%0 Journal Article
%T Gradient calculation based ensemble variational method and its application to the inversion of the turbulent coefficient in atmospheric Ekman layer<br>梯度计算的集合变分方案及其在大气Ekman层湍流系数反演中的应用
%A Han Yue-Qi
%A Zhong Zhong
%A Wang Yun-Feng
%A Du Hua-Dong
%A <br>韩月琪
%A 钟中
%A 王云峰
%A 杜华栋
%J 物理学报
%D 2013
%I 
%X The accurate value of the turbulent coefficient in Ekman layer of atmosphere is quite important for the numerical weather prediction and pollutant diffusion calculation. In the paper, based on ensemble method and variational method, the ensemble variational retrieval method is proposed, and the gradient of objective function is calculated with the method. Two calculation procedures are also given based on the linear condition of forward model. The inversion numerical experiments of the turbulent coefficient using ensemble variational method and two calculation flow process are carried out, and the results show that the method has the simple and convenient characteristics, and the turbulent coefficient can be retrieved accurately by observational data.
%K gradient calculation
%K ensemble variational method
%K turbulent coefficient
%K inversion<br>梯度计算
%K 集合变分
%K 湍流系数
%K 反演
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=530695581BF857841905AA9865EF0642&yid=FF7AA908D58E97FA&iid=E158A972A605785F&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0