Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic
The Atlantic Multidedal Oscillation (AMO) is a prominent mode of sea surface temperature variability in the Atlantic and incurs significant global influence. Most coupled models failed to reproduce the observed 50-80-year AMO, but were overwhelmed by a 10-30-year AMO. Here we show that the 50-80-yea...
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ftncar:oai:drupal-site.org:articles_22378 2023-09-05T13:19:54+02:00 Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic Lin, Pengfei (author) Yu, Zipeng (author) Lü, Jianhua (author) Ding, Mengrong (author) Hu, Aixue (author) Liu, Hailong (author) 2019-02-15 https://doi.org/10.1016/j.scib.2018.12.027 en eng Science Bulletin--Science Bulletin--20959273 articles:22378 ark:/85065/d7d50r0p doi:10.1016/j.scib.2018.12.027 Copyright 2019 Science China Press.This work is licensed under a Creative Commons Attribution 4.0 International license. article Text 2019 ftncar https://doi.org/10.1016/j.scib.2018.12.027 2023-08-14T18:48:47Z The Atlantic Multidedal Oscillation (AMO) is a prominent mode of sea surface temperature variability in the Atlantic and incurs significant global influence. Most coupled models failed to reproduce the observed 50-80-year AMO, but were overwhelmed by a 10-30-year AMO. Here we show that the 50-80-year AMO and 10-30-year AMO represent two different AMO regimes. The key differences are: (1) the 50-80-year AMO involves transport of warm and saline Atlantic water into the Greenland-Iceland-Norwegian (GIN) Seas prior to reaching its maximum positive phase, while such a transport is weak for the 10-30-year AMO; (2) the zonality of atmospheric variability associated with the 50-80 year AMO favors the transport of warm and saline water into the GIN Seas; (3) the disappearance of Pacific variability weakens the zonality of atmospheric variability and the transport of warm and saline water into the GIN Seas, leading to the weakening of the 50-80-year AMO. In contrast, the 10-30-year AMO does not show dependence on the variability in Pacific and in the GIN Seas and may be an Atlantic-intrinsic mode. Our results suggest that differentiating these AMO regimes and a better understanding of the cross-basin connections are essential to reconcile the current debate on the nature of AMO and hence to its reliable prediction, which is still lacking in most of coupled models. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. Article in Journal/Newspaper Greenland Iceland OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Greenland Pacific Science Bulletin 64 3 198 204 |
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Open Polar |
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OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The Atlantic Multidedal Oscillation (AMO) is a prominent mode of sea surface temperature variability in the Atlantic and incurs significant global influence. Most coupled models failed to reproduce the observed 50-80-year AMO, but were overwhelmed by a 10-30-year AMO. Here we show that the 50-80-year AMO and 10-30-year AMO represent two different AMO regimes. The key differences are: (1) the 50-80-year AMO involves transport of warm and saline Atlantic water into the Greenland-Iceland-Norwegian (GIN) Seas prior to reaching its maximum positive phase, while such a transport is weak for the 10-30-year AMO; (2) the zonality of atmospheric variability associated with the 50-80 year AMO favors the transport of warm and saline water into the GIN Seas; (3) the disappearance of Pacific variability weakens the zonality of atmospheric variability and the transport of warm and saline water into the GIN Seas, leading to the weakening of the 50-80-year AMO. In contrast, the 10-30-year AMO does not show dependence on the variability in Pacific and in the GIN Seas and may be an Atlantic-intrinsic mode. Our results suggest that differentiating these AMO regimes and a better understanding of the cross-basin connections are essential to reconcile the current debate on the nature of AMO and hence to its reliable prediction, which is still lacking in most of coupled models. (C) 2019 Science China Press. Published by Elsevier B.V. and Science China Press. |
author2 |
Lin, Pengfei (author) Yu, Zipeng (author) Lü, Jianhua (author) Ding, Mengrong (author) Hu, Aixue (author) Liu, Hailong (author) |
format |
Article in Journal/Newspaper |
title |
Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic |
spellingShingle |
Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic |
title_short |
Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic |
title_full |
Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic |
title_fullStr |
Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic |
title_full_unstemmed |
Two regimes of Atlantic multidecadal oscillation: Cross-basin dependent or Atlantic-intrinsic |
title_sort |
two regimes of atlantic multidecadal oscillation: cross-basin dependent or atlantic-intrinsic |
publishDate |
2019 |
url |
https://doi.org/10.1016/j.scib.2018.12.027 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Greenland Iceland |
genre_facet |
Greenland Iceland |
op_relation |
Science Bulletin--Science Bulletin--20959273 articles:22378 ark:/85065/d7d50r0p doi:10.1016/j.scib.2018.12.027 |
op_rights |
Copyright 2019 Science China Press.This work is licensed under a Creative Commons Attribution 4.0 International license. |
op_doi |
https://doi.org/10.1016/j.scib.2018.12.027 |
container_title |
Science Bulletin |
container_volume |
64 |
container_issue |
3 |
container_start_page |
198 |
op_container_end_page |
204 |
_version_ |
1776200691225722880 |