ASCAT洋面风资料在中国北方海域的真实性检验-海洋预报

ASCAT洋面风资料在中国北方海域的真实性检验

单位：1. 天津海洋中心气象台, 天津300074;
2. 国家气象中心, 北京100081

分类号：P732

出版年·卷·期（页码）：2014·31·第五期（8-12）

摘要：

采用北方海域6 个海洋观测站风资料对2009 年3 月—2013 年6 月ASCAT卫星反演洋面风(10 m)资料进行了检验。ASCAT反演洋面风与测站风向、风速偏差均较小, 二者风速平均偏差为0.99 m/s, ASCAT 风速略高于测站风速, 二者风向平均偏差为-12.97°, 表明ASCAT 洋面风资料在北方海域具有可信性;分风级统计表明, 在北方海域, 风力为0—7 级(0—17.1 m/s)时, 利用ASCAT 风速代表洋面风速是可行的(其中风力为4—5 级时, ASCAT 与测站风速误差最小, 为0.10 m/s), 当风力达到8级以上时ASCAT的可信度较低。

The observatory data from 6 northern China Sea ocean stations are used to validate ASCAT sea surface wind (10 m) products from March 2009 to June 2013. Results show that the differences in wind direction and speed between ASCAT and observatory data are small. The average deviation of wind speed is 0.99 m/s, and the average deviation of wind direction is only -12.97°, with ASCAT wind speed slightly higher than that of observatory data. The results indicate that ASCAT sea surface wind products in northern China Sea are credible. Classification statistics shows that: in northern China Sea, when wind speed scale is in the range of 0—7 (0— 17.1 m/s), ASCAT sea surface wind speed products can be used to represent the real wind, with the minimum deviation of 0.10 m/s when wind speed scale is 4—5 (5.5—10.7 m/s). Credibility of ASCAT products is lower when wind speed scale is above 8.

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