Ocean circulation and climate at the Eemian and last glacial inception
Combining a hierarchy of climate models of varying complexity with marine proxy data, we show that the North Atlantic surface circulation played an important role for the climate of the Eemian and the last glacial inception. As insolation decreases, increasing Arctic sea ice export causes a freshwat...
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Language: | English |
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The University of Bergen
2010
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ftunivbergen:oai:bora.uib.no:1956/4436 2023-05-15T15:04:29+02:00 Ocean circulation and climate at the Eemian and last glacial inception Born, Andreas 2010-09-24 application/pdf https://hdl.handle.net/1956/4436 eng eng The University of Bergen Paper I: Climate Dynamics 35(7-8), Born, A.; K. H. Nisancioglu and P. Braconnot, Sea ice induced changes in ocean circulation during the Eemian, pp.1361–1371. Published version. Copyright 2010 Springer. Full text not available in BORA due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1007/s00382-009-0709-2 Paper II: Born, A.; K. H. Nisancioglu, B. Risebrobakken and A. Levermann (2010), Late Eemian warming in the Nordic Seas as seen in proxy data and climate models. Accepted version. In revision for publishing in Paleoceanography. Full text not available in BORA. Paper III: Climate of the Past Discussions 6, Born, A.; M. Kageyama and K. H. Nisancioglu, Warm Nordic Seas delayed glacial inception in Scandinavia, pp.1503–1523. Published version available at: http://dx.doi.org/10.5194/cp-6-817-2010 Submitted version. Copyright 2010 Born et. al. Submitted to Climate of the Past 6, pp. 817-826. Published by Copernicus Publications. This work is distributed under the Creative Commons Attribution 3.0 License. Paper IV: Geochemistry Geophysics Geosystems 11, Q06011, Born, A. and A. Levermann, The 8.2 ka event: abrupt transition of the subpolar gyre toward a modern North Atlantic circulation, 8 pp. Published version. Copyright 2010 American Geophysical Union. All rights reserved. Reproduced with permission. http://dx.doi.org/10.1029/2009GC003024 Paper V: Climate Dynamics, Montoya, M.; A. Born and A. Levermann, Reversed North Atlantic gyre dynamics in present and glacial climate. Accepted version. Copyright 2010 Springer. Reproduced with permission. The published version is available at: http://dx.doi.org/10.1007/s00382-009-0729-y Paper VI: Born, A. and J. Mignot (2010), The Atlantic subpolar gyre as a stochastically forced oscillator. Draft version. Full text not available in BORA. urn:isbn:978-82-308-1606-6 (print version) https://hdl.handle.net/1956/4436 The author Copyright the author. All rights reserved VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 Doctoral thesis 2010 ftunivbergen https://doi.org/10.1007/s00382-009-0709-210.5194/cp-6-817-201010.1029/2009GC00302410.1007/s00382-009-0729-y 2023-03-14T17:41:21Z Combining a hierarchy of climate models of varying complexity with marine proxy data, we show that the North Atlantic surface circulation played an important role for the climate of the Eemian and the last glacial inception. As insolation decreases, increasing Arctic sea ice export causes a freshwater transport into the subpolar North Atlantic. Amplified by a nonlinear response of the subpolar gyre this leads to a reorganization of the surface currents and a stronger heat transport into the Nordic Seas. The resulting warming of this region delayed Scandinavian inception. This work introduces a relatively new concept into the field of paleoceanography: the subpolar gyre as an active component of the climate system. This is based on recent advances in physical oceanography and allows for a new and physically consistent interpretation of proxy data. Moreover, the sensitivity of the subpolar gyre to different boundary conditions is discussed, improving the understanding of the underlying mechanism. Doctoral or Postdoctoral Thesis Arctic Nordic Seas North Atlantic Sea ice University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Climate Dynamics 35 7-8 1361 1371 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 Born, Andreas Ocean circulation and climate at the Eemian and last glacial inception |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 |
