Mountain Torques and Intraseasonal Atmospheric Oscillations
Broad-peak intraseasonal oscillations in large-scale Northern Hemisphere atmospheric circulation patterns provide a basis for extended-range weather prediction, given an understanding of the underlying mechanisms. Theoretical work and general circulation model (GCM) experiments suggest that the midl...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.31.7763 2023-05-15T15:01:26+02:00 Mountain Torques and Intraseasonal Atmospheric Oscillations Francois Lott Andrew W. Robertson Michael Ghil The Pennsylvania State University CiteSeerX Archives application/postscript http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.31.7763 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.31.7763 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://tule.atmos.ucla.edu/pub/tcdatmos/papers/LOTTREV3.ps.gz text ftciteseerx 2016-01-07T22:28:56Z Broad-peak intraseasonal oscillations in large-scale Northern Hemisphere atmospheric circulation patterns provide a basis for extended-range weather prediction, given an understanding of the underlying mechanisms. Theoretical work and general circulation model (GCM) experiments suggest that the midlatitude jet stream's interaction with large-scale topography can drive such oscillations through a topographic instability. 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 circulation's Northern Hemisphere 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 Unknown Arctic Broad Peak ENVELOPE(-71.231,-71.231,70.495,70.495) Pacific |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Broad-peak intraseasonal oscillations in large-scale Northern Hemisphere atmospheric circulation patterns provide a basis for extended-range weather prediction, given an understanding of the underlying mechanisms. Theoretical work and general circulation model (GCM) experiments suggest that the midlatitude jet stream's interaction with large-scale topography can drive such oscillations through a topographic instability. 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 circulation's Northern Hemisphere 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. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Francois Lott Andrew W. Robertson Michael Ghil |
spellingShingle |
Francois Lott Andrew W. Robertson Michael Ghil Mountain Torques and Intraseasonal Atmospheric Oscillations |
author_facet |
Francois Lott Andrew W. Robertson Michael Ghil |
author_sort |
Francois Lott |
title |
Mountain Torques and Intraseasonal Atmospheric Oscillations |
title_short |
Mountain Torques and Intraseasonal Atmospheric Oscillations |
title_full |
Mountain Torques and Intraseasonal Atmospheric Oscillations |
title_fullStr |
Mountain Torques and Intraseasonal Atmospheric Oscillations |
title_full_unstemmed |
Mountain Torques and Intraseasonal Atmospheric Oscillations |
title_sort |
mountain torques and intraseasonal atmospheric oscillations |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.31.7763 |
long_lat |
ENVELOPE(-71.231,-71.231,70.495,70.495) |
geographic |
Arctic Broad Peak Pacific |
geographic_facet |
Arctic Broad Peak Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ftp://tule.atmos.ucla.edu/pub/tcdatmos/papers/LOTTREV3.ps.gz |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.31.7763 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766333459291176960 |