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Detailed flow, hydrometeor and lightning characteristics of an isolated thunderstorm during COPS

Schmidt, Kersten und Hagen, Martin und Höller, Hartmut und Richard, Evelyne und Volkert, Hans (2012) Detailed flow, hydrometeor and lightning characteristics of an isolated thunderstorm during COPS. Atmospheric Chemistry and Physics, 12, Seiten 6679-6698. Copernicus Publcations. DOI: 10.5194/acp-12-6679-2012 ISSN 1680-7316

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Offizielle URL: http://www.atmos-chem-phys.net/12/6679/2012/


The three-hour life-cycle of the isolated thunderstorm on 15 July 2007 during the Convective and Orographically-induced Precipitation Study (COPS) is documented in detail, with a special emphasis on the rapid development and mature phases. Remote sensing techniques as 5- min rapid scans from geostationary satellites, combined velocity retrievals from up to four Doppler-radars, the polarimetric determination of hydrometeors and spatio-temporal occurrences of lightning strokes are employed to arrive at a quantification of the physical parameters of this, during the COPS period, singular event. Inner cloud flow fields are available from radar multiple Doppler analyses at four consecutive times separated by 15 min-intervals. They contain horizontal winds of around 15ms�1 and updrafts exceeding 5ms�1, the latter collocated with lightning strokes. Reflectivity and polarimetric data indicate the existence of hail at the 2 km level around 14:40. Furthermore, polarimetric and Doppler radar variables indicate intense hydrometeor variability and turbulence corresponding to an enhanced variance of the retrieved 3-D wind fields. Profiles of flow and hydrometeor statistics over the entire cloud volume provide reference data for high-resolution numerical weather prediction runs in research mode. The study embarks from two movie-loops of geostationary satellite imagery (as Supplement), which provide an intuitive distinction of six phases making up the entire life-cycle of the thunderstorm. It concludes with a triple-image loop, juxtaposing a close-up of the cloud motion as seen by Meteosat, simulated brightness temperature (as a proxy for clouds seen by the infrared satellite channel), and a perspective view on the model generated system of cloud cells. The simulation suggests that several updrafts fed from a low level convergence line eventually removed the convective inhibition and set deep convection in motion. A shear line in the radial velocity relative to the Feldberg radar site shows good agreement beween observation and simulation, whereas the onset location of deep convection exhibits a horizontal discrepancy of 15 km. A quantitative schematic of the isolated thunderstorm synthesizes all retrieved characteristics.

Titel:Detailed flow, hydrometeor and lightning characteristics of an isolated thunderstorm during COPS
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iD
Richard, EvelyneUniv. de Toulouse III, Toulouse, FNICHT SPEZIFIZIERT
Volkert, HansDLR, IPAhttps://orcid.org/0000-0003-1688-208X
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In ISI Web of Science:Ja
DOI :10.5194/acp-12-6679-2012
Seitenbereich:Seiten 6679-6698
Verlag:Copernicus Publcations
Stichwörter:thunderstorm life cycle, radar multiple-Doppler analysis, MSG brightness temperature, lightning, COPS, Meso-NH model
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:ATM und Flugbetrieb (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AO - Luftverkehrsmanagement und Flugbetrieb
DLR - Teilgebiet (Projekt, Vorhaben):L - Klima, Wetter und Umwelt (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie
Hinterlegt von: Schmidt, Dr. Kersten
Hinterlegt am:06 Jun 2012 11:59
Letzte Änderung:08 Mär 2018 18:56

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