Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM
The influence of zonally asymmetric boundary conditions on the leading modes of variability in a suite of atmospheric general circulation models is investigated. The set of experiments consists of nine model configurations, with varying degrees and types of zonal asymmetry in their boundary conditio...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.143.4932 2023-05-15T17:33:48+02:00 Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM Benjamin A. Cash Paul J. Kushner Geoffrey K. Vallis The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.4932 http://www.gfdl.noaa.gov/reference/bibliography/2005/bac0501.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.4932 http://www.gfdl.noaa.gov/reference/bibliography/2005/bac0501.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfdl.noaa.gov/reference/bibliography/2005/bac0501.pdf text 2003 ftciteseerx 2016-01-07T15:02:33Z The influence of zonally asymmetric boundary conditions on the leading modes of variability in a suite of atmospheric general circulation models is investigated. The set of experiments consists of nine model configurations, with varying degrees and types of zonal asymmetry in their boundary conditions. The structure of the leading EOF varies with the zonal asymmetry of the base state for each model configuration. In particular, a close relationship is found between the structure of the EOF and the model storm tracks. An approximately linear relationship is found to hold between the magnitude of the zonal asymmetry of the leading EOF and of the storm tracks in the models. It is shown that this linear relationship extends to the observations. One-point correlation maps centered on the regions where the EOFs reach their maximum amplitude show similar structures for all configurations. These structures consist of a north–south dipole, resembling the observed structure of the North Atlantic Oscillation (NAO). They are significantly more zonally localized than the leading EOF, but do resemble one-point correlation maps and sector EOFs calculated for a simulation with zonally symmetric boundary conditions. Thus, the leading EOF for each simulation appears to represent the longitudinal distribution of zonally localized NAO-like patterns. This longitudinal Text North Atlantic North Atlantic oscillation Unknown |
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English |
description |
The influence of zonally asymmetric boundary conditions on the leading modes of variability in a suite of atmospheric general circulation models is investigated. The set of experiments consists of nine model configurations, with varying degrees and types of zonal asymmetry in their boundary conditions. The structure of the leading EOF varies with the zonal asymmetry of the base state for each model configuration. In particular, a close relationship is found between the structure of the EOF and the model storm tracks. An approximately linear relationship is found to hold between the magnitude of the zonal asymmetry of the leading EOF and of the storm tracks in the models. It is shown that this linear relationship extends to the observations. One-point correlation maps centered on the regions where the EOFs reach their maximum amplitude show similar structures for all configurations. These structures consist of a north–south dipole, resembling the observed structure of the North Atlantic Oscillation (NAO). They are significantly more zonally localized than the leading EOF, but do resemble one-point correlation maps and sector EOFs calculated for a simulation with zonally symmetric boundary conditions. Thus, the leading EOF for each simulation appears to represent the longitudinal distribution of zonally localized NAO-like patterns. This longitudinal |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Benjamin A. Cash Paul J. Kushner Geoffrey K. Vallis |
spellingShingle |
Benjamin A. Cash Paul J. Kushner Geoffrey K. Vallis Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM |
author_facet |
Benjamin A. Cash Paul J. Kushner Geoffrey K. Vallis |
author_sort |
Benjamin A. Cash |
title |
Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM |
title_short |
Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM |
title_full |
Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM |
title_fullStr |
Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM |
title_full_unstemmed |
Zonal Asymmetries, Teleconnections, and Annular Patterns in a GCM |
title_sort |
zonal asymmetries, teleconnections, and annular patterns in a gcm |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.4932 http://www.gfdl.noaa.gov/reference/bibliography/2005/bac0501.pdf |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
http://www.gfdl.noaa.gov/reference/bibliography/2005/bac0501.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.143.4932 http://www.gfdl.noaa.gov/reference/bibliography/2005/bac0501.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766132426586718208 |