基于ASCAT微波散射计风场与NCEP再分析风场的全球海洋表面混合风场-海洋预报

基于ASCAT微波散射计风场与NCEP再分析风场的全球海洋表面混合风场

单位：国家卫星海洋应用中心, 北京 100081

分类号：P732

出版年·卷·期（页码）：2014·31·第三期（10-18）

摘要：

通过星下点的计算得出ASCAT散射计、HY-2散射计单独观测以及双星结合观测的全球覆盖率,分析了中国南海海域双星结合观测对采样率的提升。同时详细介绍了利用NCEP风场、星载微波散射计风场,用时空加权分析法结合构建混合风场的具体程序,构建的混合风场时空分辨率达到6 h、0.25°,时间序列2012年1月1日—2012年3月31日,并且用实际浮标观测数据进行了检验,得到构建的混合风场与观测数据比较一致的结果。

This paper obtains the global coverage rates of ASCAT,HY-2 scatterometers from independent observations and combined observations based on the calculation results of sub-satellite points.Specific to the South China Sea,the improvements of sampling rate through combined observation are discussed.However,the current scatterometers cannot satisfy the requirement of actual applications in spatial and temporal resolution synchronously.Therefore,it's necessary to establish blended winds products from available multiple resources to fill the data gaps in spatial or temporal part.Based on the data of NCEP winds field and the scatterometer winds field,the blended winds with resolution of 6h and 0.25° are established using the method of spatial-temporal weighted analysis.

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