Effects of sample density on the assimilation performance of an explicit four-dimensional variational data assimilation method

查看全文 作　　者：TIAN [1]XiangJun;XIE [1]ZhengHui

机构地区：[1]ICCES/LASE,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Science China Earth Sciences》索引2009年第52卷第11期,共8页

基　　金：Supported by National Natural Science Foundation of China (Grant No. 40705035);National High Technology Research and Development Program of China (Grant Nos. 2007AA12Z144 and 2009AA12Z129);Chinese COPES Project (Grant No. GYHY200706005); the National Basic Research Program (Grant Nos. 2009CB421407 and 2005CB321703) 摘　　要：The concepts of sample sphere radius and sample density are proposed in this paper to help illustrate that different vector transformations result in diverse sample density with the same sample ensemble, which finally affects their assimilation performance. Several numerical experiments using a onedimensional (1-D) soil water equation and synthetic observations are conducted to evaluate this new theory in land data assimilation. 关键词：POD/SVD-E4DVAR data ASSIMILATION SAMPLE density

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Effects of sample density on the assimilation performance of an explicit four-dimensional variational data assimilation method

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