The North Atlantic jet stream: a look at preferred positions, paths and transitions
Abstract Preferred jet stream positions and their link to regional circulation patterns over the winter North Atlantic/European sector are investigated to corroborate findings of multimodal behaviour of the jet positions and to analyse patterns of preferred paths and transition probabilities between...
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crwiley:10.1002/qj.959 2024-06-02T08:07:26+00:00 The North Atlantic jet stream: a look at preferred positions, paths and transitions Hannachi, A. Woollings, T. Fraedrich, K. National Environmental Research Council 2011 http://dx.doi.org/10.1002/qj.959 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.959 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.959 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 138, issue 665, page 862-877 ISSN 0035-9009 1477-870X journal-article 2011 crwiley https://doi.org/10.1002/qj.959 2024-05-03T11:44:51Z Abstract Preferred jet stream positions and their link to regional circulation patterns over the winter North Atlantic/European sector are investigated to corroborate findings of multimodal behaviour of the jet positions and to analyse patterns of preferred paths and transition probabilities between jet regimes using ERA‐40 data. Besides the multivariate Gaussian mixture model, hierarchical clustering and data image techniques are used for this purpose. The different approaches all yield circulation patterns that correspond to the preferred jet regimes, namely the southern, central and the northern positions associated respectively with the Greenland anticyclone or blocking, and two opposite phases of an East Atlantic‐like flow pattern. Growth and decay patterns as well as preferred paths of the system trajectory are studied using the mixture model within the delay space. The analysis shows that the most preferred paths are associated with central to north and north to south jet stream transitions with a typical time‐scale of about 5 days, and with life cycles of 1–2 weeks. The transition paths are found to be consistent with transition probabilities. The analysis also shows that wave breaking seems to be the dominant mechanism behind Greenland blocking. Copyright © 2011 Royal Meteorological Society Article in Journal/Newspaper Greenland North Atlantic Wiley Online Library Greenland Quarterly Journal of the Royal Meteorological Society 138 665 862 877 |
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Wiley Online Library |
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English |
description |
Abstract Preferred jet stream positions and their link to regional circulation patterns over the winter North Atlantic/European sector are investigated to corroborate findings of multimodal behaviour of the jet positions and to analyse patterns of preferred paths and transition probabilities between jet regimes using ERA‐40 data. Besides the multivariate Gaussian mixture model, hierarchical clustering and data image techniques are used for this purpose. The different approaches all yield circulation patterns that correspond to the preferred jet regimes, namely the southern, central and the northern positions associated respectively with the Greenland anticyclone or blocking, and two opposite phases of an East Atlantic‐like flow pattern. Growth and decay patterns as well as preferred paths of the system trajectory are studied using the mixture model within the delay space. The analysis shows that the most preferred paths are associated with central to north and north to south jet stream transitions with a typical time‐scale of about 5 days, and with life cycles of 1–2 weeks. The transition paths are found to be consistent with transition probabilities. The analysis also shows that wave breaking seems to be the dominant mechanism behind Greenland blocking. Copyright © 2011 Royal Meteorological Society |
author2 |
National Environmental Research Council |
format |
Article in Journal/Newspaper |
author |
Hannachi, A. Woollings, T. Fraedrich, K. |
spellingShingle |
Hannachi, A. Woollings, T. Fraedrich, K. The North Atlantic jet stream: a look at preferred positions, paths and transitions |
author_facet |
Hannachi, A. Woollings, T. Fraedrich, K. |
author_sort |
Hannachi, A. |
title |
The North Atlantic jet stream: a look at preferred positions, paths and transitions |
title_short |
The North Atlantic jet stream: a look at preferred positions, paths and transitions |
title_full |
The North Atlantic jet stream: a look at preferred positions, paths and transitions |
title_fullStr |
The North Atlantic jet stream: a look at preferred positions, paths and transitions |
title_full_unstemmed |
The North Atlantic jet stream: a look at preferred positions, paths and transitions |
title_sort |
north atlantic jet stream: a look at preferred positions, paths and transitions |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/qj.959 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.959 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.959 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 138, issue 665, page 862-877 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.959 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
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138 |
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665 |
container_start_page |
862 |
op_container_end_page |
877 |
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1800752512951648256 |