%0 Journal Article
%T Diagnosis on Energy Budget and Moisture Supply of Matsa after Landfall<br>麦莎台风登陆后能量过程与水汽供应的诊断研究
%A KUNG Hiusuet
%A ZHAO Si-Xiong
%A <br>龚晓雪
%A 赵思雄
%J 气候与环境研究
%D 2007
%I 
%X A diagnostic study has been conducted on the sustaining mechanism of Typhoon Matsa(2005) which traveled northwards after landfall in Zhejiang Province with a Strong Tropical Storm intensity.The Ertel Potential Vorticity(EPV) analysis indicates that a small positive EPV anomaly at the bottom of the approaching midlatitude trough was an important source of vorticity for the modest re-intensification of Matsa,the main positive EPV area merged with Matsa after 9 August,2005.The kinetic budget anaysis shows that the kinetic energy(KE hereafter) generated by non-divergent wind component was prior to the intensification of Matsa,divergent wind component was the main kinetic energy source in the low-level,and the cumulus(sub-grid scale system) convection is another mechanism of upward kinetic energy transportation other than large scale ascending.The difference of KE transported by non-divergent wind between Matsa and Agnes(1972),which experienced strong re-intensification,may be an important reason why Matsa did not reintensify greatly as Agnes.Traveling on land,there are two moisture channels providing abundant water vapor for the maintenance of Matsa.
%K landfall tropical cyclone
%K sustaining mechanism
%K PV analysis
%K kinetic energy budget<br>热带气旋
%K 维持机制
%K 位涡分析
%K 动能收支
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=484C10BAB5333C14751916EACFF8295F&aid=15F3ECF51A3BF5B1&yid=A732AF04DDA03BB3&vid=59906B3B2830C2C5&iid=38B194292C032A66&sid=B40AD8FE6FA88DE9&eid=30F3EEEA29E34EE7&journal_id=1006-9585&journal_name=气候与环境研究&referenced_num=2&reference_num=22