This study is from part of the first author’s Ph.D. work, which is supported by the Research Studentship from City University of Hong Kong and the Hong Kong Research Grants Council Grant CityU 100209. The authors thank Deborah Smith for her support of the RSS QuikSCAT data description. They would also like to offer their thanks to the editor, Professor Pat Harr, and two anonymous reviewers for their comments, which led to improvements in the manuscript.
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A threshold of 40 kt (rather than 34 kt) and a time period of 12 h (rather than every 6 h or 1 day) are set here because the best-track datasets only give 1-min MSW, which is not consistent with the QuikSCAT mean surface wind (~8–10 min) and QuikSCAT is a polar-orbiting satellite that generally has swaths twice per day (~12 h in between) over a given geographic region. Therefore, in order to have a fair count of the total possible cases, an increment in the wind speed and the matched time period should be made.