The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum
A NCAR-CCSM3 (National Center for Atmospheric Research – Community Climate System Model version 3) state-of-the-art transient paleoclimate simulation with prescribed freshwater inflows is used to investigate the changes and evolution of the South Atlantic water mass structure from the Last Glacial M...
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Online Access: | https://doi.org/10.5194/cp-10-1723-2014 https://doaj.org/article/d38759908e8c4a019b4e4de3d5dee039 |
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ftdoajarticles:oai:doaj.org/article:d38759908e8c4a019b4e4de3d5dee039 2023-05-15T13:59:22+02:00 The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum J. M. Marson I. Wainer M. M. Mata Z. Liu 2014-09-01T00:00:00Z https://doi.org/10.5194/cp-10-1723-2014 https://doaj.org/article/d38759908e8c4a019b4e4de3d5dee039 EN eng Copernicus Publications http://www.clim-past.net/10/1723/2014/cp-10-1723-2014.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-10-1723-2014 https://doaj.org/article/d38759908e8c4a019b4e4de3d5dee039 Climate of the Past, Vol 10, Iss 5, Pp 1723-1734 (2014) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2014 ftdoajarticles https://doi.org/10.5194/cp-10-1723-2014 2022-12-31T10:27:49Z A NCAR-CCSM3 (National Center for Atmospheric Research – Community Climate System Model version 3) state-of-the-art transient paleoclimate simulation with prescribed freshwater inflows is used to investigate the changes and evolution of the South Atlantic water mass structure from the Last Glacial Maximum (LGM) to the present day. Model results show that 21 000 yr ago the water column was substantially stratified due to the presence of a saltier-than-today Antarctic Bottom Water (AABW), forming a salinity barrier that prevented dense waters from the Northern Hemisphere from sinking. This salinity barrier started to erode after the termination of the Heinrich event 1, when its associated meltwater was transported southward, freshening the AABW. The removal of the barrier after 14 ka triggered the production of the North Atlantic Deep Water (NADW), which spread into the deeper layers of the South Atlantic at the onset of the Holocene. At this point, the NADW acquired its modern-day structure, establishing a deeper Atlantic meridional overturning circulation (AMOC). Article in Journal/Newspaper Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic South Atlantic Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Climate of the Past 10 5 1723 1734 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 J. M. Marson I. Wainer M. M. Mata Z. Liu The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
A NCAR-CCSM3 (National Center for Atmospheric Research – Community Climate System Model version 3) state-of-the-art transient paleoclimate simulation with prescribed freshwater inflows is used to investigate the changes and evolution of the South Atlantic water mass structure from the Last Glacial Maximum (LGM) to the present day. Model results show that 21 000 yr ago the water column was substantially stratified due to the presence of a saltier-than-today Antarctic Bottom Water (AABW), forming a salinity barrier that prevented dense waters from the Northern Hemisphere from sinking. This salinity barrier started to erode after the termination of the Heinrich event 1, when its associated meltwater was transported southward, freshening the AABW. The removal of the barrier after 14 ka triggered the production of the North Atlantic Deep Water (NADW), which spread into the deeper layers of the South Atlantic at the onset of the Holocene. At this point, the NADW acquired its modern-day structure, establishing a deeper Atlantic meridional overturning circulation (AMOC). |
format |
Article in Journal/Newspaper |
author |
J. M. Marson I. Wainer M. M. Mata Z. Liu |
author_facet |
J. M. Marson I. Wainer M. M. Mata Z. Liu |
author_sort |
J. M. Marson |
title |
The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum |
title_short |
The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum |
title_full |
The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum |
title_fullStr |
The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum |
title_full_unstemmed |
The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum |
title_sort |
impacts of deglacial meltwater forcing on the south atlantic ocean deep circulation since the last glacial maximum |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/cp-10-1723-2014 https://doaj.org/article/d38759908e8c4a019b4e4de3d5dee039 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic South Atlantic Ocean |
genre_facet |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic South Atlantic Ocean |
op_source |
Climate of the Past, Vol 10, Iss 5, Pp 1723-1734 (2014) |
op_relation |
http://www.clim-past.net/10/1723/2014/cp-10-1723-2014.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-10-1723-2014 https://doaj.org/article/d38759908e8c4a019b4e4de3d5dee039 |
op_doi |
https://doi.org/10.5194/cp-10-1723-2014 |
container_title |
Climate of the Past |
container_volume |
10 |
container_issue |
5 |
container_start_page |
1723 |
op_container_end_page |
1734 |
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1766267909705826304 |