HY-2A散射计风场在南海海域的检验和分析  

Validation and analysis of wind field from HY-2A scatterometer in the South China Sea

作　　者：仇月萍[1] 许大志 陆希 QIU Yue-ping;XU Da-zhi;LU Xi(South China Sea Marine Prediction Center,State Oceanic Administration,Guangzhou 510310 China;School of Atmospheric Sciences,Sun Yat-Sen University,Guangzhou 510275 China)

机构地区：[1]国家海洋局南海预报中心,广东广州510310 [2]中山大学大气科学学院,广东广州510275

出　　处：《海洋预报》2018年第4期25-33,共9页Marine Forecasts

基　　金：海洋公益性科研专项(201505014);海洋重大灾害预报技术研究与示范应用(2016YFC1401503);国家重点研发计划项目(2017YFC1404700);教育部留学回国人员科研启动基金(教外司留[2015]311);广东省科技发展专项

摘　　要：利用南海浮标及海洋观测站的实测资料作为真实值对HY-2A散射计反演的风矢量作多角度对比分析,结果表明:HY-2A散射计风速与浮标(海洋站)实测风速数据具有良好的相关性,散射计观测风速普遍大于浮标(海洋站)实测风速;风速误差符合正态分布,风力≤3级时,风向的平均绝对误差最大;4~5级时风速平均偏差和平均绝对偏差均最小。逐月统计发现:1—3月的风速平均偏差最小,两者基本吻合。7—9月的风速平均偏差最大,12月的风向平均偏差最小。另外,东北向的风速平均偏差最小,西北向风速平均偏差最大;远海站点的风速和风向检验误差均小于近海站点。以上结论表明HY-2A散射计风场资料在南海海域具有可信性,为HY-2A散射计风场在南海的应用和研究提供依据。The observation data from buoys and Ocean stations in the South China Sea （SCS） is used to evaluate and analyze the wind vector from HY-2A scatterometer. The results show： the wind speed values from HY-2A generally perform higher than the observed data, while there still exists a good correlation between satellite and in-situ data. The wind speed error is normal distribution. The error of wind direction appears different distribution features under different wind power level. The mean absolute error reaches the maximum value when the wind force ~〈3 level, while the mean bias and mean absolute bias are the smallest at 4-5 level. The wind speed and direction error presents seasonal variation, with the lowest speed bias value from January to March and highest from July to September, and the lowest mean bias value for wind direction at December. The mean bias of wind speed mean has the smallest value under northeast direction, and reaches at the biggest value under northwest direction. The error for wind speed and wind direction at offshore site are less than the onshore site. The wind data of HY-2A scattering meter have credibility in the SCS and provide basis for the application and research of HY-2A scattering meter wind field in the SCS.

关 键 词：HY-2A 海面风 南海 检验 

分 类 号：P732.1[天文地球—海洋科学]