q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models
A set of simple analytical models is presented and evaluated for interannual to decadal coupled ocean– atmosphere modes at midlatitudes. The atmosphere and ocean are each in Sverdrup balance at these long timescales. The atmosphere’s temperature response to heating determines the spatial phase relat...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.542.8458 2023-05-15T14:02:32+02:00 q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models Lynne D. Talley The Pennsylvania State University CiteSeerX Archives 1997 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.8458 http://www-pord.ucsd.edu/~ltalley/papers/1990s/jpo1999_talley.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.8458 http://www-pord.ucsd.edu/~ltalley/papers/1990s/jpo1999_talley.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www-pord.ucsd.edu/~ltalley/papers/1990s/jpo1999_talley.pdf text 1997 ftciteseerx 2016-01-08T11:09:01Z A set of simple analytical models is presented and evaluated for interannual to decadal coupled ocean– atmosphere modes at midlatitudes. The atmosphere and ocean are each in Sverdrup balance at these long timescales. The atmosphere’s temperature response to heating determines the spatial phase relation between SST and sea level pressure (SLP) anomalies. Vertical advection balancing heating produces high (low) SLP lying east of warm (cold) SST anomalies, as observed in the Antarctic circumpolar wave (ACW), the decadal North Pacific mode, and the interannual North Atlantic mode. Zonal advection in an atmosphere with a rigid lid produces low SLP east of warm SST. However, if an ad hoc equivalent barotropic atmospheric response is assumed, high SLP lies east of warm SST. Relaxation to heating produces behavior like the observed North Atlantic decadal pattern, with low SLP over warm SST. Meridional advection in the atmosphere cannot produce the observed SST/SLP patterns. The dominant balance in the ocean’s temperature equation determines the phase speed of the modes. The coupled mode is nondispersive in all models examined here, indicating the need for additional processes. For modes with an SST–SLP offset as observed in the ACW and North Pacific, Ekman convergence acting as a heat source causes eastward propagation relative to the mean ocean flow. Sverdrup response to Ekman con- Text Antarc* Antarctic North Atlantic Unknown Antarctic The Antarctic Pacific |
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language |
English |
description |
A set of simple analytical models is presented and evaluated for interannual to decadal coupled ocean– atmosphere modes at midlatitudes. The atmosphere and ocean are each in Sverdrup balance at these long timescales. The atmosphere’s temperature response to heating determines the spatial phase relation between SST and sea level pressure (SLP) anomalies. Vertical advection balancing heating produces high (low) SLP lying east of warm (cold) SST anomalies, as observed in the Antarctic circumpolar wave (ACW), the decadal North Pacific mode, and the interannual North Atlantic mode. Zonal advection in an atmosphere with a rigid lid produces low SLP east of warm SST. However, if an ad hoc equivalent barotropic atmospheric response is assumed, high SLP lies east of warm SST. Relaxation to heating produces behavior like the observed North Atlantic decadal pattern, with low SLP over warm SST. Meridional advection in the atmosphere cannot produce the observed SST/SLP patterns. The dominant balance in the ocean’s temperature equation determines the phase speed of the modes. The coupled mode is nondispersive in all models examined here, indicating the need for additional processes. For modes with an SST–SLP offset as observed in the ACW and North Pacific, Ekman convergence acting as a heat source causes eastward propagation relative to the mean ocean flow. Sverdrup response to Ekman con- |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Lynne D. Talley |
spellingShingle |
Lynne D. Talley q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models |
author_facet |
Lynne D. Talley |
author_sort |
Lynne D. Talley |
title |
q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models |
title_short |
q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models |
title_full |
q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models |
title_fullStr |
q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models |
title_full_unstemmed |
q 1999 American Meteorological Society Simple Coupled Midlatitude Climate Models |
title_sort |
q 1999 american meteorological society simple coupled midlatitude climate models |
publishDate |
1997 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.8458 http://www-pord.ucsd.edu/~ltalley/papers/1990s/jpo1999_talley.pdf |
geographic |
Antarctic The Antarctic Pacific |
geographic_facet |
Antarctic The Antarctic Pacific |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_source |
http://www-pord.ucsd.edu/~ltalley/papers/1990s/jpo1999_talley.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.542.8458 http://www-pord.ucsd.edu/~ltalley/papers/1990s/jpo1999_talley.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766272853078966272 |