Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean
We reconstructed late Quaternary deep (3000–4100 m) and intermediate depth (1000–2500 m) paleoceanographic history of the Eurasian Basin, Arctic Ocean from ostracode assemblages in cores from the Lomonosov Ridge, Gakkel Ridge, Yermak Plateau, Morris Jesup Rise, and Amundsen and Makarov Basins obtain...
Published in: | Paleoceanography |
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Language: | English |
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AGU (American Geophysical Union)
1995
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Online Access: | https://oceanrep.geomar.de/id/eprint/31306/ https://oceanrep.geomar.de/id/eprint/31306/1/Cronin.pdf https://doi.org/10.1029/94PA03149 |
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ftoceanrep:oai:oceanrep.geomar.de:31306 2023-05-15T14:25:35+02:00 Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean Cronin, T. M. Holtz, T. R. Stein, R. Spielhagen, Robert F. Fütterer, D. Wollenburg, J. 1995 text https://oceanrep.geomar.de/id/eprint/31306/ https://oceanrep.geomar.de/id/eprint/31306/1/Cronin.pdf https://doi.org/10.1029/94PA03149 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/31306/1/Cronin.pdf Cronin, T. M., Holtz, T. R., Stein, R., Spielhagen, R. F., Fütterer, D. and Wollenburg, J. (1995) Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean. Paleoceanography, 10 (2). pp. 259-281. DOI 10.1029/94PA03149 <https://doi.org/10.1029/94PA03149>. doi:10.1029/94PA03149 info:eu-repo/semantics/embargoedAccess Article PeerReviewed 1995 ftoceanrep https://doi.org/10.1029/94PA03149 2023-04-07T15:23:20Z We reconstructed late Quaternary deep (3000–4100 m) and intermediate depth (1000–2500 m) paleoceanographic history of the Eurasian Basin, Arctic Ocean from ostracode assemblages in cores from the Lomonosov Ridge, Gakkel Ridge, Yermak Plateau, Morris Jesup Rise, and Amundsen and Makarov Basins obtained during the 1991 Polarstern cruise. Modern assemblages on ridges and plateaus between 1000 and 1500 m are characterized by abundant, relatively species-rich benthic ostracode assemblages, in part, reflecting the influence of high organic productivity and inflowing Atlantic water. In contrast, deep Arctic Eurasian basin assemblages have low abundance and low diversity and are dominated by Krithe and Cytheropteron reflecting faunal exchange with the Greenland Sea via the Fram Strait. Major faunal changes occurred in the Arctic during the last glacial/interglacial transition and the Holocene. Low-abundance, low-diversity assemblages from the Lomonosov and Gakkel Ridges in the Eurasian Basin from the last glacial period have modern analogs in cold, low-salinity, low-nutrient Greenland Sea deep water; glacial assemblages from the deep Nansen and Amundsen Basins have modern analogs in the deep Canada Basin. During Termination 1 at intermediate depths, diversity and abundance increased coincident with increased biogenic sediment, reflecting increased organic productivity, reduced sea-ice, and enhanced inflowing North Atlantic water. During deglaciation deep Nansen Basin assemblages were similar to those living today in the deep Greenland Sea, perhaps reflecting deepwater exchange via the Fram Strait. In the central Arctic, early Holocene faunas indicate weaker North Atlantic water inflow at middepths immediately following Termination 1, about 8500–7000 year B.P., followed by a period of strong Canada Basin water overflow across the Lomonosov Ridge into the Morris Jesup Rise area and central Arctic Ocean. Modern perennial sea-ice cover evolved over the last 4000–5000 years. Late Quaternary faunal changes reflect benthic ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean canada basin Central Arctic Fram Strait Greenland Greenland Sea Lomonosov Ridge Nansen Basin North Atlantic Sea ice Yermak plateau OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Canada Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Greenland Morris Jesup Rise ENVELOPE(-20.000,-20.000,83.750,83.750) Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Paleoceanography 10 2 259 281 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
