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Synoptic-scale weather patterns during Alpine heavy rain

Hoinka, K.P. und Schwierz, C. und Martius, O. (2006) Synoptic-scale weather patterns during Alpine heavy rain. Quarterly Journal of the Royal Meteorological Society, 132, Seiten 2853-2860. DOI: 10.1256/qj.05.239.

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Offizielle URL: http://www3.interscience.wiley.com/cgi-bin/jtoc/113388514/

Kurzfassung

Autumnal streamer-type elongated troughs are related to heavy precipitation observed at the southside of the European Alps. In order to study the development of this configuration, the typical structural evolution of the ambient flow in the event of heavy rain is investigated by lagged analyses. The precipitation amounts, both observations at the Alpine southside and from ERA40 forecasts by the ECMWF, are chosen as parameters to be correlated with atmospheric fields provided by the ERA40 data. Indeed, the resulting statistics indicate that the preferable position of elongated streamers is quasi-north–south aligned and extending southward over the Mediterranean Sea with its southern end located between the Pyrenees and northern Africa. A significant orographic impact on the streamer is revealed in the regression fields of the upper-level potential vorticity showing an indentation above the western Alps. The lower-tropospheric regression fields show a zonally elongated pressure signal due to the orographic influence. Up to two days in advance of heavy rain events a regressed meridional humidity flux occurs towards the south-western Alps, which at the event’s peak time is found impinging upon the entire Alpine ridge. The regressed vertical velocity fields exhibit two maxima south of the Alps, a strong one at the western and a weaker one over the eastern Alps.

Dokumentart:Zeitschriftenbeitrag
Titel:Synoptic-scale weather patterns during Alpine heavy rain
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Hoinka, K.P.NICHT SPEZIFIZIERT
Schwierz, C.ETH, Zürich, CH
Martius, O.ETH, Zürich, CH
Datum:2006
Erschienen in:Quarterly Journal of the Royal Meteorological Society
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:132
DOI :10.1256/qj.05.239
Seitenbereich:Seiten 2853-2860
Status:veröffentlicht
Stichwörter:PV-Streamer, Alpen, MAP, Alps flooding, ERA40
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Atmosphären- und Klimaforschung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie
Hinterlegt von: Jana Freund
Hinterlegt am:03 Jul 2007
Letzte Änderung:11 Nov 2014 21:56

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