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Daily and monthly temperature and precipitation statistics as performance indicators for regional climate models
SMHI, Forskningsavdelningen, Klimatforskning - Rossby Centre.ORCID-id: 0000-0002-6495-1038
Vise andre og tillknytning
2010 (engelsk)Inngår i: Climate Research (CR), ISSN 0936-577X, E-ISSN 1616-1572, Vol. 44, nr 2-3, s. 135-150Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We evaluated daily and monthly statistics of maximum and minimum temperatures and precipitation in an ensemble of 16 regional climate models (RCMs) forced by boundary conditions from reanalysis data for 1961-1990. A high-resolution gridded observational data set for land areas in Europe was used. Skill scores were calculated based on the match of simulated and observed empirical probability density functions. The evaluation for different variables, seasons and regions showed that some models were better/worse than others in an overall sense. It also showed that no model that was best/worst in all variables, seasons or regions. Biases in daily precipitation were most pronounced in the wettest part of the probability distribution where the RCMs tended to overestimate precipitation compared to observations. We also applied the skill scores as weights used to calculate weighted ensemble means of the variables. We found that weighted ensemble means were slightly better in comparison to observations than corresponding unweighted ensemble means for most seasons, regions and variables. A number of sensitivity tests showed that the weights were highly sensitive to the choice of skill score metric and data sets involved in the comparison.

sted, utgiver, år, opplag, sider
2010. Vol. 44, nr 2-3, s. 135-150
Emneord [en]
Regional climate models, Probability distributions, Skill score metrics, Weighted ensemble, Europe
HSV kategori
Forskningsprogram
Klimat
Identifikatorer
URN: urn:nbn:se:smhi:diva-590DOI: 10.3354/cr00932ISI: 000285426000003OAI: oai:DiVA.org:smhi-590DiVA, id: diva2:806259
Tilgjengelig fra: 2015-04-20 Laget: 2015-04-20 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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