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1、地磁与空间电磁环境研究室SeasonalbehaviorofmeteorradarwindsoverWuhanGuangxinZhao1,2,3,LiboLiu1,WeixingWan1,BaiqiNing1,andJiangangXiong11DivisionofGeomagnetismandSpacePhysics,InstituteofGeologyandGeophysics,ChineseAcademyofSciences,Beijing,100029,China2WuhanInstituteofPhysicsandMathematics,CAS,Wuhan,430071,Chi
2、na3GraduateSchooloftheChineseAcademyofSciences(ReceivedMarch23,2004;RevisedNovember9,2004;AcceptedNovember10,2004)Anewlyinstalledmeteorradarhasbeeninstalledtomeasurewindsinthemesosphereandlowerthermosphere(MLT)overWuhan(114.4◦E,30.6◦N).Inthepresentstudy,adatabaseofthefirst25months(February2002–Fe
3、bruary2004)ofobservationshasbeenanalyzedtoinvestigatetheclimatologyofmeanwindsandtides.Thedailyaveragezonalwindischaracteredbyastrongshearinsolsticesandanintenseeastwardflowinsummer.Thedailyaveragemeridionalwindisnorthwardinwinterandsouthwardinotherseasons.Therearesomediscrepanciesbetweentheradar
4、meanwindsandtheHWM93modelwinds.Thesummerzonalwindsandmeridionalwindsfromthemodelareobviouslyweakerthanourobservations.TheanalysisontidesindicatesthatthediurnaltideisdominantatWuhan.Theseasonalvariabilityisobservedinboththediurnalandsemidiurnaltidalamplitudeswiththemaximumvaluesoccurringusuallynea
5、rtheequinoxes.ComparedwiththeGlobalScaleWaveModel(GSWM00),theobservedresultsgenerallyshowasmallerdiurnaltidalamplitudeandalargersemidiurnaltidalamplitude.Keywords:Meteorradar,meanwinds,tides,MLTdynamics.TheterdiurnaltideinthemesosphereandlowerthermosphereoverWuhan(30◦N,114◦E)GuangxinZhao1,2,3,Lib
6、oLiu1,BaiqiNing1,WeixingWan1,andJiangangXiong11InstituteofGeologyandGeophysics,ChineseAcademyofSciences,Beijing,100029,China2WuhanInstituteofPhysicsandMathematics,ChineseAcademyofSciences,Wuhan,China3GraduateSchooloftheChineseAcademyofSciences,China(ReceivedAugust25,2004;RevisedApril18,2005;Accep
7、tedApril18,2005)Windsmeasuredbyanall-skymeteorradarhavebeenusedtoinvestigatetheterdiurnaltideinthemesosphereandlowerthermosphere(MLT)regionoverWuhan(30.6◦N,114.4◦E).Wepresentaclimatologyoftheterdiurnaltideatlow-midlati
