船测资料与智利外海QuikSCAT风场比较分析

利用大洋渔船在智利外海观测的风场资料与QuikSCAT 10 m散射风原始轨道资料L3产品进行了比较分析。两种资料的偏差统计特征显示:①智利外海船测风速总体上高于QuikSCAT风速,船测风向总体上偏于QuikSCAT风向的左侧;②智利外海船测风场资料与QuikSCAT散射风的风速偏差集中分布在-1~1 m/s之间;风向偏差主要集中分布于-60°~-10°之间,其次为10°~60° 和-10°~10°段;③智利外海白天的风速偏差特征值均小于夜晚,昼、夜风向平均偏差数值差别很大,但昼、夜风向平均绝对偏差、均方根偏差数值相差不大;④2008年智利外海船测风场资料与QuikSCAT散射风的偏差大于其他年份的整体平均值,在高风速段风速偏差尤为明显。

Comparison between the Fishing Vessels and QuikSCAT Scatterometer Wind Data of the Offshore Chile

This paper compares the L3 product of QuikSCAT 10 m Scatterometer Winds with the fishing vessels wind data.The statistical biases between the two sets of data show that:① in general,the fishing vessels wind speed of offshore Chile is higher than QuikSCAT,and the wind direction of fishing vessels is on the left side of the QuikSCAT ;② the wind speed bias between the fishing vessels and QuikSCAT wind data is concentrated on the range of -1~1 m/s,and the wind direction bias is mainly in the range of-60°~-10°,with minor range of10°~60°and-10°°~10;③ the wind speed deviation characteristic value in the day time is better than that at night,and there is distinct difference of wind direction mean bias between day and night ,but the absolute bias and root mean square bias of wind direction are similar;④ and the biases between the fishing vessels' winds and QuikSCAT wind data in 2008 are larger than the average of other years,especially for the wind speed bias of high wind speed section.