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| Titel |
Cyclogenesis in the lee of the Atlas Mountains: a factor separation numerical study |
| VerfasserIn |
K. Horvath, L. Fita, R. Romero, B. Ivancan-Picek, I. Stiperski |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 7th Plinius Conference on Mediterranean Storms (2005) ; Nr. 7 (2006-05-09), S.327-331 |
| Datensatznummer |
250004312
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| Publikation (Nr.) |
 copernicus.org/adgeo-7-327-2006.pdf |
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| Zusammenfassung |
| The initiation of a deep and severe impact Mediterranean cyclone in the lee
of Atlas Mountains is investigated by a series of numerical experiments using
the MM5 forecast model. Roles of orography, surface sensible heat flux and an
upper-level potential vorticity anomaly are identified using factor
separation method. Results of model simulations show that orography blocking
is responsible for generation of the low-level shallow vortex in the first
phase of lee development. Upper-level potential vorticity is a principal
ingredient of this event, responsible for a dominant deepening effect in the
later stage of lee formation. Analysis of cyclone paths shows that orography
tends to keep the cyclone stationary, while upper-level dynamical factors are
crucial for advection of the system to the Mediterranean Sea. The most
noteworthy influence of surface sensible heat flux is identified as an
afternoon destruction of a surface baroclinic zone and associated weaker
cyclogenesis. |
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