%0 Journal Article
%T Study of the Optimal Precursors for Blocking Events
%A JIANG Zhina
%A LUO Dehai
%A <br>JIANG Zhin
%A LUO Dehai
%J 大气科学进展
%D 2005
%I 
%X The precursors of dipole blocking are obtained by a numerical approach based upon a quasi-geostrophic barotropic planetary- to synoptic-scale interaction model without topography and with a localized synopticscale wave-maker. The optimization problem related to the precursors of blocking is formulated and the nonlinear optimization method is used to examine the optimal synoptic-scale initial field successfully. The results show that the prominent characteristics of the optimal synoptic-scale initial field are that the synoptic-scale wave train structures exist upstream of the incipient blocking. In addition, the large-scale low/high eddy-forcing pattern upstream of the incipient blocking is an essential precondition for the onset of dipole blocking.
%K nonlinear optimization method
%K dipole blocking
%K pre-condition
%K eddy-forcing<br>非线性优化
%K 偶极堵塞
%K 旋转力
%K 地转风正压
%K 大气循环
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=5434AFBF6CB6E7E8D67733B541F211C7&aid=65D5669EE17D4ABE0DFCE95ADDD42036&yid=2DD7160C83D0ACED&vid=BC12EA701C895178&iid=38B194292C032A66&sid=A53D7AA35F9929AF&eid=3081401A9FAB9CE2&journal_id=0256-1530&journal_name=大气科学进展&referenced_num=2&reference_num=30