Three archived reanalysis wind vectors at 10 m height in the wind speed range of 2–15 m/s, namely, the second version of the National Centres for Environmental Prediction (NCEP) Climate Forecast System Reanalysis (CFSv2), European Centre for Medium-Range Weather Forecasting Interim Reanalysis (ERA-I) and NCEP-Department of Energy (DOE) Reanalysis 2 (NCEP-2) products, are evaluated by a comparison with the winds measured by moored buoys in coastal regions of the South China Sea (SCS). The buoy data are first quality controlled by extensive techniques that help eliminate degraded measurements. The evaluation results reveal that the CFSv2 wind vectors are most consistent with the buoy winds (with average biases of 0.01 m/s and 1.76°). The ERA-I winds significantly underestimate the buoy wind speed (with an average bias of −1.57 m/s), while the statistical errors in the NCEP-2 wind direction have the largest magnitude. The diagnosis of the reanalysis wind errors shows the residuals of all three reanalysis wind speeds (reanalysis-buoy) decrease with increasing buoy wind speed, suggesting a narrower wind speed range than that of the observations. Moreover, wind direction errors are examined to depend on the magnitude of the wind speed and the wind speed biases. In general, the evaluation of three reanalysis wind products demonstrates that CFSv2 wind vectors are the closest to the winds along the north coast of the SCS and are sufficiently accurate to be used in numerical models.

三个存档的重新分析风向矢量，风速在2-15 m / s范围内，高度为10 m，分别是国家环境预测中心（NCEP）气候预报系统再分析（CFSv2）的第二版，通过与南海沿岸地区系泊浮标测得的风进行比较，评估了范围天气预报中期再分析（ERA-I）和NCEP-能源部（DOE）再分析2（NCEP-2）产品。 ）。浮标数据是通过广泛的技术来进行质量控制的，这些技术可以帮助消除降低的测量值。评估结果表明，CFSv2风向矢量与浮标风最一致（平均偏差为0.01 m / s和1.76°）。ERA-I风大大低估了浮标风速（平均偏差为-1.57 m / s），而NCEP-2风向的统计误差幅度最大。重新分析风速误差的诊断显示，所有三个重新分析风速（重新分析浮标）的残差都随着浮标风速的增加而降低，这表明风速范围比观测值窄。此外，检查风向误差以取决于风速的大小和风速偏差。总的来说，对三种再分析风产品的评估表明，CFSv2风矢量最接近沿南海北部海岸的风，并且足够准确，可用于数值模型。重新分析风速误差的诊断显示，所有三个重新分析风速（重新分析浮标）的残差都随着浮标风速的增加而降低，这表明风速范围比观测值窄。此外，检查风向误差以取决于风速的大小和风速偏差。总的来说，对三种再分析风产品的评估表明，CFSv2风矢量最接近沿南海北部海岸的风，并且足够准确，可用于数值模型。重新分析风速误差的诊断显示，所有三个重新分析风速（重新分析浮标）的残差都随着浮标风速的增加而降低，这表明风速范围比观测值窄。此外，检查风向误差以取决于风速的大小和风速偏差。总的来说，对三种再分析风产品的评估表明，CFSv2风矢量最接近沿南海北部海岸的风，并且足够准确，可用于数值模型。