TITLE

Validation of the Meteorological Outputs of the Canadian Regional Climate Model Using a Kriging Method: Application to Southern Quebec

AUTHOR(S)
Konan, Brou; Slivitzky, Michel; Gagnon, Patrick; Rousseau, Alain N.
PUB. DATE
September 2010
SOURCE
Canadian Water Resources Journal/Revue Canadienne des Ressources;Fall2010, Vol. 35 Issue 3, p259
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
To verify the accuracy of Regional Climate Model (RCM) simulated meteorological outputs, field observations can be used as a reference. However, the spatial scale difference between both types of data must be taken into account to allow a fair comparison. In this study, a kriging-based method is developed to compare simulated total precipitation, daily maximum and minimum temperature data from a Canadian Regional Climate Model run (CRCM4.1.1 with CLASS2.7, pilot ERA40d, Quebec domain) with in situ data from meteorological stations located in six watersheds in southern Quebec for the 1968-1999 period. Anisotropy and spatial trend are analysed for both observed and simulated data and then, the data are standardized to comparable resolutions using the kriging method. Analyses show that general spatial trends are well simulated but there are notable small scale differences. Watershed averages calculated using simulated data show that, overall, minimum temperatures are colder (with the exception of fall) and maximum temperatures are warmer than those observed. For total precipitation, winter and fall are simulated accurately (differences <10%) while differences during the spring-summer period varied between 17 and 33%. Precipitation levels in the two largest watersheds (St. Fran�ois and Chaudi�re) are generally well estimated by the CRCM run.
ACCESSION #
56097612

 

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