Twin experiments with the equivalent weights particle filter and HadCM3
Twin experiments with the equivalent weights particle filter and HadCM3
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DOI：
10.1002/qj.2621
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发表时间：
2015-10-01
影响因子：
8.9
通讯作者：
van Leeuwen, P. J.
中科院分区：
文献类型：
--
作者：
Browne, P. A.;van Leeuwen, P. J.
本文研究了粒子滤波在全尺度海气耦合环流模式资料同化中的应用。合成孪生实验进行评估的等效权重滤波器在这样一个高维系统的性能。人工二维海表温度场是每天观测的资料。结果给出了不同的自由参数值的方法。滤波器性能的度量是均方根误差、模型中各个变量的轨迹和秩直方图。过滤器退化没有观察到的过滤器的性能取决于在合奏保持最大扩展的能力。
This article investigates the use of a particle filter for data assimilation with a full-scale coupled ocean-atmosphere general circulation model. Synthetic twin experiments are performed to assess the performance of the equivalent weights filter in such a high-dimensional system. Artificial two-dimensional sea surface temperature fields are used as observational data every day. Results are presented for different values of the free parameters in the method. Measures of the performance of the filter are root mean square errors, trajectories of individual variables in the model and rank histograms. Filter degeneracy is not observed and the performance of the filter is shown to depend on the ability to keep maximum spread in the ensemble.