Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial
Marine Isotope Stage 31 (MIS31, between 1085 and 1055 ka) was characterized by higher extratropical air temperatures and a substantial recession of polar glaciers compared to today. Paleoreconstructions and model simulations have increased the understanding of the MIS31 interval, but questions remai...
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ftoslouniv:oai:www.duo.uio.no:10852/62157 2023-05-15T13:46:09+02:00 Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial Justino, Flavio Lindemann, Douglas Kucharski, Fred Wilson, Aaron Bromwich, David Stordal, Frode 2017-11-13T13:10:48Z http://hdl.handle.net/10852/62157 http://urn.nb.no/URN:NBN:no-64752 https://doi.org/10.5194/cp-13-1081-2017 EN eng Copernicus NOTUR/NORSTORE/NN2806K http://urn.nb.no/URN:NBN:no-64752 Justino, Flavio Lindemann, Douglas Kucharski, Fred Wilson, Aaron Bromwich, David Stordal, Frode . Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial. Climate of the Past. 2017, 13(9), 1081-1095 http://hdl.handle.net/10852/62157 1513476 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Climate of the Past&rft.volume=13&rft.spage=1081&rft.date=2017 Climate of the Past 13 9 1081 1095 http://dx.doi.org/10.5194/cp-13-1081-2017 URN:NBN:no-64752 Fulltext https://www.duo.uio.no/bitstream/handle/10852/62157/1/cp-13-1081-2017.pdf Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ CC-BY 1814-9324 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2017 ftoslouniv https://doi.org/10.5194/cp-13-1081-2017 2020-06-21T08:51:46Z Marine Isotope Stage 31 (MIS31, between 1085 and 1055 ka) was characterized by higher extratropical air temperatures and a substantial recession of polar glaciers compared to today. Paleoreconstructions and model simulations have increased the understanding of the MIS31 interval, but questions remain regarding the role of the Atlantic and Pacific oceans in modifying the climate associated with the variations in Earth's orbital parameters. Multi-century coupled climate simulations, with the astronomical configuration of the MIS31 and modified West Antarctic Ice Sheet (WAIS) topography, show an increase in the thermohaline flux and northward oceanic heat transport (OHT) in the Pacific Ocean. These oceanic changes are driven by anomalous atmospheric circulation and increased surface salinity in concert with a stronger meridional overturning circulation (MOC). The intensified northward OHT is responsible for up to 85 % of the global OHT anomalies and contributes to the overall reduction in sea ice in the Northern Hemisphere (NH) due to Earth's astronomical configuration. The relative contributions of the Atlantic Ocean to global OHT and MOC anomalies are minor compared to those of the Pacific. However, sea ice changes are remarkable, highlighted by decreased (increased) cover in the Ross (Weddell) Sea but widespread reductions in sea ice across the NH. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Sea ice Weddell Sea Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Antarctic Pacific Weddell Weddell Sea West Antarctic Ice Sheet Climate of the Past 13 9 1081 1095 |
institution |
Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Marine Isotope Stage 31 (MIS31, between 1085 and 1055 ka) was characterized by higher extratropical air temperatures and a substantial recession of polar glaciers compared to today. Paleoreconstructions and model simulations have increased the understanding of the MIS31 interval, but questions remain regarding the role of the Atlantic and Pacific oceans in modifying the climate associated with the variations in Earth's orbital parameters. Multi-century coupled climate simulations, with the astronomical configuration of the MIS31 and modified West Antarctic Ice Sheet (WAIS) topography, show an increase in the thermohaline flux and northward oceanic heat transport (OHT) in the Pacific Ocean. These oceanic changes are driven by anomalous atmospheric circulation and increased surface salinity in concert with a stronger meridional overturning circulation (MOC). The intensified northward OHT is responsible for up to 85 % of the global OHT anomalies and contributes to the overall reduction in sea ice in the Northern Hemisphere (NH) due to Earth's astronomical configuration. The relative contributions of the Atlantic Ocean to global OHT and MOC anomalies are minor compared to those of the Pacific. However, sea ice changes are remarkable, highlighted by decreased (increased) cover in the Ross (Weddell) Sea but widespread reductions in sea ice across the NH. |
format |
Article in Journal/Newspaper |
author |
Justino, Flavio Lindemann, Douglas Kucharski, Fred Wilson, Aaron Bromwich, David Stordal, Frode |
spellingShingle |
Justino, Flavio Lindemann, Douglas Kucharski, Fred Wilson, Aaron Bromwich, David Stordal, Frode Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial |
author_facet |
Justino, Flavio Lindemann, Douglas Kucharski, Fred Wilson, Aaron Bromwich, David Stordal, Frode |
author_sort |
Justino, Flavio |
title |
Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial |
title_short |
Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial |
title_full |
Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial |
title_fullStr |
Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial |
title_full_unstemmed |
Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial |
title_sort |
oceanic response to changes in the wais and astronomical forcing during the mis31 superinterglacial |
publisher |
Copernicus |
publishDate |
2017 |
url |
http://hdl.handle.net/10852/62157 http://urn.nb.no/URN:NBN:no-64752 https://doi.org/10.5194/cp-13-1081-2017 |
geographic |
Antarctic Pacific Weddell Weddell Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Pacific Weddell Weddell Sea West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Sea ice Weddell Sea |
op_source |
1814-9324 |
op_relation |
NOTUR/NORSTORE/NN2806K http://urn.nb.no/URN:NBN:no-64752 Justino, Flavio Lindemann, Douglas Kucharski, Fred Wilson, Aaron Bromwich, David Stordal, Frode . Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial. Climate of the Past. 2017, 13(9), 1081-1095 http://hdl.handle.net/10852/62157 1513476 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Climate of the Past&rft.volume=13&rft.spage=1081&rft.date=2017 Climate of the Past 13 9 1081 1095 http://dx.doi.org/10.5194/cp-13-1081-2017 URN:NBN:no-64752 Fulltext https://www.duo.uio.no/bitstream/handle/10852/62157/1/cp-13-1081-2017.pdf |
op_rights |
Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-13-1081-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
9 |
container_start_page |
1081 |
op_container_end_page |
1095 |
_version_ |
1766237809126932480 |