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| Titel |
Comparing high-resolution gridded precipitation data with satellite rainfall estimates of TRMM_3B42 over Iran |
| VerfasserIn |
S. Javanmard, A. Yatagai, M. I. Nodzu, J. Bodaghjamali, H. Kawamoto |
| 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 (2010-05-17), S.119-125 |
| Datensatznummer |
250015746
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| Publikation (Nr.) |
 copernicus.org/adgeo-25-119-2010.pdf |
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| Zusammenfassung |
| To evaluate satellite rainfall estimates of Tropical Rain
Measurement Mission (TRMM) level 3 output (3B42) (TRMM_3B42) over Iran
(20°–45° N, 40°–65° E), we compared these data with
high-resolution gridded precipitation datasets (0.25°×0.25° latitude/longitude) based on rain gauges (Iran Synoptic gauges Version 0902
(IS0902)). Spatial distribution of mean annual and mean seasonal rainfall in
both IS0902 and TRMM_3B42 from 1998 to 2006 shows two main rainfall
patterns along the Caspian Sea and over the Zagros Mountains. Scatter plots
of annual average rainfall from IS0902 versus TRMM_3B42 for each 0.25°×0.25° grid cell
over the entire country (25°–40° N,
45°–60° E), along the Caspian Sea (35°–40° N, 48°–56° E), and
over the Zagros Mountains (28°–37° N, 46°–55° E)
were derived. For the entire country, the Caspian Sea region, and the Zagros
Mountains, TRMM_3B42 underestimates mean annual precipitation by 0.17,
0.39, and 0.15 mm day−1, respectively, and the mean annual rainfall
spatial correlation coefficients are 0.77, 0.57, and 0.75, respectively. The
mean annual precipitation temporal correlation coefficient for IS0902 and
TRMM_3B42 is ~0.8 in the area along the Zagros Mountains, and ~0.6
in the Caspian Sea and desert regions. |
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