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| Trefwoorden |
Fossils > Animal fossils > Fossil foraminifera
Geological time > Phanerozoic > Geological time > Cenozoic > Quaternary > Holocene
Isotopes > Carbon isotopes > Carbon 13
Isotopes > Oxygen isotopes
Motion > Water motion > Circulation > Water circulation > Ocean circulation
Marien/Kust |
| Auteurs | | Top |
- Sejrup, H.P.
- Jansen, E.
- Erlenkeuser, H.
- Holtedahl, H.
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| Abstract |
Downcore studies of planktonic and benthonic foraminifera and delta18 O and delta13C in the planktonic foraminfer Neogloboquadrina pachyderma (sin.) in two piston cores from the southern part of the Norwegian Sea suggest large changes in the oceanic circulation pattern at the the end of oxygen-isotope stage 2 and in the early part of stage. Prior to oxygen-isotope Termination IA (16,000-13,000 yr B.P.), an isolated watermass with lower oxygen content and temperature warmer than today existed below a low salinity ice-covered surface layer in the Norwegian Sea. Close to Termination IA, well-oxygenated deep water, probably with positive temperatures, was introduced. This deep water, which must have had physical and/or chemical parameters different from those of present deep water in the Norwegian Sea, could have been introduced from the North Atlantic. |
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