Mountain torques and synoptic systems in the Mediterranean
Abstract The mountains surrounding the Mediterranean exert torques T during the passage of North Atlantic systems which affect the angular momentum of the airflow passing over and around the massifs. The Alps, the Atlas range and the orographic block of Asia Minor are selected to investigate the typ...
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crwiley:10.1002/qj.248 2024-06-02T08:11:35+00:00 Mountain torques and synoptic systems in the Mediterranean Egger, Joseph Hoinka, Klaus‐Peter 2008 http://dx.doi.org/10.1002/qj.248 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.248 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.248 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 134, issue 634, page 1067-1081 ISSN 0035-9009 1477-870X journal-article 2008 crwiley https://doi.org/10.1002/qj.248 2024-05-03T10:41:50Z Abstract The mountains surrounding the Mediterranean exert torques T during the passage of North Atlantic systems which affect the angular momentum of the airflow passing over and around the massifs. The Alps, the Atlas range and the orographic block of Asia Minor are selected to investigate the typical flow conditions during torque events. These mountain ranges are small enough to justify a local angular momentum analysis. Both the zonal and the meridional components of a mountain's torque ( T λ and T φ ) are used as stratification parameters in a statistical investigation of the interaction of large‐scale perturbations with this mountain. How are these flows affected by the obstacle? A simple scheme is tested which attempts to interpret results. The torque analysis singles out eastward‐moving large‐scale systems. Their isobars are oriented from southwest (northwest) to northeast (southeast) near the mountain in zonal torque T λ ( T φ ) cases. The massifs tend to generate a low‐level distortion of the pressure field such that the angular momentum of the flow over the mountain is reduced. These results can be explained within the framework of the scheme. The influence of the mountains on the pressure field is seen only at heights ≤4000 m. The low‐level distortions of the pressure field contribute positively to the total torque for lags τ≤0 in the Alps and for all lags − 2≤τ≤2 days in Asia Minor, where only T λ is evaluated. The impact of the Atlas mountains is seen only at τ = 0. Copyright © 2008 Royal Meteorological Society Article in Journal/Newspaper North Atlantic Wiley Online Library Quarterly Journal of the Royal Meteorological Society 134 634 1067 1081 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The mountains surrounding the Mediterranean exert torques T during the passage of North Atlantic systems which affect the angular momentum of the airflow passing over and around the massifs. The Alps, the Atlas range and the orographic block of Asia Minor are selected to investigate the typical flow conditions during torque events. These mountain ranges are small enough to justify a local angular momentum analysis. Both the zonal and the meridional components of a mountain's torque ( T λ and T φ ) are used as stratification parameters in a statistical investigation of the interaction of large‐scale perturbations with this mountain. How are these flows affected by the obstacle? A simple scheme is tested which attempts to interpret results. The torque analysis singles out eastward‐moving large‐scale systems. Their isobars are oriented from southwest (northwest) to northeast (southeast) near the mountain in zonal torque T λ ( T φ ) cases. The massifs tend to generate a low‐level distortion of the pressure field such that the angular momentum of the flow over the mountain is reduced. These results can be explained within the framework of the scheme. The influence of the mountains on the pressure field is seen only at heights ≤4000 m. The low‐level distortions of the pressure field contribute positively to the total torque for lags τ≤0 in the Alps and for all lags − 2≤τ≤2 days in Asia Minor, where only T λ is evaluated. The impact of the Atlas mountains is seen only at τ = 0. Copyright © 2008 Royal Meteorological Society |
format |
Article in Journal/Newspaper |
author |
Egger, Joseph Hoinka, Klaus‐Peter |
spellingShingle |
Egger, Joseph Hoinka, Klaus‐Peter Mountain torques and synoptic systems in the Mediterranean |
author_facet |
Egger, Joseph Hoinka, Klaus‐Peter |
author_sort |
Egger, Joseph |
title |
Mountain torques and synoptic systems in the Mediterranean |
title_short |
Mountain torques and synoptic systems in the Mediterranean |
title_full |
Mountain torques and synoptic systems in the Mediterranean |
title_fullStr |
Mountain torques and synoptic systems in the Mediterranean |
title_full_unstemmed |
Mountain torques and synoptic systems in the Mediterranean |
title_sort |
mountain torques and synoptic systems in the mediterranean |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1002/qj.248 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.248 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.248 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 134, issue 634, page 1067-1081 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.248 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
134 |
container_issue |
634 |
container_start_page |
1067 |
op_container_end_page |
1081 |
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1800757780365180928 |