The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation
Abstract. A nonlinear generalisation of Principal Component Analysis (PCA) is applied to the 500mb geopotential height field of the Northern Hemisphere extratropical atmosphere. It is found that the low-frequency variability of the mid-troposphere is characterised by three distinct quasistationary s...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.331.4538 2023-05-15T14:59:33+02:00 The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation A. H. Monahan J. C. Fyfe The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.331.4538 http://www.cccma.ec.gc.ca/papers/jfyfe/PDF/MonahanPandolfoFyfe2001a.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.331.4538 http://www.cccma.ec.gc.ca/papers/jfyfe/PDF/MonahanPandolfoFyfe2001a.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cccma.ec.gc.ca/papers/jfyfe/PDF/MonahanPandolfoFyfe2001a.pdf text ftciteseerx 2016-09-11T00:02:11Z Abstract. A nonlinear generalisation of Principal Component Analysis (PCA) is applied to the 500mb geopotential height field of the Northern Hemisphere extratropical atmosphere. It is found that the low-frequency variability of the mid-troposphere is characterised by three distinct quasistationary states. The states are described and compared to those obtained from applications of cluster analyses and linear PCA to the height field. Evidence is provided that modes obtained through PCA (notably the Arctic Oscillation (AO)) are not independent dynamical modes of variability of the Northern Hemisphere extratropics. Rather they arise as the optimal linear compromise between the preferred quasi-stationary states of the circulation. 1. Text Arctic Unknown Arctic |
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ftciteseerx |
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English |
description |
Abstract. A nonlinear generalisation of Principal Component Analysis (PCA) is applied to the 500mb geopotential height field of the Northern Hemisphere extratropical atmosphere. It is found that the low-frequency variability of the mid-troposphere is characterised by three distinct quasistationary states. The states are described and compared to those obtained from applications of cluster analyses and linear PCA to the height field. Evidence is provided that modes obtained through PCA (notably the Arctic Oscillation (AO)) are not independent dynamical modes of variability of the Northern Hemisphere extratropics. Rather they arise as the optimal linear compromise between the preferred quasi-stationary states of the circulation. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
A. H. Monahan J. C. Fyfe |
spellingShingle |
A. H. Monahan J. C. Fyfe The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation |
author_facet |
A. H. Monahan J. C. Fyfe |
author_sort |
A. H. Monahan |
title |
The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation |
title_short |
The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation |
title_full |
The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation |
title_fullStr |
The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation |
title_full_unstemmed |
The Preferred Structure of Variability of the Northern Hemisphere Atmospheric Circulation |
title_sort |
preferred structure of variability of the northern hemisphere atmospheric circulation |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.331.4538 http://www.cccma.ec.gc.ca/papers/jfyfe/PDF/MonahanPandolfoFyfe2001a.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
http://www.cccma.ec.gc.ca/papers/jfyfe/PDF/MonahanPandolfoFyfe2001a.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.331.4538 http://www.cccma.ec.gc.ca/papers/jfyfe/PDF/MonahanPandolfoFyfe2001a.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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1766331661738311680 |