Quantification of Optimal Choices of Parameters in Lognormal Variational Data Assimilation and Their Chaotic Behavior
Quantification of Optimal Choices of Parameters in Lognormal Variational Data Assimilation and Their Chaotic Behavior
复制标题
对数正态变分数据同化中参数最优选择的量化及其混沌行为
DOI:
10.1007/s11004-018-9765-7
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发表时间:
2019
影响因子:
2.6
通讯作者:
Jones, Andrew S.
中科院分区:
文献类型:
--
作者:
Fletcher, Steven J.;Kliewer, Anton J.;Jones, Andrew S.
An important property of variational-based data assimilation is the ability to define a functional formulation such that the minimum of that functional can be any state that is desired. Thus, it is possible to define cost functions such that the minimum of the background error component is the mean, median or the mode of a multivariate lognormal distribution, where, unlike the multivariate Gaussian distributions, these statistics are not equivalent. Therefore, for lognormal distributions it is shown here that there are regions where each one of these three statistics are optimal at minimizing the errors, given estimates of an a priori state. Also, as part of this work, a chaotic signal was detected with respect to the first guess to the Newton–Raphson solver that affect the accuracy of the solution to several decimal places.
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影响因子:
3.2
作者:
S. Fletcher;Andrew S. Jones
通讯作者:
Andrew S. Jones
影响因子:
8.9
作者:
A. Kliewer;S. Fletcher;A. S. Jones;J. Forsythe
通讯作者:
J. Forsythe
DOI:
10.1002/qj.49711247414
发表时间:
1986-10-01
影响因子:
8.9
作者:
LORENC, AC
通讯作者:
LORENC, AC
影响因子:
1.2
作者:
S. Fletcher
通讯作者:
S. Fletcher
影响因子:
8.9
作者:
S. Fletcher;M. Zupanski
通讯作者:
M. Zupanski