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Nonlinear Northern Hemisphere winter atmospheric response to ENSO Wu, Aiming; Hsieh, William W.
Abstract
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.
Item Metadata
Title |
Nonlinear Northern Hemisphere winter atmospheric response to ENSO
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Creator | |
Publisher |
American Geophysical Union
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Date Issued |
2004-01-16
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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.
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Genre | |
Type | |
Language |
eng
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Date Available |
2016-11-10
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0041800
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URI | |
Affiliation | |
Citation |
Wu, Aiming, Hsieh, William W. 2004. Nonlinear Northern Hemisphere winter atmospheric response to ENSO. Geophysical Research Letters, 31 L02203
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Publisher DOI |
10.1029/2003GL018885
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Peer Review Status |
Reviewed
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Scholarly Level |
Faculty
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Copyright Holder |
Hsieh, William W.
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International