HY-2C卫星散射计海面风场产品的检验评估-海洋预报

HY-2C卫星散射计海面风场产品的检验评估

单位：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

分类号：P732

出版年·卷·期（页码）：2024·41·第二期（92-103）

摘要：

基于中国近海浮标的逐小时海面风矢量实测数据、ASCAT散射计风场数据以及欧洲中期天气预报中心的第五代全球再分析数据(ERA5)的逐小时风场数据,使用统计分析方法对HY-2C卫星散射计海面风场数据产品进行检验评估,检验使用的是2~24 m/s风速区间内的数据。结果表明:使用11个浮标共计3 351个样本数据作为真值进行检验,风速和风向的均方根误差分别为1.01 m/s和20.7°使用8 304 963个ASCAT样本数据进行检验,风速和风向的均方根误差分别为0.66 m/s和11.5°使用ERA5风场数据进行全球区域检验,风速和风向的均方根误差分别为1.05 m/s和12.0°使用ERA5风场数据进行西北太平洋区域检验,风速和风向的均方根误差分别为1.19 m/s和15.5°。由此可见,HY-2C卫星散射计海面风场产品质量的可信度较高,能够较好地满足业务化应用的精度要求。

Based on the hourly sea surface wind vector data observed by the China's offshore buoys, ASCAT scatterometer sea surface wind field data and the fifth generation of the European Center for Medium-Range Weather Forecasts reanalysis wind data(ERA5), this paper examines and evaluates the HY-2C satellite scatterometer sea surface wind field products in 2~24 m/s wind speed range by using statistical analysis. The results show that in comparison to 3 351 sample wind vector data of 11 buoys, the root mean square errors(RMSEs) of wind speed and direction are 1.01 m/s and 20.7°, respectively. When using 8 304 963 ASCAT sample wind field data for examination, the RMSEs of wind speed and direction are 0.66 m/s and 11.5 °, respectively.With respect to the ERA5 wind field data for global regional examination, the RMSEs of wind speed and direction are 1.05 m/s and 12.0°, respectively. With respect to the ERA5 wind field data for the Northwestern Pacific region examination, the RMSEs of wind speed and direction are 1.19 m/s and 15.5°, respectively. In summary, the quality of the HY-2C satellite scatterometer sea surface wind field products has a high reliability and the products can satisfy the operational precision requirement well.

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