Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes
Polar and subpolar planktic foraminifera and the stable oxygen and carbon isotopes of Neogloboqllndrina pachyderma (s) from the Nordic seas are analyzed for the time period since oxygen isotope Stage 12, with special emphasis on interglacial time slices Stages 11,5e (Eeinian), and 1 (Holocene). A co...
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1997
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Online Access: | https://oceanrep.geomar.de/id/eprint/31004/ https://oceanrep.geomar.de/id/eprint/31004/1/Bauch%201997%20Paleoceanography%20of%20N%20A%20Ocean.pdf |
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ftoceanrep:oai:oceanrep.geomar.de:31004 2023-05-15T16:52:28+02:00 Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes Bauch, Henning Hass, H. Christian Kaminski, Michael A. 1997 text https://oceanrep.geomar.de/id/eprint/31004/ https://oceanrep.geomar.de/id/eprint/31004/1/Bauch%201997%20Paleoceanography%20of%20N%20A%20Ocean.pdf en eng Grzybowski Foundation https://oceanrep.geomar.de/id/eprint/31004/1/Bauch%201997%20Paleoceanography%20of%20N%20A%20Ocean.pdf Bauch, H. (1997) Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes . In: Contributions to the micropaleontology and paleoceanography of the northern North Atlantic (collected results from the GEOMAR Bungalow Working Group). , ed. by Hass, H. C. and Kaminski, M. A. Grzybowski Foundation Special Publication, 5 . Grzybowski Foundation, Kraków, pp. 83-100. ISBN 83-901164-5-6 info:eu-repo/semantics/closedAccess Book chapter NonPeerReviewed 1997 ftoceanrep 2023-04-07T15:22:54Z Polar and subpolar planktic foraminifera and the stable oxygen and carbon isotopes of Neogloboqllndrina pachyderma (s) from the Nordic seas are analyzed for the time period since oxygen isotope Stage 12, with special emphasis on interglacial time slices Stages 11,5e (Eeinian), and 1 (Holocene). A comparison of relative ("/I,) and absolute test concentratioi~sf rom two different size fractions reveals a complex downcore pattern for the morphogroup N. pnclzyderma. Ratios of small-sized N. pacllyderr?ln (s) to N. ~vrclzyderrrla (d) vary between Stage 11, the Eemian and the Holocene, due to changes ill test concentrations of N. pachydernla (s) only. As revealed in the downcore records, both coiling varieties of N, paclzydcri7zn are somehow related to each other, but the use of percent data as surface water mass proxy appears to be limited. The most doininant subpolar species, Elrborotalitn qtlinqt~eloba and Globigerinn bulloides, mainly occurred during the Holocene, the Eemian, and Stage 11. Both species are inversely related to N. pnch!jder17za (s) in that their abundai~ces steadily increased during all three interglacials. During these times, C. blllloill~s remained always restricted to the eastern area of the Nordic seas with dominant Atlantic water masses. In contrast T. qutnqllelobn exhibited a much wider distributional pattern. From stable isotopes and faunal variability it is inferred that the entire Nordic seas was covered by sea-ice during the cold seasons in Stage 11 resulting in both, highest test concentrations of N. pnchyderma (s) and highest 613C values observed tluoughout the past 450 ky. For the last two interglacials, oxygen isotope values and test coi~centrationsof T. q~li~zquelobinad icate that warmer surface waters must have prevailed in the western Iceland Sea in the Eeinian compared with any time during the Holocene time interval. Book Part Iceland Nordic Seas North Atlantic Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Polar and subpolar planktic foraminifera and the stable oxygen and carbon isotopes of Neogloboqllndrina pachyderma (s) from the Nordic seas are analyzed for the time period since oxygen isotope Stage 12, with special emphasis on interglacial time slices Stages 11,5e (Eeinian), and 1 (Holocene). A comparison of relative ("/I,) and absolute test concentratioi~sf rom two different size fractions reveals a complex downcore pattern for the morphogroup N. pnclzyderma. Ratios of small-sized N. pacllyderr?ln (s) to N. ~vrclzyderrrla (d) vary between Stage 11, the Eemian and the Holocene, due to changes ill test concentrations of N. pachydernla (s) only. As revealed in the downcore records, both coiling varieties of N, paclzydcri7zn are somehow related to each other, but the use of percent data as surface water mass proxy appears to be limited. The most doininant subpolar species, Elrborotalitn qtlinqt~eloba and Globigerinn bulloides, mainly occurred during the Holocene, the Eemian, and Stage 11. Both species are inversely related to N. pnch!jder17za (s) in that their abundai~ces steadily increased during all three interglacials. During these times, C. blllloill~s remained always restricted to the eastern area of the Nordic seas with dominant Atlantic water masses. In contrast T. qutnqllelobn exhibited a much wider distributional pattern. From stable isotopes and faunal variability it is inferred that the entire Nordic seas was covered by sea-ice during the cold seasons in Stage 11 resulting in both, highest test concentrations of N. pnchyderma (s) and highest 613C values observed tluoughout the past 450 ky. For the last two interglacials, oxygen isotope values and test coi~centrationsof T. q~li~zquelobinad icate that warmer surface waters must have prevailed in the western Iceland Sea in the Eeinian compared with any time during the Holocene time interval. |
author2 |
Hass, H. Christian Kaminski, Michael A. |
format |
Book Part |
author |
Bauch, Henning |
spellingShingle |
Bauch, Henning Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes |
author_facet |
Bauch, Henning |
author_sort |
Bauch, Henning |
title |
Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes |
title_short |
Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes |
title_full |
Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes |
title_fullStr |
Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes |
title_full_unstemmed |
Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes |
title_sort |
paleoceanography of the north atlantic ocean (68°-76°n) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes |
publisher |
Grzybowski Foundation |
publishDate |
1997 |
url |
https://oceanrep.geomar.de/id/eprint/31004/ https://oceanrep.geomar.de/id/eprint/31004/1/Bauch%201997%20Paleoceanography%20of%20N%20A%20Ocean.pdf |
genre |
Iceland Nordic Seas North Atlantic Sea ice |
genre_facet |
Iceland Nordic Seas North Atlantic Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/31004/1/Bauch%201997%20Paleoceanography%20of%20N%20A%20Ocean.pdf Bauch, H. (1997) Paleoceanography of the North Atlantic Ocean (68°-76°N) during the past 450 ky deduced from planktic foraminifera] assemblages and stable isotopes . In: Contributions to the micropaleontology and paleoceanography of the northern North Atlantic (collected results from the GEOMAR Bungalow Working Group). , ed. by Hass, H. C. and Kaminski, M. A. Grzybowski Foundation Special Publication, 5 . Grzybowski Foundation, Kraków, pp. 83-100. ISBN 83-901164-5-6 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1766042764143755264 |