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Original Research Papers

Downscaling ECMWF seasonal precipitation forecasts in Europe using the RCA model

Authors:

E. Díez ,

Agencia Estatal de Meteorología (AEMET), 28040 Madrid, ES
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B. Orfila,

Agencia Estatal de Meteorología (AEMET), 28040 Madrid, ES
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M. D. Frías,

Department of Applied Mathematics and Computation, Universidad de Cantabria, 39005 Santander, ES
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J. Fernández,

Department of Applied Mathematics and Computation, Universidad de Cantabria, 39005 Santander, ES
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A. S. Cofiño,

Department of Applied Mathematics and Computation, Universidad de Cantabria, 39005 Santander, ES
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J. M. Gutiérrez

Instituto de Física de Cantabria (CSIC-UC), 39005 Santander, ES
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Abstract

The operational performance and usefulness of regional climate models at seasonal time scales are assessed by downscaling an ensemble of global seasonal forecasts. The Rossby Centre RCA regional model was applied to downscale a five-member ensemble from the ECMWF System3 global model in the European Atlantic domain for the period 1981–2001. One month lead time global and regional precipitation predictions were compared over Europe—and particularly over Spain—focusing the study in SON (autumn) dry events. A robust tercile-based probabilistic validation approach was applied to compare the forecasts from global and regional models, obtaining significant skill in both cases, but over a wider area for the later. Finally, we also analyse the performance of a mixed ensemble combining both forecasts.

How to Cite: Díez, E., Orfila, B., Frías, M.D., Fernández, J., Cofiño, A.S. and Gutiérrez, J.M., 2011. Downscaling ECMWF seasonal precipitation forecasts in Europe using the RCA model. Tellus A: Dynamic Meteorology and Oceanography, 63(4), pp.757–762. DOI: http://doi.org/10.1111/j.1600-0870.2011.00523.x
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  Published on 01 Jan 2011
 Accepted on 18 Mar 2011            Submitted on 25 Aug 2010

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