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S.I.M.P.L.E. No.: 48   [Series Title]

Trailing Waves along a Large Front - North Atlantic: January 20 - 25, 1983, IR and VIS   [Other Title]
Année de production: 1990
Genre: Documentary Film
Lieu de tournage: n/a

Générique:
Production company: Freie Universität Berlin, Zentraleinrichtung für AV-Medien
First released by: Freie Universität Berlin, Zentraleinrichtung für AV-Medien
Photography: Oliver Rothe
Distributor: IWF (Göttingen)
Author: Günter Warnecke
  Christian Zick


Mot-clés: METEOSAT, Satellitenbildsequenzen

    Résumé:
  • eng
A large-scale polar air mass front extends from the subtropical West Atlantic across the area of the Azores, up to western Europe. Several waves trailing along that front can be observed during the first four days of the period. On 24/25 of January a small rotating cloud configuration develops south of the Azores, indicating a deepening of a wave. It disintegrates, however, probably due to negative vorticity advection ahead of the rapidly following next large scale cold front. The large-scale cold air and warm air cloud patterns each are of typical characters. Ahead of a strong wave, on 20/21 of January, large gravity waves at 40-50°N/20-30°W travel rapidly eastward, as regular parallel patterns of intensification and dissolution, across the almost stationary low level warm air stratiform clouds. A comparison of the VIS and IR sequences of 25 of January enhances the different character of high level and low level cloud motions. The VIS sequence of 25 of January reveals low level Saharan dust being transported across the NW coast of Africa, towards the Canary Islands.

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