Mountain torques and synoptic systems in the Mediterranean
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...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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ftdlr:oai:elib.dlr.de:56477 2023-05-15T17:34:25+02:00 Mountain torques and synoptic systems in the Mediterranean Egger, Joseph Hoinka, Klaus-Peter 2008 application/pdf https://elib.dlr.de/56477/ https://elib.dlr.de/56477/1/08-fulltext.pdf http://www3.interscience.wiley.com/journal/113388514/home en eng Wiley https://elib.dlr.de/56477/1/08-fulltext.pdf Egger, Joseph und Hoinka, Klaus-Peter (2008) Mountain torques and synoptic systems in the Mediterranean. Quarterly Journal of the Royal Meteorological Society, 134, Seiten 1067-1081. Wiley. DOI:10.1002/qj.248 <https://doi.org/10.1002/qj.248> Wolkenphysik und Verkehrsmeteorologie Zeitschriftenbeitrag PeerReviewed 2008 ftdlr https://doi.org/10.1002/qj.248 2019-08-04T22:54:37Z 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 (Tλ and Tϕ) 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 Tλ (Tϕ) 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 Tλ is evaluated. The impact of the Atlas mountains is seen only at τ = 0. Other Non-Article Part of Journal/Newspaper North Atlantic German Aerospace Center: elib - DLR electronic library Quarterly Journal of the Royal Meteorological Society 134 634 1067 1081 |
institution |
Open Polar |
collection |
German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
English |
topic |
Wolkenphysik und Verkehrsmeteorologie |
spellingShingle |
Wolkenphysik und Verkehrsmeteorologie Egger, Joseph Hoinka, Klaus-Peter Mountain torques and synoptic systems in the Mediterranean |
topic_facet |
Wolkenphysik und Verkehrsmeteorologie |
description |
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 (Tλ and Tϕ) 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 Tλ (Tϕ) 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 Tλ is evaluated. The impact of the Atlas mountains is seen only at τ = 0. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Egger, Joseph Hoinka, Klaus-Peter |
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 |
https://elib.dlr.de/56477/ https://elib.dlr.de/56477/1/08-fulltext.pdf http://www3.interscience.wiley.com/journal/113388514/home |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://elib.dlr.de/56477/1/08-fulltext.pdf Egger, Joseph und Hoinka, Klaus-Peter (2008) Mountain torques and synoptic systems in the Mediterranean. Quarterly Journal of the Royal Meteorological Society, 134, Seiten 1067-1081. Wiley. DOI:10.1002/qj.248 <https://doi.org/10.1002/qj.248> |
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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1766133244966731776 |