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| Titel |
Skewness as measure of the invariance of instantaneous renormalized drop diameter distributions – Part 2: Orographic precipitation |
| VerfasserIn |
M. Ignaccolo, C. Michele |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 2 ; Nr. 16, no. 2 (2012-02-03), S.329-343 |
| Datensatznummer |
250013167
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| Publikation (Nr.) |
 copernicus.org/hess-16-329-2012.pdf |
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| Zusammenfassung |
| Here we use the skewness parameter, and the procedure developed in
the companion paper (Ignaccolo and
De Michele, 2012), to investigate the
variability of instantaneous renormalized spectra of rain drop diameter in
presence of orographic precipitation. Disdrometer data, available at Bodega
Bay and Cazadero, California, are analyzed either as a whole, or as divided
(using the bright band echo) in precipitation intervals weakly and strongly
influenced by orography, and compared to results obtained at Darwin,
Australia. We find that also at Bodega Bay and Cazadero exists a most common
distribution of the skewness values of instantaneous spectra of drop
diameter, but peaked at values greater than 0.64, found at Darwin. No
appreciable differences are found in the skewness distributions of
precipitation weakly and strongly influenced by orography. However the
renormalized drop diameter spectra of precipitation with strong orographic
component have fatter right tail than precipitation with a weaker orographic
component. The differences between orographic and non-orographic
precipitation are investigated within the parametric space represented by
number of drops, mean value and standard deviation of drop diameter. A filter
is developed which is able to identify 1 min time intervals during which
precipitation is mostly of orographic origin. |
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