Mountain torques and atmospheric oscillations
Theoretical work and general circulation model (GCM) experiments suggest that the midlatitude jet stream's interaction with large‐scale topography can drive intraseasonal oscillations in large‐scale atmospheric circulation patterns. In support of this theory, we present new observational eviden...
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2001
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ftdatacite:10.7916/d86q26zx 2023-05-15T14:59:37+02:00 Mountain torques and atmospheric oscillations Lott, François Robertson, Andrew W. Ghil, Michael 2001 https://dx.doi.org/10.7916/d86q26zx https://academiccommons.columbia.edu/doi/10.7916/D86Q26ZX unknown Columbia University https://dx.doi.org/10.1029/2000gl011829 Mountains Atmospheric tides Atmosphere Text Articles article-journal ScholarlyArticle 2001 ftdatacite https://doi.org/10.7916/d86q26zx https://doi.org/10.1029/2000gl011829 2021-11-05T12:55:41Z Theoretical work and general circulation model (GCM) experiments suggest that the midlatitude jet stream's interaction with large‐scale topography can drive intraseasonal oscillations in large‐scale atmospheric circulation patterns. In support of this theory, we present new observational evidence that mountain‐induced torques play a key role in 15–30‐day oscillations of the Northern Hemisphere circulation's dominant patterns. The affected patterns include the Arctic Oscillation (AO) and the Pacific‐North‐American (PNA) pattern. Positive torques both accelerate and anticipate the midlatitude westerly winds at these periodicities. Moreover, torque anomalies anticipate the onsets of weather regimes over the Pacific, as well as the break‐ups of hemispheric‐scale regimes. Text Arctic DataCite Metadata Store (German National Library of Science and Technology) Arctic Pacific |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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unknown |
topic |
Mountains Atmospheric tides Atmosphere |
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Mountains Atmospheric tides Atmosphere Lott, François Robertson, Andrew W. Ghil, Michael Mountain torques and atmospheric oscillations |
topic_facet |
Mountains Atmospheric tides Atmosphere |
description |
Theoretical work and general circulation model (GCM) experiments suggest that the midlatitude jet stream's interaction with large‐scale topography can drive intraseasonal oscillations in large‐scale atmospheric circulation patterns. In support of this theory, we present new observational evidence that mountain‐induced torques play a key role in 15–30‐day oscillations of the Northern Hemisphere circulation's dominant patterns. The affected patterns include the Arctic Oscillation (AO) and the Pacific‐North‐American (PNA) pattern. Positive torques both accelerate and anticipate the midlatitude westerly winds at these periodicities. Moreover, torque anomalies anticipate the onsets of weather regimes over the Pacific, as well as the break‐ups of hemispheric‐scale regimes. |
format |
Text |
author |
Lott, François Robertson, Andrew W. Ghil, Michael |
author_facet |
Lott, François Robertson, Andrew W. Ghil, Michael |
author_sort |
Lott, François |
title |
Mountain torques and atmospheric oscillations |
title_short |
Mountain torques and atmospheric oscillations |
title_full |
Mountain torques and atmospheric oscillations |
title_fullStr |
Mountain torques and atmospheric oscillations |
title_full_unstemmed |
Mountain torques and atmospheric oscillations |
title_sort |
mountain torques and atmospheric oscillations |
publisher |
Columbia University |
publishDate |
2001 |
url |
https://dx.doi.org/10.7916/d86q26zx https://academiccommons.columbia.edu/doi/10.7916/D86Q26ZX |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://dx.doi.org/10.1029/2000gl011829 |
op_doi |
https://doi.org/10.7916/d86q26zx https://doi.org/10.1029/2000gl011829 |
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1766331716436230144 |