CHARACTERISTICS OF UT/LS CARBON MONOXIDE INTRASEASONAL OSCILLATIONS AND THEIR IMPACT FACTORS OVER THE TIBETAN PLATEAU AND ITS ADJACENT AREAS IN SUMMER-中国期刊网

摘要 Thestudypresentedhereininvestigatedthemaincharacteristicsofcarbonmonoxideintraseasonalvariabilityandevaluateditspossibleimpactfactorsusingtheuppertroposphereandlowerstratosphere(UT/LS)AuraMicrowaveLimbSounder(MLS)observationsoverTibetanPlateauanditsadjacentareasinsummer(JunetoAugust)of2005and2006.ObservationsshowapersistentconstituentextremeextendingupintotheUT/LSthroughoutsummer,aswellasatemporallyreversedphasevariationbetweenthecarbonmonoxideandozoneinUT/LS.Theintraseasonaloscillations(ISOs)ofcarbonmonoxideduringsummerareinvestigatedbyusingmethodsofwaveletandbandpassfilteranalysis.ItisfoundthatISOsovertheTibetanPlateauhaveperiodsof10to20daysand30to60days.Theformermainlyappearedinuppertropospherewhilethelatterinlowerstratosphere.FurtheranalysisshowsthatthesetwoperiodsofISOsinUT/LSaremainlyinphasetotheactivitiesofconvectionoverthesouthoftheplateauandthevariationofSouthAsiaHigh,respectively.TheabovetwofactorsandtheirdynamicalcouplingmayberesponsibleforthetracerISOsatdifferentlevels.

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CHARACTERISTICS OF UT/LS CARBON MONOXIDE INTRASEASONAL OSCILLATIONS AND THEIR IMPACT FACTORS OVER THE TIBETAN PLATEAU AND ITS ADJACENT AREAS IN SUMMER

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CHARACTERISTICS OF UT/LS CARBON MONOXIDE INTRASEASONAL OSCILLATIONS AND THEIR IMPACT FACTORS OVER THE TIBETAN PLATEAU AND ITS ADJACENT AREAS IN SUMMER

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