The authors would like to thank NCEP–NCAR for providing the reanalysis data, the Hong Kong Observatory for the rainfall data for Hong Kong, and the National Climate Center of China for providing the rainfall data for other stations in China. Thanks are extended to Mr. K. Cheung and Mr. K. S. Liu for their help in extracting the data. Comments from the two anonymous reviewers are gratefully acknowledged.
This research is sponsored by the Research Grant Council of the Universities Grants Committee of Hong Kong Grant 9040259.
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