FY-3E海面风矢量产品质量评估分析-海洋预报

FY-3E海面风矢量产品质量评估分析

单位：1. 国家气象信息中心, 北京 100081;
2. 中国气象局气象干部培训学院, 北京 100081;
3. 北京市海淀区气象局, 北京 100080

分类号：P732

出版年·卷·期（页码）：2025·42·第五期（11-21）

摘要：

为评估风云三号E星（FY-3E）海面风矢量产品质量，利用浮标风场观测及海洋二号B星（HY-2B）海面风产品对FY-3E海面风进行验证。结果表明：相较于浮标观测，FY-3E的C波段、Ku波段及双波段海面风速均呈系统性负偏差，均方根误差（RMSE）分别为1.85 m/s、1.52 m/s和1.54 m/s，风向RMSE分别为23.17°、22.47°和22.77°。空间分布上，热带太平洋地区风速RMSE较大，近海海域风向RMSE较大。FY-3E海面风产品总体满足风速RMSE小于2 m/s、风向RMSE小于25°的精度设计指标，且Ku波段产品质量略优于双波段，明显优于C波段。FY-3E与HY-2B海面风产品的一致性较好，二者风速、风向线性回归系数均大于0.9，平均偏差均接近0,RMSE分别为0.48 m/s和10.50°，其RMSE大值区主要位于赤道附近海域。

In order to understand the quality of the ocean wind vector product（OVW） of Fengyun-3E satellite（FY-3E）, buoy observations and the sea surface wind product of HaiYang-2B satellite（HY-2B） were used to evaluate the quality of FY-3E/OVW. The results show that: compared with buoy observations, the root mean square errors（RMSEs） of wind speeds in the C-band, Ku band, and dual band of FY-3E/OVW are 1.85 m/s, 1.52m/s, and 1.54 m/s, respectively, showing a systematic negative deviation, and the RMSEs of wind directions are23.17°, 22.47°, and 22.77°, respectively. The wind speed deviation is larger in the tropical Pacific, and the wind direction deviation is larger in the nearshore areas. Overall, FY-3E/OVW meets the design criteria of wind speed and direction with RMSEs less than 2 m/s and 25°. The quality of Ku band products is slightly better than that of dual band products and significantly better than that of C-band products. The consistency between FY-3E and HY-2B ocean wind vector products is good, with linear regression coefficients of wind speed and direction both exceeding 0.9, mean error close to 0 and RMSE of 0.48 m/s and 10.50°. The regions with significant differences locate in the equatorial areas.

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