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| Titel |
Sampling errors in rainfall measurements by weather radar |
| VerfasserIn |
F. Piccolo, G. B. Chirico |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 6th Plinius Conference on Mediterranean Storms (2004) ; Nr. 2 (2005-05-13), S.151-155 |
| Datensatznummer |
250000312
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| Publikation (Nr.) |
 copernicus.org/adgeo-2-151-2005.pdf |
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| Zusammenfassung |
| Radar rainfall data are affected by several types of error. Beside the error
in the measurement of the rainfall reflectivity and its transformation into
rainfall intensity, random errors can be generated by the temporal spacing
of the radar scans. The aim of this work is to analize the sensitivity of
the estimated rainfall maps to the radar sampling interval, i.e. the time
interval between two consecutive radar scans. This analysis has been
performed employing data collected with a polarimetric C-band radar in Rome,
Italy. The radar data consist of reflectivity maps with a sampling interval
of 1min and a spatial resolution of 300m, covering an area of 1296km2.
The transformation of the reflectivity maps in rainfall fields has
been validated against rainfall data collected by a network of 14 raingauges
distributed across the study area. Accumulated rainfall maps have been
calculated for different spatial resolutions (from 300m to 2400m) and
different sampling intervals (from 1min to 16min). The observed
differences between the estimated rainfall maps are significant, showing
that the sampling interval can be an important source of error in radar
rainfall measurements. |
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