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| Titel |
A high resolution climatology of precipitation and deep convection over the Mediterranean region from operational satellite microwave data: development and application to the evaluation of model uncertainties |
| VerfasserIn |
C. Claud, B. Alhammoud, B. M. Funatsu, C. Lebeaupin Brossier, J.-P. Chaboureau, K. Béranger, P. Drobinski |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 3 ; Nr. 12, no. 3 (2012-03-23), S.785-798 |
| Datensatznummer |
250010620
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| Publikation (Nr.) |
 copernicus.org/nhess-12-785-2012.pdf |
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| Zusammenfassung |
| A new precipitation and convection dataset for the Mediterranean Basin,
derived from operational satellite microwave data is documented. The dataset
is derived from diagnostics that rely on brightness temperatures measured
since 1999 in the water vapour absorption line (183–191 GHz). The dataset
consists of twice-daily (a.m. and p.m.) and monthly maps of precipitation and
convection occurrences on a 0.2° lat × 0.2° long grid for the area
25°–60° N, 10° W–50° E. The instruments used so far are the
AMSU-B sensor on the NOAA-15 to -17 satellites, and the MHS sensor on the
NOAA-18 and -19 and METOP-2 satellites, with precipitation and convection
available separately for the different sensors. The slightly different
radiometric characteristics of MHS compared to AMSU-B do not affect
significantly the continuity of the dataset. Precipitation and convection
data from different sensors on different satellites are remarkably
consistent, with generally small biases between the instruments. When larger
biases appear, they can be explained either by the drifts in the satellite
orbit, scan asymmetry, or temporal aliasing from insufficiently resolving
the diurnal cycle of precipitation and convection. After a description of
climatological aspects of rain and deep convection occurrence, the interest
of this dataset to evaluate model uncertainties for simulating a high-impact
weather event and for climatic regional runs over this area is illustrated. |
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