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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Published in:Climate of the Past
Main Authors: F. Justino, D. Lindemann, F. Kucharski, A. Wilson, D. Bromwich, F. Stordal
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2017
Subjects:
geo
Online Access:https://doi.org/10.5194/cp-13-1081-2017
https://www.clim-past.net/13/1081/2017/cp-13-1081-2017.pdf
https://doaj.org/article/2d1582fa1d314d1a98a598a2f23f5f19
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spelling fttriple:oai:gotriple.eu:oai:doaj.org/article:2d1582fa1d314d1a98a598a2f23f5f19 2023-05-15T13:45:15+02:00 Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial F. Justino D. Lindemann F. Kucharski A. Wilson D. Bromwich F. Stordal 2017-09-01 https://doi.org/10.5194/cp-13-1081-2017 https://www.clim-past.net/13/1081/2017/cp-13-1081-2017.pdf https://doaj.org/article/2d1582fa1d314d1a98a598a2f23f5f19 en eng Copernicus Publications doi:10.5194/cp-13-1081-2017 1814-9324 1814-9332 https://www.clim-past.net/13/1081/2017/cp-13-1081-2017.pdf https://doaj.org/article/2d1582fa1d314d1a98a598a2f23f5f19 undefined Climate of the Past, Vol 13, Pp 1081-1095 (2017) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.5194/cp-13-1081-2017 2023-01-22T18:10:01Z 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 Unknown Antarctic Pacific Weddell Weddell Sea West Antarctic Ice Sheet Climate of the Past 13 9 1081 1095
institution Open Polar
collection Unknown
op_collection_id fttriple
language English
topic geo
envir
spellingShingle geo
envir
F. Justino
D. Lindemann
F. Kucharski
A. Wilson
D. Bromwich
F. Stordal
Oceanic response to changes in the WAIS and astronomical forcing during the MIS31 superinterglacial
topic_facet geo
envir
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 F. Justino
D. Lindemann
F. Kucharski
A. Wilson
D. Bromwich
F. Stordal
author_facet F. Justino
D. Lindemann
F. Kucharski
A. Wilson
D. Bromwich
F. Stordal
author_sort F. Justino
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 Publications
publishDate 2017
url https://doi.org/10.5194/cp-13-1081-2017
https://www.clim-past.net/13/1081/2017/cp-13-1081-2017.pdf
https://doaj.org/article/2d1582fa1d314d1a98a598a2f23f5f19
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 Climate of the Past, Vol 13, Pp 1081-1095 (2017)
op_relation doi:10.5194/cp-13-1081-2017
1814-9324
1814-9332
https://www.clim-past.net/13/1081/2017/cp-13-1081-2017.pdf
https://doaj.org/article/2d1582fa1d314d1a98a598a2f23f5f19
op_rights undefined
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
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