大西洋波高成分研究

利用Topex／Poseidon卫星高度计1992年10月到1998年12月连续75个月，230个重复周期的有效波高资料对南北大西洋的波高成分进行了分析，结果显示频数密度峰值对应的波高成分因子在夏季为1．4左右。冬季为1．2左右，其他季节为1．3左右。7，8，9月份大西洋含涌浪的波高成分占频数密度累积率的比例约为90％左右，其中涌浪成分占优约为65％左右；其余各月占85％左右，其中涌浪成分占优约为60％左右，表明大西洋海域常年有涌浪场存在。

A STUDY ON THE DISTRIBUTION AND VARIATION OF SIGNIFICANT WAVE HEIGHT IN THE ATLANTIC OCEAN USING THE SATELLITE ALTIMETRY DATA

Data from the Topex/poseidon altimeter from October 1992 to December 1998 was used for statistical analysis of significant wave height (SWH). The researc h included work on temporal characteristics of statistical distribution of mixed wave height composition factor in the Atlantic Ocean from successive January to December periods. The results indicated that mixed wave height composition fact or occurred most frequently in summer at 1.4. In winter it was about 1.2 and 1. 3 in other seasons. During July, August and September over 90% of the waves wer e swell waves, at this time the probability of swell waves was 65 % . In the ot her months, the number was about 85 %, and the probability of swell waves is mu ch greater than that of wind waves is 60% . In other words, the swell waves exi st in the whole Atlantic Ocean perennially.