A late medieval warm period in the Southern Ocean as a delayed response to external forcing?
On the basis of long simulations performed with a three-dimensional climate model, we propose an interhemispheric climate lag mechanism, involving the long-term memory of deepwater masses. Warm anomalies, formed in the North Atlantic when warm conditions prevail at surface, are transported by the de...
Published in: | Geophysical Research Letters |
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Online Access: | http://hdl.handle.net/2078.1/40298 https://doi.org/10.1029/2003GL019140 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:40298 2024-05-12T08:07:54+00:00 A late medieval warm period in the Southern Ocean as a delayed response to external forcing? Goosse, Hugues Masson-Delmotte, V. Renssen, H. Delmotte, M. Fichefet, Thierry Morgan, V van Ommen, T Khim, BK Stenni, B UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate 2004 http://hdl.handle.net/2078.1/40298 https://doi.org/10.1029/2003GL019140 eng eng Amer Geophysical Union boreal:40298 http://hdl.handle.net/2078.1/40298 doi:10.1029/2003GL019140 urn:ISSN:0094-8276 urn:EISSN:1944-8007 Geophysical Research Letters, Vol. 31, no. 6 (2004) info:eu-repo/semantics/article 2004 ftunistlouisbrus https://doi.org/10.1029/2003GL019140 2024-04-18T18:14:53Z On the basis of long simulations performed with a three-dimensional climate model, we propose an interhemispheric climate lag mechanism, involving the long-term memory of deepwater masses. Warm anomalies, formed in the North Atlantic when warm conditions prevail at surface, are transported by the deep ocean circulation towards the Southern Ocean. There, the heat is released because of large scale upwelling, maintaining warm conditions and inducing a lagged response of about 150 years compared to the Northern Hemisphere. Model results and observations covering the first half of the second millenium suggest a delay between the temperature evolution in the Northern Hemisphere and in the Southern Ocean. The mechanism described here provides a reasonable hypothesis to explain such an interhemipsheric lag. Article in Journal/Newspaper North Atlantic Southern Ocean DIAL@USL-B (Université Saint-Louis, Bruxelles) Southern Ocean Geophysical Research Letters 31 6 n/a n/a |
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Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
description |
On the basis of long simulations performed with a three-dimensional climate model, we propose an interhemispheric climate lag mechanism, involving the long-term memory of deepwater masses. Warm anomalies, formed in the North Atlantic when warm conditions prevail at surface, are transported by the deep ocean circulation towards the Southern Ocean. There, the heat is released because of large scale upwelling, maintaining warm conditions and inducing a lagged response of about 150 years compared to the Northern Hemisphere. Model results and observations covering the first half of the second millenium suggest a delay between the temperature evolution in the Northern Hemisphere and in the Southern Ocean. The mechanism described here provides a reasonable hypothesis to explain such an interhemipsheric lag. |
author2 |
UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Goosse, Hugues Masson-Delmotte, V. Renssen, H. Delmotte, M. Fichefet, Thierry Morgan, V van Ommen, T Khim, BK Stenni, B |
spellingShingle |
Goosse, Hugues Masson-Delmotte, V. Renssen, H. Delmotte, M. Fichefet, Thierry Morgan, V van Ommen, T Khim, BK Stenni, B A late medieval warm period in the Southern Ocean as a delayed response to external forcing? |
author_facet |
Goosse, Hugues Masson-Delmotte, V. Renssen, H. Delmotte, M. Fichefet, Thierry Morgan, V van Ommen, T Khim, BK Stenni, B |
author_sort |
Goosse, Hugues |
title |
A late medieval warm period in the Southern Ocean as a delayed response to external forcing? |
title_short |
A late medieval warm period in the Southern Ocean as a delayed response to external forcing? |
title_full |
A late medieval warm period in the Southern Ocean as a delayed response to external forcing? |
title_fullStr |
A late medieval warm period in the Southern Ocean as a delayed response to external forcing? |
title_full_unstemmed |
A late medieval warm period in the Southern Ocean as a delayed response to external forcing? |
title_sort |
late medieval warm period in the southern ocean as a delayed response to external forcing? |
publisher |
Amer Geophysical Union |
publishDate |
2004 |
url |
http://hdl.handle.net/2078.1/40298 https://doi.org/10.1029/2003GL019140 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Geophysical Research Letters, Vol. 31, no. 6 (2004) |
op_relation |
boreal:40298 http://hdl.handle.net/2078.1/40298 doi:10.1029/2003GL019140 urn:ISSN:0094-8276 urn:EISSN:1944-8007 |
op_doi |
https://doi.org/10.1029/2003GL019140 |
container_title |
Geophysical Research Letters |
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31 |
container_issue |
6 |
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1798850720581025792 |