Nonlinear Northern Hemisphere winter atmospheric response to ENSO
A nonlinear projection of the tropical Pacific sea surface temperature anomalies (SSTA) onto the Northern Hemisphere winter 500-mbar geopotential height (Z500) by a neural network reveals asymmetric atmospheric patterns associated with El Niño and La Niña. While the linear response of Z500 to tropic...
Published in: | Geophysical Research Letters |
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American Geophysical Union
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Online Access: | http://hdl.handle.net/2429/32865 https://doi.org/10.1029/2003GL018885 |
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ftunivbritcolcir:oai:circle.library.ubc.ca:2429/32865 2023-05-15T17:29:07+02:00 Nonlinear Northern Hemisphere winter atmospheric response to ENSO Wu, Aiming Hsieh, William W. 2004-01-16 http://hdl.handle.net/2429/32865 https://doi.org/10.1029/2003GL018885 eng eng American Geophysical Union Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Hsieh, William W. CC-BY-NC-ND Text Article 2004 ftunivbritcolcir https://doi.org/10.1029/2003GL018885 2019-10-15T18:02:50Z A nonlinear projection of the tropical Pacific sea surface temperature anomalies (SSTA) onto the Northern Hemisphere winter 500-mbar geopotential height (Z500) by a neural network reveals asymmetric atmospheric patterns associated with El Niño and La Niña. While the linear response of Z500 to tropical Pacific SSTA is largely confined over North Pacific and North America, the nonlinear response, mainly a quadratic response to the SSTA, reveals that regardless of the sign of the SSTA, positive Z500 anomalies are found over the central-eastern North America, North Atlantic and western Europe, and negative Z500 anomalies over the west coast of North America, Scandinavia and eastern Europe—consistent with the positive Pacific-North America (PNA) teleconnection pattern and the positive North Atlantic Oscillation (NAO) pattern being excited. An edited version of this paper was published by AGU. Copyright 2004 American Geophysical Union. Science, Faculty of Earth and Ocean Sciences, Department of Reviewed Faculty Article in Journal/Newspaper North Atlantic North Atlantic oscillation University of British Columbia: cIRcle - UBC's Information Repository Pacific Geophysical Research Letters 31 2 |
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Open Polar |
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University of British Columbia: cIRcle - UBC's Information Repository |
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ftunivbritcolcir |
language |
English |
description |
A nonlinear projection of the tropical Pacific sea surface temperature anomalies (SSTA) onto the Northern Hemisphere winter 500-mbar geopotential height (Z500) by a neural network reveals asymmetric atmospheric patterns associated with El Niño and La Niña. While the linear response of Z500 to tropical Pacific SSTA is largely confined over North Pacific and North America, the nonlinear response, mainly a quadratic response to the SSTA, reveals that regardless of the sign of the SSTA, positive Z500 anomalies are found over the central-eastern North America, North Atlantic and western Europe, and negative Z500 anomalies over the west coast of North America, Scandinavia and eastern Europe—consistent with the positive Pacific-North America (PNA) teleconnection pattern and the positive North Atlantic Oscillation (NAO) pattern being excited. An edited version of this paper was published by AGU. Copyright 2004 American Geophysical Union. Science, Faculty of Earth and Ocean Sciences, Department of Reviewed Faculty |
format |
Article in Journal/Newspaper |
author |
Wu, Aiming Hsieh, William W. |
spellingShingle |
Wu, Aiming Hsieh, William W. Nonlinear Northern Hemisphere winter atmospheric response to ENSO |
author_facet |
Wu, Aiming Hsieh, William W. |
author_sort |
Wu, Aiming |
title |
Nonlinear Northern Hemisphere winter atmospheric response to ENSO |
title_short |
Nonlinear Northern Hemisphere winter atmospheric response to ENSO |
title_full |
Nonlinear Northern Hemisphere winter atmospheric response to ENSO |
title_fullStr |
Nonlinear Northern Hemisphere winter atmospheric response to ENSO |
title_full_unstemmed |
Nonlinear Northern Hemisphere winter atmospheric response to ENSO |
title_sort |
nonlinear northern hemisphere winter atmospheric response to enso |
publisher |
American Geophysical Union |
publishDate |
2004 |
url |
http://hdl.handle.net/2429/32865 https://doi.org/10.1029/2003GL018885 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Hsieh, William W. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1029/2003GL018885 |
container_title |
Geophysical Research Letters |
container_volume |
31 |
container_issue |
2 |
_version_ |
1766122707622035456 |