利用TOPEX卫星高度计资料分析台湾岛周边海域巨浪和大风特征
The analysis of the characterstics of wind and wave fields over the surrounding waters of Taiwan Island using TOPEX satellite altimeter data
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摘要: 卫星高度计实现了对全球性或区域性的海洋参量的实时监测,TOPEX卫星高度计提供了迄今为止时间序列最长、数据质量最高的全球海面风速和有效波高的同步观测资料。利用TOPEX卫星高度计资料,分析了有效波高4m以上的巨浪在台湾岛周边海域的时空分布特征,结果表明台湾岛周边海域巨浪的分布具有明显的季节特征。每年平均有效波高最大值大多数出现在夏季,春季是1a中有效波高最小的季节,而秋季和冬季是巨浪出现频率最高的季节。波高大于6m的巨浪大都出现在台湾岛东部及东北部海域,在南部海域出现较少。Abstract: The satellite altimeter provides an efficient way for realt-ime monitoring global and regionalocea-nographic parameters.The TOPEX satellite altimeter has provided the synchronously observed data of the global sea surface wind speed and significant wave height (SWH),so far,these data have the longest time series and the best data quality.The data of the SWH and the wind speed over the surrounding waters of Taiwan Island are compared with the data from the TOPEX satellite altimeter,and the validity is analyzed from the TOPEX satellite altimeter data.Meanwhile,the characteristics of the SWH which is greater than or equal to 4 m over the surrounding waters of Taiwan Island is analyzed.It is shown that the large waves commonly appear in winter and autumn every year,and the maximum of the mean SWH often appears in summer,but it is opposite in spring.When the SWH is greater than or equal to 6 m,it appears in the surrounding waters of the east or northeast of Taiwan Island,and it less appears in the surrounding waters of the south of Taiwan Island.
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