High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea
Dramatic oceanic changes during the transition from glacial to interglacial conditions had significant effects on pelagic and benthic environments in the Norwegian-Greenland Sea. Fossil marine biota in deep-sea sediments provide the means to reconstruct past oceanographic conditions and climatic flu...
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GSA, Geological Society of America
1997
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ftoceanrep:oai:oceanrep.geomar.de:26920 2023-05-15T16:18:07+02:00 High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea Nees, Stefan Altenbach, Alexander V. Kassens, Heidemarie Thiede, Jörn 1997 text https://oceanrep.geomar.de/id/eprint/26920/ https://oceanrep.geomar.de/id/eprint/26920/1/Geology-1997-Nees-659-62.pdf https://doi.org/10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 en eng GSA, Geological Society of America https://oceanrep.geomar.de/id/eprint/26920/1/Geology-1997-Nees-659-62.pdf Nees, S., Altenbach, A. V., Kassens, H. and Thiede, J. (1997) High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea. Geology, 25 (7). pp. 659-662. DOI 10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 <https://doi.org/10.1130/0091-7613%281997%29025%3C0659%3AHRROFR%3E2.3.CO%3B2>. doi:10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1997 ftoceanrep https://doi.org/10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 2023-04-07T15:16:40Z Dramatic oceanic changes during the transition from glacial to interglacial conditions had significant effects on pelagic and benthic environments in the Norwegian-Greenland Sea. Fossil marine biota in deep-sea sediments provide the means to reconstruct past oceanographic conditions and climatic fluctuations. Here we present the results of an investigation with high temporal resolution (±200 yr) of four sites distributed along a north-south transect across this high-latitude basin with the aim to decipher timing and regional relocation of water-mass boundaries. Results show that termination I in the Norwegian-Greenland Sea is characterized by a prominent maximum of benthic foraminiferal abundance, which progressively moved northward from the eastern North Atlantic Ocean to Fram Strait at a mean velocity of 0.77 km ṁ yr−1. Benthic foraminiferal accumulation rates during this abundance peak increase from south to north from 184 to 5863 specimens ṁ cm−2 ṁ k.y.−1. We interpret this abundance maximum to be a result of high organic carbon fluxes under a moving high productivity area, on the basis of the progression of climatic amelioration and retreat of sea-ice cover during the gradual deglaciation. The benthic foraminiferal record mirrors this time-transgressive belt directly. Article in Journal/Newspaper Fram Strait Greenland Greenland Sea North Atlantic Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Greenland |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Dramatic oceanic changes during the transition from glacial to interglacial conditions had significant effects on pelagic and benthic environments in the Norwegian-Greenland Sea. Fossil marine biota in deep-sea sediments provide the means to reconstruct past oceanographic conditions and climatic fluctuations. Here we present the results of an investigation with high temporal resolution (±200 yr) of four sites distributed along a north-south transect across this high-latitude basin with the aim to decipher timing and regional relocation of water-mass boundaries. Results show that termination I in the Norwegian-Greenland Sea is characterized by a prominent maximum of benthic foraminiferal abundance, which progressively moved northward from the eastern North Atlantic Ocean to Fram Strait at a mean velocity of 0.77 km ṁ yr−1. Benthic foraminiferal accumulation rates during this abundance peak increase from south to north from 184 to 5863 specimens ṁ cm−2 ṁ k.y.−1. We interpret this abundance maximum to be a result of high organic carbon fluxes under a moving high productivity area, on the basis of the progression of climatic amelioration and retreat of sea-ice cover during the gradual deglaciation. The benthic foraminiferal record mirrors this time-transgressive belt directly. |
format |
Article in Journal/Newspaper |
author |
Nees, Stefan Altenbach, Alexander V. Kassens, Heidemarie Thiede, Jörn |
spellingShingle |
Nees, Stefan Altenbach, Alexander V. Kassens, Heidemarie Thiede, Jörn High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea |
author_facet |
Nees, Stefan Altenbach, Alexander V. Kassens, Heidemarie Thiede, Jörn |
author_sort |
Nees, Stefan |
title |
High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea |
title_short |
High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea |
title_full |
High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea |
title_fullStr |
High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea |
title_full_unstemmed |
High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea |
title_sort |
high-resolution record of foraminiferal response to late quaternary sea-ice retreat in the norwegian-greenland sea |
publisher |
GSA, Geological Society of America |
publishDate |
1997 |
url |
https://oceanrep.geomar.de/id/eprint/26920/ https://oceanrep.geomar.de/id/eprint/26920/1/Geology-1997-Nees-659-62.pdf https://doi.org/10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Fram Strait Greenland Greenland Sea North Atlantic Sea ice |
genre_facet |
Fram Strait Greenland Greenland Sea North Atlantic Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/26920/1/Geology-1997-Nees-659-62.pdf Nees, S., Altenbach, A. V., Kassens, H. and Thiede, J. (1997) High-resolution record of foraminiferal response to late Quaternary sea-ice retreat in the Norwegian-Greenland Sea. Geology, 25 (7). pp. 659-662. DOI 10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 <https://doi.org/10.1130/0091-7613%281997%29025%3C0659%3AHRROFR%3E2.3.CO%3B2>. doi:10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1130/0091-7613(1997)025<0659:HRROFR>2.3.CO;2 |
_version_ |
1766004241874288640 |