利用TOPEX卫星高度计资料分析东中国海的风、浪场特征

利用TOPEX卫星高度计和日本气象厅浮标观测资料,对东中国海的有效波高和风速进行比较,分析了卫星高度计资料的有效性。利用有效波高和风速的3种概率密度函数分布,结合TOPEX卫星高度计资料,并采用最大似然方法对统计分布参数进行估计,结果表明,有效波高的对数-正态概率密度分布与观测资料的直方图在有效波高的整个范围内符合较好,风速的直方图与Weibul概率密度分布符合较好。同时,分析了有效波高大于4 m的巨浪在东中国海的时空分布特征,表明巨浪多出现在冬、秋两季,平均有效波高最大值出现在夏季,且主要分布在东中国海东南部。

The analysis of the characteristic of the wind and wave fields over the East China Sea by using TOPEX satellite altimeter data

The data of the significant wave height(SWH) and the wind speed from TOPEX satellite altimeters are compared with the data from the buoy and the validity of data from TOPEX is analyzed.The three probability density function distributions of the SWH and wind speed are used.Based on the data from TOPEX altimeter,the parameters for the statistical distributions are calculated by using the method of Maximum Likelihood Estimation.It shows that the lognormal probability density distribution of the SWH is in a well agreement with the histogram of the observed data in the whole scope,and the histogram of the measured wind speed is in a well agreement with the Weibull probability density distribution.At the same time,the characteristic of the wave the SWH of which is more than four meters over the East China Sea is analyzed and it was shown that the large waves commonly appear in winter and autumn,which maximum values of the mean SWH appear in summer, and mainly distribute over the southeast of the East China Sea.