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| Titel |
Study of the precipitation evolution in Catalonia using a mesoscale model (1971–2000) |
| VerfasserIn |
A. Barrera-Escoda, J. Cunillera |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: 11th EGU Plinius Conference on Mediterranean Storms (2009) ; Nr. 26 (2010-06-30), S.1-6 |
| Datensatznummer |
250015972
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| Publikation (Nr.) |
 copernicus.org/adgeo-26-1-2010.pdf |
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| Zusammenfassung |
In this work the MM5 mesoscale model is used in order to analyse the temporal
evolution of the precipitation for the period 1971–2000 in Catalonia (NE
Iberian Peninsula). Three one-way nested domains with 135, 45 and
15 km horizontal grid resolution and 23 vertical levels have been
used. The simulation is performed nesting MM5 into the ERA40 reanalyses.
Dynamical nudging is applied to the first domain. However, nudging is not
applied in the second and third domains. In order to assess the performance
of the developed methodology (main spatio-temporal precipitation
characteristics), the results obtained in each simulation are compared with
those obtained from ERA40 and observational data.
The results show a climatologically reliable distribution of the simulated
precipitation spatial patterns for annual, semi-annual, spring and summer
precipitation compared to those obtained from 1100 rain gauges covering the
whole study area. For winter and autumn the goodness of the results is much
lower. Furthermore, the results for 15-km outputs are better than the
45-km ones. The simulations also reproduce well the evolution of
annual anomalies for Catalonia and the probability density function (PDF) of
monthly mean precipitation. They also improve the precipitation outputs from
ERA40, which present an important negative trend and a drier PDF for the
period 1971–2000. On the other hand, extreme values are not well reproduced
by the simulation. Despite this fact, hydric extremes derived from extreme
values (i.e. extreme rainy days and flood records) are well captured by the
model. |
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