文章摘要
张增海1,曲荣强2,刘涛1,王海平1,杨正龙1.环渤海海域卫星反演风与站点观测风对比分析[J].海洋气象学报,2018,38(3):30-38
环渤海海域卫星反演风与站点观测风对比分析
Comparison between the satellite retrieval wind and the observed wind over the Bohai Sea region
投稿时间:2018-04-25  修订日期:2018-06-14
DOI:10.19513/j.cnki.issn2096-3599.2018.03.004
中文关键词: 渤海  ASCAT  卫星反演风  站点风
英文关键词: the Bohai Sea  ASCAT  satellite retrieval sea wind  observed wind
基金项目:环渤海区域科技协同创新基金项目(QYXM201605);国家气象中心预报员专项(Y201709)
作者单位
张增海1,曲荣强2,刘涛1,王海平1,杨正龙1 (1. 国家气象中心北京 100081 2. 辽宁省气象台辽宁 沈阳 110166) 
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中文摘要:
      选用了布设在渤海海域的浮标、平台、海岛共计18个站点,利用COARE算法进行站点风速的高度修正,对ASCAT卫星反演风与三类站点风进行对比分析。统计检验结果表明,卫星风与站点风相比,整体上卫星风速比站点风速大。浮标与卫星的风速差最小,而平台和海岛与卫星的风速差较大。风向对比结果显示,卫星风与站点风的风向平均偏差都很小,但均方根偏差却比较大。随着风速的增加,三类站点的风速平均偏差都是由大到小变化,由正值变化为负值,弱风速的时候卫星风速大于站点风速,高风速的时候卫星风速小于站点风速;风速的均方根偏差则相对稳定。卫星风与站点风的风向均方根偏差随着风速的增加而减小,在不同的方向上,风速偏差和风向偏差等统计量的区别较小。随季节的变化中,平台和海岛站的风速与卫星风速的平均偏差秋冬季大而春夏季小。
英文摘要:
      A total of 18 stations, such as buoys, platforms and island stations in the Bohai Sea region are selected. The observed wind speed data at different anemometer height are adjusted to a reference level-10 m using COARE algorithm. The ASCAT retrieval sea wind is compared with the observed wind at stations. The statistical results show that the satellite wind speed is larger than that from observations of the three types of stations on the whole. The wind speed difference between buoys and the satellite is the smallest, while the difference is larger between platforms and island stations. The comparison of wind directions shows that the mean deviation of wind directions from the satellite and stations is very small, but the root mean square deviation (RMSD) is large. With the increase of wind speed, the mean speed deviation of the three types of stations decreases from positive to negative. The satellite wind speed is larger than that of stations during low wind speed, but the former is smaller than the latter during high wind speed. The RMSD of wind speed is relatively stable in regions of different wind speed. The RMSD of wind directions from the satellite and stations decreases with the increase of wind speed. The distinction between wind speed difference and wind direction deviation is small in different directions. For the seasonal variation, the mean difference between platforms/islands and the satellite is large in autumn and winter, but small in spring and summer.
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