%0 Journal Article
%T theory on the funnel structure of tornado<br>龙卷风的漏斗结构理论
%A LIU Shi-Kuo FU Zun-Tao LIU Shi-Da XU Huan-Bin XIN Guo-Jun LIANG Fu-Ming School of Physics
%A Laboratory for Severe Storm
%A Flood Disaster
%A Peking University
%A Beijing
%A China Atmospheric Sciences Institute of the Headquarters of the Central Staff
%A Beijing
%A China
%A <br>刘式适
%A 付遵涛
%A 刘式达
%A 许焕斌
%A 辛国君
%A 梁福明
%J 地球物理学报
%D 2004
%I 
%X Tornado is a small-scale system which as the maximal horizontal and vertical velocities in the atmosphere. From the governing equations satisfying the balance between pressure gradient force, inertial centrifugal force and viscous force, the three-dimensional velocities of tornado are obtained, and then its funnel structure is depictured theoretically. It shows that the funnel structure consists of vertex flow and jet flow. The vortex flow is resulted from inertial centrifugal force and the jet flow is from strong convection by the horizontal convergence. At the same time, it indicated that tornado is formed under the exceedingly unstable atmospheric stratification conditions.
%K Tornado
%K Funnel structure
%K Vortex flow
%K Jet flow
%K Atmospheric sciences<br>龙卷风
%K 漏斗结构
%K 涡旋流
%K 急流
%K 大气科学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=9F4EE5871D7F11B1&yid=D0E58B75BFD8E51C&vid=F4B561950EE1D31A&iid=B31275AF3241DB2D&sid=4986C0B14AED27B4&eid=BA5B7FED4FC3CDB1&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=2&reference_num=22