HY-2D卫星散射计海面风场产品在西北太平洋区域的适用性分析  

Applicability analysis of the HY-2D satellite scatterometer sea surface wind field product in the Northwest Pacific region

作　　者：刘晓燕[1,2,3] 张萌 林晓娟 郝赛 彭炜[1,3] LIU Xiaoyan;ZHANG Meng;LIN Xiaojuan;HAO Sai;PENG Wei(National Marine Enviroment Forecasting Center,Beijing 100081,China;Key Laboratory of Space Ocean Remote Sensing and Application,Ministry of Natural Resources,Beijing 100081,China;Key Laboratory of Marine Hazards Forecasting,Ministry of Natural Resources,Beijing 100081,China;South China Sea Sea Area and Island Center,Ministry of Natural Resources,Guangzhou 510310,China)

机构地区：[1]国家海洋环境预报中心,北京100081 [2]自然资源部空间海洋遥感与应用研究重点实验室,北京100081 [3]国家海洋环境预报中心自然资源部海洋灾害预报技术重点实验室,北京100081 [4]自然资源部南海海域海岛中心,广东广州510310

出　　处：《海洋预报》2024年第5期89-98,共10页Marine Forecasts

基　　金：自然资源部空间海洋遥感与应用研究重点实验室开放基金(202102004)。

摘　　要：基于中国近海浮标数据、欧洲中期天气预报中心第五代全球再分析资料ERA5和MetOp-B卫星散射计ASCAT海面风场数据,对HY-2D卫星散射计反演的风场数据在西北太平洋区域的质量进行了检验评估,用以分析其在该区域的适用性。统计结果表明:HY-2D风场数据与中国近海浮标数据、ERA5数据和ASCAT数据均有较好的一致性,3组检验结果的风速均方根误差分别为0.98 m/s、1.23 m/s和0.58 m/s,误差都很好地控制在2 m/s以内;风向均方根误差分别为18.8°、16.8°和12.8°,误差均控制在20°以内;HY-2D风场数据与ASCAT数据有着最好的一致性。对比HY-2D风场数据和中国近海浮标站点风矢量数据,未发现离岸距离和误差之间的明显规律。在HY-2D风场数据与ERA5和ASCAT的对比结果中,近9成数据的风速绝对误差≤2 m/s、风向绝对误差≤20°。由此可见,HY-2D卫星散射计反演的海面风场数据在西北太平洋区域质量较高,能够较好地满足业务化应用的精度要求。Based on the Chinese offshore buoy data,the European Centre for Medium-Range Weather Forecasts(ECMWF)fifth-generation global reanalysis data(ERA5),and the MetOp-B satellite scatterometer ASCAT sea surface wind field data,the quality of wind field data from the HY-2D satellite scatterometer inversion is evaluated to analyze its applicability in the Northwest Pacific region.The statistical results show that the HY-2D wind field data are in good agreement with the Chinese offshore buoy data,the ERA5 and ASCAT data.The rootmean-square errors of wind speed against the three data sets are 0.98 m/s,1.23 m/s and 0.58 m/s,and those of wind direction are 18.8°,16.8°and 12.8°,respectively.All of which are lower than 2 m/s and 20°.Comparison of wind vector data from the HY-2D and Chinese offshore buoy data does not reveal a clear relationship between offshore distance and the error.Comparison against the ERA5 and ASCAT data shows that the percentage of the data with wind speed absolute error≤2 m/s and wind direction absolute error≤20°is nearly 90%.In summary,the quality of the HY-2D scatterometer sea surface wind field in the Northwest Pacific region is high enough to satisfy the accuracy requirements of operational applications.

关 键 词：HY-2D卫星 散射计海面风场 西北太平洋 适用性 ERA5 

分 类 号：P732[天文地球—海洋科学]