Our understanding of global climate change is mainly based on General Circulation Models (GCMs) with a relatively coarse resolution. Since climate change impacts are mainly experienced on regional scales, high-resolution climate change scenarios need to be derived from GCM simulations by downscaling. Validation of downscaling methods is crucial, but several aspects have not been systematically assessed: temporal variability from sub-daily to decadal time scales including climate change, extreme events, spatial coherence and variability, and inter-variable consistency together with the related uncertainties.
The COST Action VALUE (2012-2015) will provide a European network to validate and develop downscaling methods and improve the collaboration between the dispersed research communities and with stakeholders. The Action will sytematically compare the different downscaling approaches and assess the aspects listed above.
VALUE will deliver an assessment of end-user needs, a benchmark data set and pseudo reality for the validation, a set of validation measures, the validation of state-of-the-art methods and guidelines for stakeholders. It will guide the development of improved regional climate change scenarios for Europe and thereby be relevant for European societies and politics.
The main objective of VALUE is to establish a network to systematically validate and improve downscaling methods for climate change research. VALUE will in particular deliver an assessment of end user requirements, an inventory of downscaling methods, a set of validation measures and tailed guidelines for the use of downscaling methods. The validation will ultimately guide the development of improved local and regional-scale climate change scenarios for Europe for the 21st century, based upon the best performing downscaling methods. The aim of VALUE will be achieved by addressing the following objectives:
Consult here the official parties in the COST web.
Prof. Dr. Douglas Maraun
GEOMAR | Helmholtz Centre for Ocean Research Kiel
Düsternbrooker Weg 20
Phone: +49-431 600-4057
Fax: +49-431 600-4052