卫星遥感合成数据CCMP和两种再分析风速数据在中国近海的比较研究

A comparative study on offshore CCMP and two reanalyzing wind speed data of China

本文选取卫星风速数据CCMP作为主要数据与再分析风速数据ERA、ICOADS进行比较分析,目的是为了验证我国近海卫星遥感数据的合理性,从而为我国近海风速气候区划图的绘制提供数据支撑,研究结论为:CCMP总体小于ERA约1.0 m/s;比ICOADS小10%~20%,在台海一带则相差40%以上。经研究,CCMP卫星遥感风速数据与洋面观测数据ICOADS更贴近,同时补足了ICOADS非船舶航线数据数量缺乏的问题,但在渤海、台湾海峡等海域存在空间分布不合理的情况。

In this study,we selected the satellite wind speed data CCMP as the main data to compare these data with the reanalyzing wind speed data ERA and ICOADS to verify the rationality of the offshore satellite remote sensing data of China,and provide a data support for drawing the offshore wind speed climate zoning map of China.We found that the CCMP is generally less than ERA by about 1.O m/s.In comparison with ICOADS,it was 10~20%smaller.In Taiwan Strait region,the difference is over 40%.The CCMP satellite remote sensing wind speed data are closer to the ocean surface observation data ICOADS,and these data aid to overcome the lack of data of the non-ship routes of ICOADS.Unfortunately,unreasonable spatial distribution was also found in Bohai Sea,Taiwan Strait among others.