Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity
Based on coupled model simulations (ECBilt-Clio), we investigate the atmospheric and oceanic response to sustained freshwater input into the North Atlantic under the glacial maximum background state. The results demonstrate that a weakening of the thermohaline circulation triggered by weaker density...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Sociedade Brasileira de Meteorologia
2010
|
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-77862010000100009 |
id |
ftjscielo:oai:scielo:S0102-77862010000100009 |
---|---|
record_format |
openpolar |
spelling |
ftjscielo:oai:scielo:S0102-77862010000100009 2023-05-15T17:13:50+02:00 Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity Justino,Flávio Barbosa Machado,Jeferson Prietsch 2010-03-01 text/html http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-77862010000100009 en eng Sociedade Brasileira de Meteorologia Revista Brasileira de Meteorologia v.25 n.1 2010 Thermohaline circulation climate changes baroclinic activity journal article 2010 ftjscielo 2015-10-26T20:18:06Z Based on coupled model simulations (ECBilt-Clio), we investigate the atmospheric and oceanic response to sustained freshwater input into the North Atlantic under the glacial maximum background state. The results demonstrate that a weakening of the thermohaline circulation triggered by weaker density flux leads to rapid changes in global sea-ice volume and reduced poleward heat transport in the Northern Hemisphere (NH). In the Southern Hemisphere (SH), however, the oceanic heat transport increases substantially. This in turn leads to strong cooling over the North Atlantic whereas the SH extratropical region warms up. The suppression of the NADW also drastically changes the atmospheric circulation. The associated northward wind anomalies over the North Atlantic increase the warm air advection from the tropics and induce the transport of tropical saltier water to mid-latitudes. This negative atmospheric-oceanic feedback should play an important role to resume the NADW, after the freshwater forcing ends up. Article in Journal/Newspaper NADW North Atlantic Sea ice SciELO Brazil (Scientific Electronic Library Online) |
institution |
Open Polar |
collection |
SciELO Brazil (Scientific Electronic Library Online) |
op_collection_id |
ftjscielo |
language |
English |
topic |
Thermohaline circulation climate changes baroclinic activity |
spellingShingle |
Thermohaline circulation climate changes baroclinic activity Justino,Flávio Barbosa Machado,Jeferson Prietsch Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity |
topic_facet |
Thermohaline circulation climate changes baroclinic activity |
description |
Based on coupled model simulations (ECBilt-Clio), we investigate the atmospheric and oceanic response to sustained freshwater input into the North Atlantic under the glacial maximum background state. The results demonstrate that a weakening of the thermohaline circulation triggered by weaker density flux leads to rapid changes in global sea-ice volume and reduced poleward heat transport in the Northern Hemisphere (NH). In the Southern Hemisphere (SH), however, the oceanic heat transport increases substantially. This in turn leads to strong cooling over the North Atlantic whereas the SH extratropical region warms up. The suppression of the NADW also drastically changes the atmospheric circulation. The associated northward wind anomalies over the North Atlantic increase the warm air advection from the tropics and induce the transport of tropical saltier water to mid-latitudes. This negative atmospheric-oceanic feedback should play an important role to resume the NADW, after the freshwater forcing ends up. |
format |
Article in Journal/Newspaper |
author |
Justino,Flávio Barbosa Machado,Jeferson Prietsch |
author_facet |
Justino,Flávio Barbosa Machado,Jeferson Prietsch |
author_sort |
Justino,Flávio Barbosa |
title |
Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity |
title_short |
Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity |
title_full |
Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity |
title_fullStr |
Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity |
title_full_unstemmed |
Climate feedbacks induced by the North Atlantic freshwater forcing in a coupled model of intermediate complexity |
title_sort |
climate feedbacks induced by the north atlantic freshwater forcing in a coupled model of intermediate complexity |
publisher |
Sociedade Brasileira de Meteorologia |
publishDate |
2010 |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-77862010000100009 |
genre |
NADW North Atlantic Sea ice |
genre_facet |
NADW North Atlantic Sea ice |
op_source |
Revista Brasileira de Meteorologia v.25 n.1 2010 |
_version_ |
1766071022206844928 |