Comparison of evaporation estimated by the HIRHAM and GWB models for present climate and climate change scenarios

Content Provider	Semantic Scholar
Author	Engeland, Kolbjørn Skaugen, T. E. Haugen, Jan Erik Beldring, Stein Førland, Eirik J.
Copyright Year	2004
Abstract	Abstract The evaporation estimated by the regional climate model HIRHAM was compared to the evaporation given by the regional hydrological model GWB for selected points in Norway, Sweden and Finland. The report starts with a brief review of important evaporation processes and how they are represented in the two models. Then the evaporation estimated by the two models were compared to evaporation observations at three locations in Sweden and Finland for present climate, before the two models were compared at six points in Norway for the present climate and the future climate simulated by dynamical downscaling of HadAm3 with emission scenarios A2 and B2. Monthly and annual average values were compared. The results show that there is a potential for improving the evaporation calculations in both models. Both models over-estimate the average annual evaporation compared to observations at the three sites in Sweden and Finland. HIRHAM over-estimates winter evaporation whereas the GWB overestimates spring and autumn evaporation, and under-estimates winter-evaporation.The differences in estimated evaporation between the two models are more important than the differences between the scenarios A2 and B2. Both models indicate that the largest increase in evaporation will be in the spring and in the autumn.The summer evaporation might decrease at many locations. The GWB indicates a much higher increase in average annual evaporation than the HIRHAM model.
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Alternate Webpage(s)	https://www.met.no/publikasjoner/met-report/met-report-2004/_/attachment/download/b3ea4682-9ce8-4082-9ad1-ed9dacf28b69:fc812847ce8e8ff8407d3f1e9a8b015c76ad8146/MET-report-17-2004.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article