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| Titel |
A network of disdrometers to investigate the variability of the microstructure of precipitation at the radar pixel scale |
| VerfasserIn |
J. Jaffrain, A. Berne, A. Studzinski, F. Pantillon |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250028236
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| Zusammenfassung |
| The microstructure of precipitation, in particular the raindrop size distribution (DSD
hereafter), is of primary importance for quantitative interpretation of weather radar
measurements. As an indirect measurement, radar rain rate estimation depends
on the DSD via the Z-R relationship. As precipitation, DSD is characterized by a
strong variability in space and time. In order to investigate the effect of the DSD
variability at the pixel scale on radar rain rate estimation, a network of disdrometers
has been set up. It consists of about 15 optical disdrometers PARSIVEL that are
autonomous in terms of power supply (battery, solar panel) as well as data storage
(data logger). The network is designed for real-time access and monitoring of data,
favoring remote communication (radio modem and GPRS) for data transfer. The
network is deployed on EPFL campus over a typical operational radar pixel (~
1Ã1Â km) since late 2008. The first analyses highlight the uncertainty associated
with DSD measurements as well as the variability of the DSD of precipitation over
1Â km2. |
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