%0 Journal Article
%T On the 4D Variational Data Assimilation with Constraint Conditions<br>具约束条件的四维变分资料同化问题
%A Zhu Keyun
%A <br>Zhu
%A Keyun
%J 大气科学进展
%D 2001
%I 
%X An investigation is carried out on the problem involved in 4D variational data assimilation (VDA) with constraint conditions based on a finite-element shallow-water equation model. In the investigation, the adjoint technology, penalty method and augmented Lagrangian method are used in constraint optimization field to minimize the defined constraint objective functions. The results of the numerical experiments show that the optimal solutions are obtained if the functions reach the minima. VDA with constraint conditions controlling the growth of gravity oscillations is efficient to eliminate perturbation and produces optimal initial field. It seems that this method can also be applied to the problem in numerical weather prediction.
%K Variational data assimilation
%K Constraint conditions
%K Penalty methods
%K finite-element model<br>变分资料同化
%K 约束条件
%K 罚函数法
%K 有限元模式
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=5434AFBF6CB6E7E8D67733B541F211C7&aid=4990FAE468ECAB710F1FFF7537A13714&yid=14E7EF987E4155E6&vid=13553B2D12F347E8&iid=B31275AF3241DB2D&sid=8FC26EAE44BDA92A&eid=F9AB8F3D624A89DB&journal_id=0256-1530&journal_name=大气科学进展&referenced_num=2&reference_num=15