Observation of 6.5-day waves in the MLT region over Wuhan

作     者：G.Jiang~(a,b,c),J.Xiong~(a,*),W.Wan~a,B.Ning~a,L.Liu~a a Institute of Geology and Geophysics,Chinese Academy of Sciences,P.O.Box 9825,Beijing 100029,PR China b Key Laboratory of Space Weather,Center for Space Science and Applied Research,Beijing,China c Graduate School of Chinese Academy of Sciences,Beijing,PR China 

会议名称：《中国科学院地质与地球物理研究所2008学术年会》

会议日期：2009年

学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grants 40474060 and 40636032) the KIP Pilot Project(kzcx2-yw-123) of Chinese Academy of Science the National Important basic Research Project (2006CB806306) 

关 键 词：6.5-day waves Planetary waves Mesosphere and lower thermosphere Mesospheric dynamics 

摘      要：In this paper,the 6.5-day planetary waves over Wuhan(30.5°N,114.3°E) were investigated on the basis of the meteor radar measurements within 78-98 km height region during February 2002-December *** observations show that 6.5-day waves have a prominent seasonal variability and have larger amplitudes at equinoxes than at *** also found that intensive waves occur mostly between 84 and 98 km,and the zonal components of 6.5-day waves are a little larger than its meridional components on *** main periods of 6.5-day waves are near 6-7 days in spring/winter season and 5-7 days(even extend to 8 days) in autumn ***,these waves exhibit a downward progression when the amplitude is *** wave events occur basically in eastward background *** the 4-year interval, the strongest waves were found in Apri--May of 2003 and 2004.