elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

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

Schmidt, Kersten and 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, 30. Juli - 3. Aug. 2012, Leipzig, Deutschland.

[img]
Preview
PDF
714kB

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

Abstract

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).

Item URL in elib:https://elib.dlr.de/79500/
Document Type:Conference or Workshop Item (Poster)
Title:Synergetic use of polarimetric Doppler radars at Ka- and C- band for retrieval of water drop and ice particle size distributions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schmidt, Kerstenkersten.schmidt (at) dlr.deUNSPECIFIED
Hagen, Martinmartin.hagen (at) dlr.deUNSPECIFIED
Date:2 August 2012
Journal or Publication Title:ICCP 2012
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:cloud radar spectrum, doppler radar, drop size distribution
Event Title:16th International Conference on Clouds and Precipitation
Event Location:Leipzig, Deutschland
Event Type:international Conference
Event Dates:30. Juli - 3. Aug. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Hagen, Dr.rer.nat. Martin
Deposited On:18 Dec 2012 10:13
Last Modified:31 Jul 2019 19:38

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.