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海洋通报  2011 

基于扩散滤波的多尺度三维变分研究

DOI: 10.11840/j.issn.1001-6392.2011.2.007

Keywords: 三维变分,数据同化,各向异性,递归滤波,扩散方程

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Abstract:

将扩散方程引入三维变分分析,揭示了传统3D-VAR不能有效提取多尺度观测信息的根本原因,即观测导致的目标函数梯度在空间的不连续分布。将扩散滤波融入基于梯度的最优化算法,发展了基于扩散滤波的多尺度3D-VAR。海表面温度数据同化试验结果表明,新方法可从长波至短波有效地提取多尺度的观测信息。

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