Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity
The relationship between Atlantic meridional overturning circulation (AMOC) variability and high-latitude North Atlantic buoyancy changes is complicated by the latter both driving, and responding to, AMOC changes. A maximum covariance analysis applied to a 1,201-year preindustrial control simulation...
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Online Access: | https://escholarship.org/uc/item/9bk973wd https://escholarship.org/content/qt9bk973wd/qt9bk973wd.pdf https://doi.org/10.1029/2021gl093496 |
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ftcdlib:oai:escholarship.org:ark:/13030/qt9bk973wd 2024-09-15T18:20:46+00:00 Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity Chiang, JCH Cheng, W Kim, WM Kim, S 2021-07-28 application/pdf https://escholarship.org/uc/item/9bk973wd https://escholarship.org/content/qt9bk973wd/qt9bk973wd.pdf https://doi.org/10.1029/2021gl093496 unknown eScholarship, University of California qt9bk973wd https://escholarship.org/uc/item/9bk973wd https://escholarship.org/content/qt9bk973wd/qt9bk973wd.pdf doi:10.1029/2021gl093496 public Geophysical Research Letters, vol 48, iss 14 Climate Action Life Below Water Meteorology & Atmospheric Sciences article 2021 ftcdlib https://doi.org/10.1029/2021gl093496 2024-06-28T06:28:20Z The relationship between Atlantic meridional overturning circulation (AMOC) variability and high-latitude North Atlantic buoyancy changes is complicated by the latter both driving, and responding to, AMOC changes. A maximum covariance analysis applied to a 1,201-year preindustrial control simulation reveals two leading modes that separate these two distinct roles of North Atlantic temperature and salinity as related to AMOC variability. A linear combination of the two modes accounts for most of the variation of a widely used AMOC index. The same analysis applied to another control simulation known to possess two distinct regimes of AMOC variability—oscillatory and red-noise—suggests that the North Atlantic buoyancy-forced AMOC variability is present in both regimes but is weaker in the latter, and moreover there is pronounced multidecadal/centennial AMOC behavior in the latter regime that is unrelated to North Atlantic buoyancy forcing. Article in Journal/Newspaper North Atlantic University of California: eScholarship Geophysical Research Letters 48 14 |
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Open Polar |
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University of California: eScholarship |
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language |
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topic |
Climate Action Life Below Water Meteorology & Atmospheric Sciences |
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Climate Action Life Below Water Meteorology & Atmospheric Sciences Chiang, JCH Cheng, W Kim, WM Kim, S Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity |
topic_facet |
Climate Action Life Below Water Meteorology & Atmospheric Sciences |
description |
The relationship between Atlantic meridional overturning circulation (AMOC) variability and high-latitude North Atlantic buoyancy changes is complicated by the latter both driving, and responding to, AMOC changes. A maximum covariance analysis applied to a 1,201-year preindustrial control simulation reveals two leading modes that separate these two distinct roles of North Atlantic temperature and salinity as related to AMOC variability. A linear combination of the two modes accounts for most of the variation of a widely used AMOC index. The same analysis applied to another control simulation known to possess two distinct regimes of AMOC variability—oscillatory and red-noise—suggests that the North Atlantic buoyancy-forced AMOC variability is present in both regimes but is weaker in the latter, and moreover there is pronounced multidecadal/centennial AMOC behavior in the latter regime that is unrelated to North Atlantic buoyancy forcing. |
format |
Article in Journal/Newspaper |
author |
Chiang, JCH Cheng, W Kim, WM Kim, S |
author_facet |
Chiang, JCH Cheng, W Kim, WM Kim, S |
author_sort |
Chiang, JCH |
title |
Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity |
title_short |
Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity |
title_full |
Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity |
title_fullStr |
Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity |
title_full_unstemmed |
Untangling the Relationship Between AMOC Variability and North Atlantic Upper‐Ocean Temperature and Salinity |
title_sort |
untangling the relationship between amoc variability and north atlantic upper‐ocean temperature and salinity |
publisher |
eScholarship, University of California |
publishDate |
2021 |
url |
https://escholarship.org/uc/item/9bk973wd https://escholarship.org/content/qt9bk973wd/qt9bk973wd.pdf https://doi.org/10.1029/2021gl093496 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geophysical Research Letters, vol 48, iss 14 |
op_relation |
qt9bk973wd https://escholarship.org/uc/item/9bk973wd https://escholarship.org/content/qt9bk973wd/qt9bk973wd.pdf doi:10.1029/2021gl093496 |
op_rights |
public |
op_doi |
https://doi.org/10.1029/2021gl093496 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
14 |
_version_ |
1810459161723404288 |