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Composite Analysisabout Ageostrophic Wind in Development of the Low-level Jet Associated with Meiyu Front

Dong Jiabin Zhejiang Meteorological Observatory,Hangzhou 310 0 2 1 Si Gongwang Department of Geography,Hangzhou University,Hangzhou 310 0 2 8  
A composite analysis of5cases has been carried out.The result identifies thatthere are subgeostrophic and supergeostrophic stages in the development of low- level jet.Subgeostrophic,which mainly shows in u- compo- nent,is in the developing stage of low- level jet.Supergeostrophic,which mainly shows in v- component,is in the mature stage of low- level jet,and it mainly shows in u- component in the decaying stage.The possible physical mechanism of the development of low- level jet is inertial oscillation of the wind field around the geostrophic wind.
【CateGory Index】: P425
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