A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica
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 S...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.581.9701 2023-05-15T14:03:09+02:00 A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica Carl Fredrik Forsberg A Reidar Løvlieb Eystein Jansen C Anders Solheima Hans Petter Sejrupc Hans Erik Lied The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.9701 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.9701 Metadata may be used without restrictions as long as the oai identifier remains attached to it. https://bora.uib.no/bitstream/handle/1956/380/forsberg_1956_380.pdf;jsessionid=A95338BFB62E8D3B76AA5E96E4611E5C.bora-uib_worker?sequence=4 Antarctic Weddell Sea Dronning Maud Land palaeoceanography stable isotopes text 2003 ftciteseerx 2016-08-28T00:02:12Z 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 ice-rafted debris may reflect changes in the relative rate of interglacial sedimentation. It is speculated that the high ice rafted debris (IRD) concentrations during interglacials younger than 400 kyr may be due to a reduced relative sedimentation rate of other interglacial components whereas the low concentrations during interglacials before the mid-Pleistocene transition may be due to a higher relative sedimentation rate of these. Text Antarc* Antarctic Antarctica Dronning Maud Land NADW North Atlantic Deep Water North Atlantic Weddell Sea Unknown Antarctic Dronning Maud Land Indian Pacific The Antarctic Weddell Weddell Sea |
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Open Polar |
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ftciteseerx |
language |
English |
topic |
Antarctic Weddell Sea Dronning Maud Land palaeoceanography stable isotopes |
spellingShingle |
Antarctic Weddell Sea Dronning Maud Land palaeoceanography stable isotopes Carl Fredrik Forsberg A Reidar Løvlieb Eystein Jansen C Anders Solheima Hans Petter Sejrupc Hans Erik Lied A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica |
topic_facet |
Antarctic Weddell Sea Dronning Maud Land palaeoceanography stable isotopes |
description |
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 ice-rafted debris may reflect changes in the relative rate of interglacial sedimentation. It is speculated that the high ice rafted debris (IRD) concentrations during interglacials younger than 400 kyr may be due to a reduced relative sedimentation rate of other interglacial components whereas the low concentrations during interglacials before the mid-Pleistocene transition may be due to a higher relative sedimentation rate of these. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Carl Fredrik Forsberg A Reidar Løvlieb Eystein Jansen C Anders Solheima Hans Petter Sejrupc Hans Erik Lied |
author_facet |
Carl Fredrik Forsberg A Reidar Løvlieb Eystein Jansen C Anders Solheima Hans Petter Sejrupc Hans Erik Lied |
author_sort |
Carl Fredrik Forsberg A |
title |
A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica |
title_short |
A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica |
title_full |
A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica |
title_fullStr |
A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica |
title_full_unstemmed |
A 1.3-Myr palaeoceanographic record from the continental margin off Dronning Maud Land, Antarctica |
title_sort |
1.3-myr palaeoceanographic record from the continental margin off dronning maud land, antarctica |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.9701 |
geographic |
Antarctic Dronning Maud Land Indian Pacific The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Dronning Maud Land Indian Pacific The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land NADW North Atlantic Deep Water North Atlantic Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land NADW North Atlantic Deep Water North Atlantic Weddell Sea |
op_source |
https://bora.uib.no/bitstream/handle/1956/380/forsberg_1956_380.pdf;jsessionid=A95338BFB62E8D3B76AA5E96E4611E5C.bora-uib_worker?sequence=4 |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.9701 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766273722751123456 |