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Synergetic use of polarimetric Doppler radars at Ka- and C- band for retrieval of water drop and ice particle size distributions

Schmidt, Kersten und Hagen, Martin (2012) Synergetic use of polarimetric Doppler radars at Ka- and C- band for retrieval of water drop and ice particle size distributions. In: ICCP 2012. 16th International Conference on Clouds and Precipitation, 2012-07-30 - 2012-08-03, Leipzig, Deutschland.

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Offizielle URL: http://iccp2012.tropos.de

Kurzfassung

The transition from bulk to spectral bin microphysics schemes within numerical weather prediction (NWP) models promises more realistic simulations of cloud resolving processes and finally an improving of weather forecasting quality. However the needed size distributions of water drops and ice particles were parameterized from rare observations, typically from ground based rain distrometers or aircraft in-situ measurements. The current work introduces a retrieval method to derive size distributions from synergetic use of vertical pointed Ka-band and polarimetric C-band radar. The method is based on using the full height-resolved Doppler spectra instead of mean values of reflectivity and radial velocity inside the radar bin volume. Within a Mie and T-matrix based radar forward operator, Doppler spectra were simulated from assumed size distributions, taking into account the attenuation at Ka-band. In an iterative way, the parameters of distributions were varied until differences between simulated and observed radar profiles could minimized. Additional data e.g. from radiosounding and SODAR wind profilers were used to estimate and minimize the most relevant error sources expected from vertical air motion and turbulence. First results were achieved from a case study of 8th July 2007 during the Convection and Orographically Induced Precipitation Study (COPS).

elib-URL des Eintrags:https://elib.dlr.de/79500/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Synergetic use of polarimetric Doppler radars at Ka- and C- band for retrieval of water drop and ice particle size distributions
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schmidt, Kerstenkersten.schmidt (at) dlr.dehttps://orcid.org/0000-0001-7896-908XNICHT SPEZIFIZIERT
Hagen, Martinmartin.hagen (at) dlr.dehttps://orcid.org/0000-0003-4714-0775NICHT SPEZIFIZIERT
Datum:2 August 2012
Erschienen in:ICCP 2012
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:cloud radar spectrum, doppler radar, drop size distribution
Veranstaltungstitel:16th International Conference on Clouds and Precipitation
Veranstaltungsort:Leipzig, Deutschland
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:30 Juli 2012
Veranstaltungsende:3 August 2012
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Atmosphären- und Klimaforschung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie
Hinterlegt von: Hagen, Dr.rer.nat. Martin
Hinterlegt am:18 Dez 2012 10:13
Letzte Änderung:24 Apr 2024 19:46

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