Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation
The Atlantic Meridional Overturning Circulation (AMOC) is an important component of ocean thermohaline circulation. Melting of Greenland’s ice sheet is freshening the North Atlantic; however, whether the augmented freshwater flux is disrupting the AMOC is unclear. Dense Labrador Sea Water (LSW), for...
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ftunisfloridatam:oai:digitalcommons.usf.edu:geo_facpub-2094 2023-05-15T15:04:01+02:00 Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation Yang, Qian Dixon, Tim Myers, Paul G. Bonin, Jennifer Chambers, Don van den Broeke, M.R. Ribergaard, Mads H. Mortensen, John 2016-01-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/geo_facpub/1094 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2094&context=geo_facpub unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/geo_facpub/1094 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2094&context=geo_facpub http://creativecommons.org/licenses/by/4.0/ CC-BY School of Geosciences Faculty and Staff Publications Physical oceanography Earth Sciences Geology Marine Biology article 2016 ftunisfloridatam 2021-10-09T07:44:33Z The Atlantic Meridional Overturning Circulation (AMOC) is an important component of ocean thermohaline circulation. Melting of Greenland’s ice sheet is freshening the North Atlantic; however, whether the augmented freshwater flux is disrupting the AMOC is unclear. Dense Labrador Sea Water (LSW), formed by winter cooling of saline North Atlantic water and subsequent convection, is a key component of the deep southward return flow of the AMOC. Although LSW formation recently decreased, it also reached historically high values in the mid-1990s, making the connection to the freshwater flux unclear. Here we derive a new estimate of the recent freshwater flux from Greenland using updated GRACE satellite data, present new flux estimates for heat and salt from the North Atlantic into the Labrador Sea and explain recent variations in LSW formation. We suggest that changes in LSW can be directly linked to recent freshening, and suggest a possible link to AMOC weakening. Article in Journal/Newspaper Arctic Greenland Ice Sheet Labrador Sea North Atlantic Digital Commons University of South Florida (USF) Arctic Greenland |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
Physical oceanography Earth Sciences Geology Marine Biology |
spellingShingle |
Physical oceanography Earth Sciences Geology Marine Biology Yang, Qian Dixon, Tim Myers, Paul G. Bonin, Jennifer Chambers, Don van den Broeke, M.R. Ribergaard, Mads H. Mortensen, John Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation |
topic_facet |
Physical oceanography Earth Sciences Geology Marine Biology |
description |
The Atlantic Meridional Overturning Circulation (AMOC) is an important component of ocean thermohaline circulation. Melting of Greenland’s ice sheet is freshening the North Atlantic; however, whether the augmented freshwater flux is disrupting the AMOC is unclear. Dense Labrador Sea Water (LSW), formed by winter cooling of saline North Atlantic water and subsequent convection, is a key component of the deep southward return flow of the AMOC. Although LSW formation recently decreased, it also reached historically high values in the mid-1990s, making the connection to the freshwater flux unclear. Here we derive a new estimate of the recent freshwater flux from Greenland using updated GRACE satellite data, present new flux estimates for heat and salt from the North Atlantic into the Labrador Sea and explain recent variations in LSW formation. We suggest that changes in LSW can be directly linked to recent freshening, and suggest a possible link to AMOC weakening. |
format |
Article in Journal/Newspaper |
author |
Yang, Qian Dixon, Tim Myers, Paul G. Bonin, Jennifer Chambers, Don van den Broeke, M.R. Ribergaard, Mads H. Mortensen, John |
author_facet |
Yang, Qian Dixon, Tim Myers, Paul G. Bonin, Jennifer Chambers, Don van den Broeke, M.R. Ribergaard, Mads H. Mortensen, John |
author_sort |
Yang, Qian |
title |
Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation |
title_short |
Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation |
title_full |
Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation |
title_fullStr |
Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation |
title_full_unstemmed |
Recent Increases in Arctic Freshwater Flux Affects Labrador Sea Convection and Atlantic Overturning Circulation |
title_sort |
recent increases in arctic freshwater flux affects labrador sea convection and atlantic overturning circulation |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2016 |
url |
https://digitalcommons.usf.edu/geo_facpub/1094 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2094&context=geo_facpub |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet Labrador Sea North Atlantic |
genre_facet |
Arctic Greenland Ice Sheet Labrador Sea North Atlantic |
op_source |
School of Geosciences Faculty and Staff Publications |
op_relation |
https://digitalcommons.usf.edu/geo_facpub/1094 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2094&context=geo_facpub |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766335850825646080 |