%0 Journal Article
%T The Cold-Frontal Circulation in the Upper-Level Westerly Jet and Low-Level Southerly Jet<br>高空西风急流和低空南风急流中的冷锋环流
%A Lu Keli
%A Qian Taotao
%A <br>吕克利
%A 钱滔滔
%J 大气科学
%D 1996
%I 
%X The influence of different background currents on the circulation of a dry cold front is investigated by using a primitive equation model. The calculations show that the upper-level westerly flow plays a main role in the development and enhancement of the cross-frontal ageostrophic circulation and vertical motion in the frontal zone. The cross-frontal circulation also depends on the low-level southerly flow. However, its effect is much weaker than the westerly flow. The westerly current with strong vertically shear is advantageous to generate a stronger cross-frontal circulation and upward motion in the frontal zone. In addition, the cross-frontal circulation is related with the regions of small Richardson number.
%K upper-level jet low-level jet cold front<br>高空急流
%K 低空急流
%K 冷锋环流
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=46874A5A102033D774D00D819E91CD68&aid=A616D3E3587054871CA50E3FE8C4C10C&yid=8A15F8B0AA0E5323&vid=A04140E723CB732E&iid=B31275AF3241DB2D&sid=DC06EBDBAF4E06D3&eid=DC2727B6AC017B3F&journal_id=1006-9895&journal_name=大气科学&referenced_num=4&reference_num=1