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| Titel |
What is the origin and impact of vortices initiated downwind of Hoggar Mountains ? |
| VerfasserIn |
Jean Philippe Duvel |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250149746
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| Publikation (Nr.) |
 EGU/EGU2017-14127.pdf |
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| Zusammenfassung |
| Using an original approach to detect tropical depression vortices (TDVs) in the interim ECMWF Re-Analyses (ERA-Interim) reveals that TDVs are regularly initiated south of the Hoggar Mountains . The initiation of these TDVs is associated with a deepening of a depression downwind of the orography due to a reinforcement of the north-easterly low-level (Harmattan) wind. Some of these TDVs move south-westward to the Atlantic Ocean where they can intensify and reach tropical cyclone strength. The origin of these TDVs — in particular their relation with the extratropics and with African easterly waves — and their impact on the East Atlantic cyclogenesis will be discussed. |
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