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| Titel |
Characterization of rainfall spatiotemporal variability over South-East France for regional climate model evaluation |
| VerfasserIn |
Stéphanie Froidurot, Gilles Molinie, Arona Diedhiou |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250089765
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| Publikation (Nr.) |
 EGU/EGU2014-9998.pdf |
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| Zusammenfassung |
| In order to evaluate Regional Climate Models (RCMs), a multi-scale cross analysis of
observed and simulated rainfall intensities is performed in a mountainous Mediterranean
region.
Rainfall organization results from various atmospheric processes occurring at different spatial
and temporal scales, from microphysics to synoptic mechanisms. The relative contribution of
each atmospheric process varies depending on the scales at which the rainfall intensity is
analyzed. Thus, a multi-scale analysis of the rainfall intensity and its structure is necessary
for a comprehensive characterization of rainfall and to retrieve the signature of the original
precipitating system.
We have built a reference rainfall database at the same spatial and temporal resolutions as
Med-CORDEX RCMs from a high density raingages network (density around 1/70 km-2).
We use geostatistical tools to spatialize these sparse raingage observations. One of the
issues is to take into account the rainfall intermittency. From this reference, we
proceed the multi-scale analysis of rainfall intensity and pattern. We notice that
rainfall intensity has a different sensitivity to spatial and to temporal aggregation.
Interaction between air dynamics and the relief is a key factor on these differences at
RCM scales. A similar analysis is carried out on the simulated rainfall in order
to evaluate Med-CORDEX RCMs with regard to the physical processes at stake. |
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