On gauss-verifiability of optimal solutions in variational data assimilation problems with nonlinear dynamics
On gauss-verifiability of optimal solutions in variational data assimilation problems with nonlinear dynamics
复制标题
非线性动力学变分数据同化问题最优解的高斯可验证性
DOI:
10.1016/j.jcp.2014.09.032
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发表时间:
2015
影响因子:
4.1
通讯作者:
Gejadze I
中科院分区:
文献类型:
--
作者:
Gejadze I
The problem of variational data assimilation for a nonlinear evolution model is formulated as an optimal control problem to find the initial condition. The optimal solution (analysis) error arises due to the errors in the input data (background and observation errors). Under the gaussian assumption the confidence region for the optimal solution error can be constructed using the analysis error covariance. Due to nonlinearity of the model equations the analysis pdf deviates from the gaussian. To a certain extent the gaussian confidence region built on a basis of a non-gaussian analysis pdf remains useful. In this case we say that the optimal solution is “gauss-verifiable”. When the deviation from the gaussian further extends, the optimal solutions may still be partially (locally) gauss-verifiable. The aim of this paper is to develop a diagnostics to check gauss-verifiability of the optimal solution. We introduce a relevant measure and propose a method for computing decomposition of this measure into the sum of components associated to the corresponding elements of the control vector. This approach has the potential for implementation in realistic high-dimensional cases. Numerical experiments for the 1D Burgers equation illustrate and justify the presented theory
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DOI:
10.1016/s1573-4412(83)01010-7
发表时间:
1983
期刊:
Handbook of Econometrics
影响因子:
--
作者:
T. Amemiya
通讯作者:
T. Amemiya
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
I. Gejadze;V. Shutyaevb;F.‐X. Le Dimetc
通讯作者:
F.‐X. Le Dimetc
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
M. Polis;R. Goodson
通讯作者:
R. Goodson
DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
M. Delfour;S. Mitter
通讯作者:
S. Mitter
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
關谷暁子;杉森公一;井下千以子;坂本辰朗
通讯作者:
坂本辰朗