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Applicability of cumulus convective parameter schemes in RegCM3 to the rainfall over the Longitudinal Range-Gorge Region

DOI: 10.1007/s11434-007-7015-3

Keywords: RegCM3,spline interpolation,rainfall over Longitudinal Range-Gorge Region,climate simulation

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Abstract:

To test the applicability of cumulus convective parameter schemes in RegCM3 to the rainfall over the Longitudinal Range-Gorge Region (LRGR), the May and the summer rainfalls from 1982 to 2001 were simulated with different cumulus convective parameter schemes in RegCM3. The results of quantitative analysis contrasting simulation rainfall with observational one indicate that Fritsch-Chappell cumulus convective parameter scheme has the best simulation ability to the 20-year total May rainfall over LRGR, and the simulation ability of Anthes-Kuo cumulus convective parameter scheme takes the second place. Anthes-Kuo cumulus convective parameter scheme has the best simulation ability to the 20-year total summer rainfall over LRGR, and the simulation ability of Fritsch-Chappell gets the second place. The total rainfall simulated over LRGR is less than the observational one. The result of simulating interannual variation of May and summer rainfalls over LRGR is almost the same as that of simulating 20-year total rainfall. The Anthes-Kuo and the Fritsch-Chappell cumulus convective parameter schemes adapt to describing cumulus convective process in May and summer over LRGR.

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