Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development
EGU2012-5919 Using multi-proxy sediment records from two distant sites in the North Atlantic and the Nordic Seas, surface and bottom water changes were investigated over the past 135 ka with special emphasis on the last and present interglacial (Eemian and Holocene). The two interglacials exhibit a...
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Online Access: | https://oceanrep.geomar.de/id/eprint/20665/ https://oceanrep.geomar.de/id/eprint/20665/1/2012_BauchH_EGU2012-5919.pdf http://meetingorganizer.copernicus.org/EGU2012/EGU2012-5919.pdf |
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ftoceanrep:oai:oceanrep.geomar.de:20665 2023-05-15T14:59:16+02:00 Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development Bauch, Henning A. 2012 text https://oceanrep.geomar.de/id/eprint/20665/ https://oceanrep.geomar.de/id/eprint/20665/1/2012_BauchH_EGU2012-5919.pdf http://meetingorganizer.copernicus.org/EGU2012/EGU2012-5919.pdf en eng Copernicus Publications https://oceanrep.geomar.de/id/eprint/20665/1/2012_BauchH_EGU2012-5919.pdf Bauch, H. A. (2012) Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development. [Talk] In: EGU General Assembly 2012. , 22.04.-27.04.2012, Vienna, Austria . Geophysical Research Letters. . cc_by Conference or Workshop Item NonPeerReviewed 2012 ftoceanrep 2023-04-07T15:08:07Z EGU2012-5919 Using multi-proxy sediment records from two distant sites in the North Atlantic and the Nordic Seas, surface and bottom water changes were investigated over the past 135 ka with special emphasis on the last and present interglacial (Eemian and Holocene). The two interglacials exhibit a very similar developing structure during each preceding deglaciation (TI and TII) in the Nordic Seas by showing a pronounced cold–warm–cold variability. Like TI, also TII experienced a Younger-Dryas-like cold reversal (YDII), a preceding Bølling/Allerød-like (B/AII) and a H-event (H11). But unlike TI, the cold events during TII were associated with intermittent invasions of an Atlantic faunal component (Beella megastoma) which underscores a northward penetration of mid-latitude waters at the subsurface leaving a vertical water mass structure in the North which differed from that of TI. Very likely, this difference also affected the subsequent oceanic development because the main interglacials that followed not only reveal a regional antiphase, intra-interglacial behavior of peak ocean warmth between each other, they also verify strong contrasts in surface ocean hydrography. Moreover, colder Eemian than Holocene temperatures are noted in the Nordic Seas, and vice versa in the North Atlantic. A reduced intensity of Atlantic ocean heat transfer to the Arctic is therefore inferred for the Eemian, thus arguing for a reassessment of current Arctic paleoclimate models and a better reconciliation with empirical field data. Conference Object Arctic Nordic Seas North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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English |
description |
EGU2012-5919 Using multi-proxy sediment records from two distant sites in the North Atlantic and the Nordic Seas, surface and bottom water changes were investigated over the past 135 ka with special emphasis on the last and present interglacial (Eemian and Holocene). The two interglacials exhibit a very similar developing structure during each preceding deglaciation (TI and TII) in the Nordic Seas by showing a pronounced cold–warm–cold variability. Like TI, also TII experienced a Younger-Dryas-like cold reversal (YDII), a preceding Bølling/Allerød-like (B/AII) and a H-event (H11). But unlike TI, the cold events during TII were associated with intermittent invasions of an Atlantic faunal component (Beella megastoma) which underscores a northward penetration of mid-latitude waters at the subsurface leaving a vertical water mass structure in the North which differed from that of TI. Very likely, this difference also affected the subsequent oceanic development because the main interglacials that followed not only reveal a regional antiphase, intra-interglacial behavior of peak ocean warmth between each other, they also verify strong contrasts in surface ocean hydrography. Moreover, colder Eemian than Holocene temperatures are noted in the Nordic Seas, and vice versa in the North Atlantic. A reduced intensity of Atlantic ocean heat transfer to the Arctic is therefore inferred for the Eemian, thus arguing for a reassessment of current Arctic paleoclimate models and a better reconciliation with empirical field data. |
format |
Conference Object |
author |
Bauch, Henning A. |
spellingShingle |
Bauch, Henning A. Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development |
author_facet |
Bauch, Henning A. |
author_sort |
Bauch, Henning A. |
title |
Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development |
title_short |
Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development |
title_full |
Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development |
title_fullStr |
Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development |
title_full_unstemmed |
Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development |
title_sort |
deglacial subsurface injections of atlantic water into the nordic seas and its effect on interglacial climate development |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://oceanrep.geomar.de/id/eprint/20665/ https://oceanrep.geomar.de/id/eprint/20665/1/2012_BauchH_EGU2012-5919.pdf http://meetingorganizer.copernicus.org/EGU2012/EGU2012-5919.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Nordic Seas North Atlantic |
genre_facet |
Arctic Nordic Seas North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/20665/1/2012_BauchH_EGU2012-5919.pdf Bauch, H. A. (2012) Deglacial subsurface injections of Atlantic water into the Nordic Seas and its effect on interglacial climate development. [Talk] In: EGU General Assembly 2012. , 22.04.-27.04.2012, Vienna, Austria . Geophysical Research Letters. . |
op_rights |
cc_by |
_version_ |
1766331385464750080 |