Surface water changes in the Norwegian Sea during last deglacial and Holocene times
Stable carbon and oxygen isotopes of the polar planktic foraminifera Neogloboquadrina pachyderma sinistral from sediment cores of the Norwegian Sea reveal several anomalous 13C and δ18O depletions in the surface water during the last glacial to interglacial transition and during the later Holocene....
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ftoceanrep:oai:oceanrep.geomar.de:28207 2023-05-15T16:12:07+02:00 Surface water changes in the Norwegian Sea during last deglacial and Holocene times Bauch, Henning A. Weinelt, Mara S. 1997 text https://oceanrep.geomar.de/id/eprint/28207/ https://oceanrep.geomar.de/id/eprint/28207/1/1997_Bauch-WeineltMS-Surface_QRS-16.pdf https://doi.org/10.1016/S0277-3791(96)00075-3 en eng Elsevier https://oceanrep.geomar.de/id/eprint/28207/1/1997_Bauch-WeineltMS-Surface_QRS-16.pdf Bauch, H. A. and Weinelt, M. S. (1997) Surface water changes in the Norwegian Sea during last deglacial and Holocene times. Quaternary Science Reviews, 16 (10). pp. 1115-1124. DOI 10.1016/S0277-3791(96)00075-3 <https://doi.org/10.1016/S0277-3791%2896%2900075-3>. doi:10.1016/S0277-3791(96)00075-3 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1997 ftoceanrep https://doi.org/10.1016/S0277-3791(96)00075-3 2023-04-07T15:18:33Z Stable carbon and oxygen isotopes of the polar planktic foraminifera Neogloboquadrina pachyderma sinistral from sediment cores of the Norwegian Sea reveal several anomalous 13C and δ18O depletions in the surface water during the last glacial to interglacial transition and during the later Holocene. The depletions that are observed between the Last Glacial Maximum (LGM) and the end of the main deglacial phase were caused by massive releases of freshwater from thawing icebergs, which consequently resulted in a stratification of the uppermost surface water layer and a non-equilibrium between the water below and the atmosphere. At ~8.5 ka (14C BP) this strong iceberg melting activity ceased as defined by the cessation of the deposition of ice-rafted detritus. After this time, the dominant polar and subpolar planktic foraminiferal species rapidly increased in numbers. However, this post-deglacial evolution towards a modern-type oceanographic environment was interupted by a hitherto undescribed isotopic event (~7–8 ka) which, on a regional scale, is only identified in eastern Norwegian Sea surface water. This event may be associated with the final pulse of glacier meltwater release from Fennoscandia, which affected the onset of intensified coastal surface water circulation off Norway during a time of regional sea-level rise. All these data indicate that surface water changes are an integral part of deglacial processes in general. Yet, the youngest observed change noted around 3 ka gives evidence that such events with similar effects occur even during the later Holocene when from a climatic point of view relativelystable conditions prevailed. Article in Journal/Newspaper Fennoscandia glacier Neogloboquadrina pachyderma Norwegian Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Norway Norwegian Sea Quaternary Science Reviews 16 10 1115 1124 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Stable carbon and oxygen isotopes of the polar planktic foraminifera Neogloboquadrina pachyderma sinistral from sediment cores of the Norwegian Sea reveal several anomalous 13C and δ18O depletions in the surface water during the last glacial to interglacial transition and during the later Holocene. The depletions that are observed between the Last Glacial Maximum (LGM) and the end of the main deglacial phase were caused by massive releases of freshwater from thawing icebergs, which consequently resulted in a stratification of the uppermost surface water layer and a non-equilibrium between the water below and the atmosphere. At ~8.5 ka (14C BP) this strong iceberg melting activity ceased as defined by the cessation of the deposition of ice-rafted detritus. After this time, the dominant polar and subpolar planktic foraminiferal species rapidly increased in numbers. However, this post-deglacial evolution towards a modern-type oceanographic environment was interupted by a hitherto undescribed isotopic event (~7–8 ka) which, on a regional scale, is only identified in eastern Norwegian Sea surface water. This event may be associated with the final pulse of glacier meltwater release from Fennoscandia, which affected the onset of intensified coastal surface water circulation off Norway during a time of regional sea-level rise. All these data indicate that surface water changes are an integral part of deglacial processes in general. Yet, the youngest observed change noted around 3 ka gives evidence that such events with similar effects occur even during the later Holocene when from a climatic point of view relativelystable conditions prevailed. |
format |
Article in Journal/Newspaper |
author |
Bauch, Henning A. Weinelt, Mara S. |
spellingShingle |
Bauch, Henning A. Weinelt, Mara S. Surface water changes in the Norwegian Sea during last deglacial and Holocene times |
author_facet |
Bauch, Henning A. Weinelt, Mara S. |
author_sort |
Bauch, Henning A. |
title |
Surface water changes in the Norwegian Sea during last deglacial and Holocene times |
title_short |
Surface water changes in the Norwegian Sea during last deglacial and Holocene times |
title_full |
Surface water changes in the Norwegian Sea during last deglacial and Holocene times |
title_fullStr |
Surface water changes in the Norwegian Sea during last deglacial and Holocene times |
title_full_unstemmed |
Surface water changes in the Norwegian Sea during last deglacial and Holocene times |
title_sort |
surface water changes in the norwegian sea during last deglacial and holocene times |
publisher |
Elsevier |
publishDate |
1997 |
url |
https://oceanrep.geomar.de/id/eprint/28207/ https://oceanrep.geomar.de/id/eprint/28207/1/1997_Bauch-WeineltMS-Surface_QRS-16.pdf https://doi.org/10.1016/S0277-3791(96)00075-3 |
geographic |
Norway Norwegian Sea |
geographic_facet |
Norway Norwegian Sea |
genre |
Fennoscandia glacier Neogloboquadrina pachyderma Norwegian Sea |
genre_facet |
Fennoscandia glacier Neogloboquadrina pachyderma Norwegian Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/28207/1/1997_Bauch-WeineltMS-Surface_QRS-16.pdf Bauch, H. A. and Weinelt, M. S. (1997) Surface water changes in the Norwegian Sea during last deglacial and Holocene times. Quaternary Science Reviews, 16 (10). pp. 1115-1124. DOI 10.1016/S0277-3791(96)00075-3 <https://doi.org/10.1016/S0277-3791%2896%2900075-3>. doi:10.1016/S0277-3791(96)00075-3 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/S0277-3791(96)00075-3 |
container_title |
Quaternary Science Reviews |
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16 |
container_issue |
10 |
container_start_page |
1115 |
op_container_end_page |
1124 |
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1765997361172054016 |