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Results of the coordinated regional climate downscaling experiment using WRF (CORWES project)

The CORWES project (Coordinated regional climate downscaling experiment using WRF: a contribution to the CORDEX initiative by the Spanish WRF community, 2011-2014) aimed at contributing to the global CORDEX effort using the Weather Research and Forecasting (WRF) model. Among other goals, an update of the climate change scenarios over Spain, from the AR4/CMIP3 forcing (ENSEMBLES, ESCENA) to the AR5/CMIP5, was planned.
The main results of the project will be presented. These include mainly evaluation studies, which provide context for the future climate scenarios. Multi-physics ensembles have been widely used along with multi-model ensembles produced by the CORDEX community. The evaluation was carried out against process-related variables using basic measures. This procedure revealed important biases, not only in surface variables but also in key variables regarding the energy flux. Multi-physics ensembles are an important tool to address model biases and to aid in model development, in contrast to multi-model ensembles of opportunity. The role of increased model resolution was also analysed over Spain using the Spain011/044 as reference data set, revealing very limited improvement with resolution in standard evaluation scores.
Two of the main challenges of the project were the coupling of WRF with an interactive ocean component and the use of geographically distributed computing resources to accomplish regional climate simulations. The advances in these areas within CORWES will also be presented.
Finally, the future scenarios available for Iberia will be presented from the perspective of the European and African CORDEX domains.

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