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Doppler radar observation, CG lightning activity and aerial survey of a multiple downburst in southern Germany on 23 March 2001

Dotzek, Nikolai und Lang, Peter und Hagen, Martin und Fehr, Thorsten und Hellmiss, Werner (2007) Doppler radar observation, CG lightning activity and aerial survey of a multiple downburst in southern Germany on 23 March 2001. Atmospheric Research, 83, Seiten 519-533. DOI: 10.1016/j.atmosres.2005.08.016.

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Offizielle URL: http://dx.doi.org/10.1016/j.atmosres.2005.08.016

Kurzfassung

Two downburst events from one thunderstorm are investigated, which occurred on 23 March 2001, in Germany's climatologic annual minimum of downburst activity. Observations by two Doppler radars are combined with hail reports, ground lightning detection and an aerial survey conducted after the event. The downburst-producing storm had formed at a synoptic convergence line within the warm sector of a cyclone. It had a remarkably high propagation speed of up to 31 m s−1 corresponding to the midtropospheric flow. Thus, by superposition with the storm motion, even two weak downbursts were sufficient to cause the observed damage of F1 and F2 intensity, respectively. While in its late stages, the storm was dynamically characterized by lower- and midtropospheric divergence; at about the time of the first downburst, a mesocyclonic vortex signature was verified. Aside from midtropospheric dry air entrainment, a thermodynamic explanation for the triggering of the two downbursts by melting of small hail according to recent findings by Atlas et al. [Atlas, D., Ulbrich, C.W., Williams, C.R., 2004. Physical origin of a wet microburst: observations and theory. J. Atmos. Sci. 61, 1186–1196] appears probable. Despite the lack of warnings to the public, the storm's potential for hail and strong straight-line winds was detected by the German weather service radar software CONRAD more than a half hour before the downbursts occurred.

Dokumentart:Zeitschriftenbeitrag
Titel:Doppler radar observation, CG lightning activity and aerial survey of a multiple downburst in southern Germany on 23 March 2001
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Dotzek, NikolaiNICHT SPEZIFIZIERT
Lang, PeterDWD MOHP, Hohenpeißenberg
Hagen, MartinNICHT SPEZIFIZIERT
Fehr, ThorstenESA-ESRIN, Frascati, I
Hellmiss, WernerDWD, München
Datum:2007
Erschienen in:Atmospheric Research
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:83
DOI :10.1016/j.atmosres.2005.08.016
Seitenbereich:Seiten 519-533
Status:veröffentlicht
Stichwörter:Thunderstorm, Downburst, Radar, Lightning, Aerial survey
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 > Dynamik der Atmosphäre
Hinterlegt von: Dr.rer.nat. Nikolai Dotzek
Hinterlegt am:22 Feb 2007
Letzte Änderung:20 Okt 2014 14:31

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