Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports
Recent measurements of the strength of the Atlantic overturning circulation at 26°N show a 1 year drop and partial recovery amid a gradual weakening. To examine the extent and impact of the slowdown on basin wide heat and freshwater transports for 2004–2012, a box model that assimilates hydrographic...
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ftnerc:oai:nora.nerc.ac.uk:514750 2023-05-15T17:32:23+02:00 Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports Kelly, Kathryn A. Drushka, Kyla Thompson, LuAnne Le Bars, Dewi McDonagh, Elaine L. 2016-07-28 text http://nora.nerc.ac.uk/id/eprint/514750/ https://nora.nerc.ac.uk/id/eprint/514750/1/grl54726.pdf https://doi.org/10.1002/2016GL069789 en eng https://nora.nerc.ac.uk/id/eprint/514750/1/grl54726.pdf Kelly, Kathryn A.; Drushka, Kyla; Thompson, LuAnne; Le Bars, Dewi; McDonagh, Elaine L. 2016 Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports. Geophysical Research Letters, 43 (14). 7625-7631. https://doi.org/10.1002/2016GL069789 <https://doi.org/10.1002/2016GL069789> Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1002/2016GL069789 2023-02-04T19:43:40Z Recent measurements of the strength of the Atlantic overturning circulation at 26°N show a 1 year drop and partial recovery amid a gradual weakening. To examine the extent and impact of the slowdown on basin wide heat and freshwater transports for 2004–2012, a box model that assimilates hydrographic and satellite observations is used to estimate heat transport and freshwater convergence as residuals of the heat and freshwater budgets. Using an independent transport estimate, convergences are converted to transports, which show a high level of spatial coherence. The similarity between Atlantic heat transport and the Agulhas Leakage suggests that it is the source of the surface heat transport anomalies. The freshwater budget in the North Atlantic is dominated by a decrease in freshwater flux. The increasing salinity during the slowdown supports modeling studies that show that heat, not freshwater, drives trends in the overturning circulation in a warming climate. Article in Journal/Newspaper North Atlantic Natural Environment Research Council: NERC Open Research Archive Geophysical Research Letters 43 14 7625 7631 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
Recent measurements of the strength of the Atlantic overturning circulation at 26°N show a 1 year drop and partial recovery amid a gradual weakening. To examine the extent and impact of the slowdown on basin wide heat and freshwater transports for 2004–2012, a box model that assimilates hydrographic and satellite observations is used to estimate heat transport and freshwater convergence as residuals of the heat and freshwater budgets. Using an independent transport estimate, convergences are converted to transports, which show a high level of spatial coherence. The similarity between Atlantic heat transport and the Agulhas Leakage suggests that it is the source of the surface heat transport anomalies. The freshwater budget in the North Atlantic is dominated by a decrease in freshwater flux. The increasing salinity during the slowdown supports modeling studies that show that heat, not freshwater, drives trends in the overturning circulation in a warming climate. |
format |
Article in Journal/Newspaper |
author |
Kelly, Kathryn A. Drushka, Kyla Thompson, LuAnne Le Bars, Dewi McDonagh, Elaine L. |
spellingShingle |
Kelly, Kathryn A. Drushka, Kyla Thompson, LuAnne Le Bars, Dewi McDonagh, Elaine L. Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports |
author_facet |
Kelly, Kathryn A. Drushka, Kyla Thompson, LuAnne Le Bars, Dewi McDonagh, Elaine L. |
author_sort |
Kelly, Kathryn A. |
title |
Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports |
title_short |
Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports |
title_full |
Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports |
title_fullStr |
Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports |
title_full_unstemmed |
Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports |
title_sort |
impact of slowdown of atlantic overturning circulation on heat and freshwater transports |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/514750/ https://nora.nerc.ac.uk/id/eprint/514750/1/grl54726.pdf https://doi.org/10.1002/2016GL069789 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/514750/1/grl54726.pdf Kelly, Kathryn A.; Drushka, Kyla; Thompson, LuAnne; Le Bars, Dewi; McDonagh, Elaine L. 2016 Impact of slowdown of Atlantic overturning circulation on heat and freshwater transports. Geophysical Research Letters, 43 (14). 7625-7631. https://doi.org/10.1002/2016GL069789 <https://doi.org/10.1002/2016GL069789> |
op_doi |
https://doi.org/10.1002/2016GL069789 |
container_title |
Geophysical Research Letters |
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43 |
container_issue |
14 |
container_start_page |
7625 |
op_container_end_page |
7631 |
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1766130475412226048 |