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| Titel |
Preliminary evaluation of polarimetric parameters from a new dual-polarization C-band weather radar in an alpine region |
| VerfasserIn |
H. Paulitsch, F. Teschl, W. L. Randeu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Precipitation: Measurement, Climatology, Remote Sensing, and Modeling (EGU Session 2009) ; Nr. 25 (2010-05-12), S.111-117 |
| Datensatznummer |
250015745
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| Publikation (Nr.) |
 copernicus.org/adgeo-25-111-2010.pdf |
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| Zusammenfassung |
| The first operational weather radar with dual polarization capabilities was
recently installed in Austria. The use of polarimetric radar variables rises
several expectations: an increased accuracy of the rain rate estimation
compared to standard Z-R relationships, a reliable use of attenuation
correction methods, and finally hydrometeor classification. In this study
the polarimetric variables of precipitation events are investigated and the
operational quality of the parameters is discussed. For the new weather
radar also several polarimetric rain rate estimators, which are based on the
horizontal polarization radar reflectivity, ZH, the differential
reflectivity, ZDR, and the specific differential propagation phase
shift, KDP, have been tested. The rain rate estimators are further
combined with an attenuation correction scheme. A comparison between radar
and rain gauge indicates that ZDR based rain rate algorithms show an
improvement over the traditional Z-R estimate. KDP based estimates do
not provide reliable results, mainly due to the fact, that the observed
KDP parameters are quite noisy. Furthermore the observed rain rates are
moderate, where KDP is less significant than in heavy rain. |
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