We reconstructed late Quaternary deep (3000–4100 m) and intermediate depth (1000–2500 m) paleoceanographic history of the Eurasian Basin, Arctic Ocean from ostracode assemblages in cores from the Lomonosov Ridge, Gakkel Ridge, Yermak Plateau, Morris Jesup Rise, and Amundsen and Makarov Basins obtained during the 1991 Polarstern cruise. Modern assemblages on ridges and plateaus between 1000 and 1500 m are characterized by abundant, relatively species-rich benthic ostracode assemblages, in part, reflecting the influence of high organic productivity and inflowing Atlantic water. In contrast, deep Arctic Eurasian basin assemblages have low abundance and low diversity and are dominated by Krithe and Cytheropteron reflecting faunal exchange with the Greenland Sea via the Fram Strait. Major faunal changes occurred in the Arctic during the last glacial/interglacial transition and the Holocene. Low-abundance, low-diversity assemblages from the Lomonosov and Gakkel Ridges in the Eurasian Basin from the last glacial period have modern analogs in cold, low-salinity, low-nutrient Greenland Sea deep water; glacial assemblages from the deep Nansen and Amundsen Basins have modern analogs in the deep Canada Basin. During Termination 1 at intermediate depths, diversity and abundance increased coincident with increased biogenic sediment, reflecting increased organic productivity, reduced sea-ice, and enhanced inflowing North Atlantic water. During deglaciation deep Nansen Basin assemblages were similar to those living today in the deep Greenland Sea, perhaps reflecting deepwater exchange via the Fram Strait. In the central Arctic, early Holocene faunas indicate weaker North Atlantic water inflow at middepths immediately following Termination 1, about 8500–7000 year B.P., followed by a period of strong Canada Basin water overflow across the Lomonosov Ridge into the Morris Jesup Rise area and central Arctic Ocean. Modern perennial sea-ice cover evolved over the last 4000–5000 years. Late Quaternary faunal changes reflect benthic ... |
format |
Article in Journal/Newspaper |
author |
Cronin, T. M. Holtz, T. R. Stein, R. Spielhagen, Robert F. Fütterer, D. Wollenburg, J. |
spellingShingle |
Cronin, T. M. Holtz, T. R. Stein, R. Spielhagen, Robert F. Fütterer, D. Wollenburg, J. Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean |
author_facet |
Cronin, T. M. Holtz, T. R. Stein, R. Spielhagen, Robert F. Fütterer, D. Wollenburg, J. |
author_sort |
Cronin, T. M. |
title |
Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean |
title_short |
Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean |
title_full |
Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean |
title_fullStr |
Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean |
title_full_unstemmed |
Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean |
title_sort |
late quaternary paleoceanography of the eurasian basin, arctic ocean |
publisher |
AGU (American Geophysical Union) |
publishDate |
1995 |
url |
https://oceanrep.geomar.de/id/eprint/31306/ https://oceanrep.geomar.de/id/eprint/31306/1/Cronin.pdf https://doi.org/10.1029/94PA03149 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(-20.000,-20.000,83.750,83.750) ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Canada Gakkel Ridge Greenland Morris Jesup Rise Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Canada Gakkel Ridge Greenland Morris Jesup Rise Yermak Plateau |
genre |
Arctic Arctic Arctic Ocean canada basin Central Arctic Fram Strait Greenland Greenland Sea Lomonosov Ridge Nansen Basin North Atlantic Sea ice Yermak plateau |
genre_facet |
Arctic Arctic Arctic Ocean canada basin Central Arctic Fram Strait Greenland Greenland Sea Lomonosov Ridge Nansen Basin North Atlantic Sea ice Yermak plateau |
op_relation |
https://oceanrep.geomar.de/id/eprint/31306/1/Cronin.pdf Cronin, T. M., Holtz, T. R., Stein, R., Spielhagen, R. F., Fütterer, D. and Wollenburg, J. (1995) Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean. Paleoceanography, 10 (2). pp. 259-281. DOI 10.1029/94PA03149 <https://doi.org/10.1029/94PA03149>. doi:10.1029/94PA03149 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1029/94PA03149 |
container_title |
Paleoceanography |
container_volume |
10 |
container_issue |
2 |
container_start_page |
259 |
op_container_end_page |
281 |
_version_ |
1766298022281478144 |