description |
Combining a hierarchy of climate models of varying complexity with marine proxy data, we show that the North Atlantic surface circulation played an important role for the climate of the Eemian and the last glacial inception. As insolation decreases, increasing Arctic sea ice export causes a freshwater transport into the subpolar North Atlantic. Amplified by a nonlinear response of the subpolar gyre this leads to a reorganization of the surface currents and a stronger heat transport into the Nordic Seas. The resulting warming of this region delayed Scandinavian inception. This work introduces a relatively new concept into the field of paleoceanography: the subpolar gyre as an active component of the climate system. This is based on recent advances in physical oceanography and allows for a new and physically consistent interpretation of proxy data. Moreover, the sensitivity of the subpolar gyre to different boundary conditions is discussed, improving the understanding of the underlying mechanism. |
format |
Doctoral or Postdoctoral Thesis |
author |
Born, Andreas |
author_facet |
Born, Andreas |
author_sort |
Born, Andreas |
title |
Ocean circulation and climate at the Eemian and last glacial inception |
title_short |
Ocean circulation and climate at the Eemian and last glacial inception |
title_full |
Ocean circulation and climate at the Eemian and last glacial inception |
title_fullStr |
Ocean circulation and climate at the Eemian and last glacial inception |
title_full_unstemmed |
Ocean circulation and climate at the Eemian and last glacial inception |
title_sort |
ocean circulation and climate at the eemian and last glacial inception |
publisher |
The University of Bergen |
publishDate |
2010 |
url |
https://hdl.handle.net/1956/4436 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Nordic Seas North Atlantic Sea ice |
genre_facet |
Arctic Nordic Seas North Atlantic Sea ice |
op_relation |
Paper I: Climate Dynamics 35(7-8), Born, A.; K. H. Nisancioglu and P. Braconnot, Sea ice induced changes in ocean circulation during the Eemian, pp.1361–1371. Published version. Copyright 2010 Springer. Full text not available in BORA due to publisher restrictions. The published version is available at: http://dx.doi.org/10.1007/s00382-009-0709-2 Paper II: Born, A.; K. H. Nisancioglu, B. Risebrobakken and A. Levermann (2010), Late Eemian warming in the Nordic Seas as seen in proxy data and climate models. Accepted version. In revision for publishing in Paleoceanography. Full text not available in BORA. Paper III: Climate of the Past Discussions 6, Born, A.; M. Kageyama and K. H. Nisancioglu, Warm Nordic Seas delayed glacial inception in Scandinavia, pp.1503–1523. Published version available at: http://dx.doi.org/10.5194/cp-6-817-2010 Submitted version. Copyright 2010 Born et. al. Submitted to Climate of the Past 6, pp. 817-826. Published by Copernicus Publications. This work is distributed under the Creative Commons Attribution 3.0 License. Paper IV: Geochemistry Geophysics Geosystems 11, Q06011, Born, A. and A. Levermann, The 8.2 ka event: abrupt transition of the subpolar gyre toward a modern North Atlantic circulation, 8 pp. Published version. Copyright 2010 American Geophysical Union. All rights reserved. Reproduced with permission. http://dx.doi.org/10.1029/2009GC003024 Paper V: Climate Dynamics, Montoya, M.; A. Born and A. Levermann, Reversed North Atlantic gyre dynamics in present and glacial climate. Accepted version. Copyright 2010 Springer. Reproduced with permission. The published version is available at: http://dx.doi.org/10.1007/s00382-009-0729-y Paper VI: Born, A. and J. Mignot (2010), The Atlantic subpolar gyre as a stochastically forced oscillator. Draft version. Full text not available in BORA. urn:isbn:978-82-308-1606-6 (print version) https://hdl.handle.net/1956/4436 |
op_rights |
The author Copyright the author. All rights reserved |
op_doi |
https://doi.org/10.1007/s00382-009-0709-210.5194/cp-6-817-201010.1029/2009GC00302410.1007/s00382-009-0729-y |
container_title |
Climate Dynamics |
container_volume |
35 |
container_issue |
7-8 |
container_start_page |
1361 |
op_container_end_page |
1371 |
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1766336249442861056 |