|
BORA >
University of Bergen >
Research centres and projects >
BCCR - Bjerknes Centre for Climate Research >
Eprints by the Bjerknes Centre for Climate Research (BCCR) >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1956/380
|
| Title: | A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica |
| Authors: | Forsberg, C. F.
Løvlie, R.
Jansen, E.
Solheim, A.
Sejrup, H. P.
Lie, H. E. |
| Keywords: | Antarctic
Weddell Sea
Dronning Maud Land
palaeoceanography
stable isotopes
magnetostratigraphy |
| Issue Date: | 3-Mar-2003 |
| Publisher: | Elsevier |
| Series/Report no.: | Palaeogeography, Palaeoclimatology, Palaeoecology;198 |
| Abstract: | A 12.5 m long core was retrieved from the continental margin off Dronning Maud Land, Antarctica.
Magnetostratigraphy, stable isotopes, 14C accelerator mass spectrometer and amino acid analyses indicate a
continuous sediment record going back 1.3 Myr. Comparison of CaCO3 results with those from ODP Site 1089 and
an index of North Atlantic Deep Water (NADW) influence in surface waters indicate that NADW upwelled along the
Antarctic continental margin during the whole of this period. The mid-Pleistocene transition (1.0^0.6 Ma) was
accompanied by an apparent decline in the NADW influence, and was followed by extended carbonate dissolution
during the interglacials of marine isotope stages (MIS) 13 and 11. Less extensive periods of dissolution occur at the
end of the interglacials younger than MIS 11. While interglacial dissolution is characteristic of the Pacific and Indian
oceans, the carbon isotopes return to pre-transition values indicative of renewed NADW upwelling. The
concentration of... |
| URI: | http://hdl.handle.net/1956/380 |
| ISSN: | 0031-0182 |
| Appears in Collections: | Eprints by the Bjerknes Centre for Climate Research (BCCR)
|
Files in This Item:
| File |
Size | Format |
|---|
| BCCR-Forsberg.pdf | 725Kb | Adobe PDF | View/Open |
|
Show full item record
All items in BORA are protected by copyright, with all rights reserved.
|
