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1、水密度在降水过程中变化都是显著的。在临近降水前一小时，各高度层的温度时急剧上升，与大气可降水量有很好的响应，水汽密度和液态水密度则在6000m以下的高度范围内急剧增加。在降水开始后的一个小时，它们都会同时下降，若降水时间持续较长，则会发生多次增减的显著变化，在降水结束后一个小时迅速减小，恢复稳定。这些变化与降水有很好的对应关系，对降水的发生有很好的指示作用。关键词:伊宁;水汽含量;地基微波辐射计;温度;液态水密度II万方数据AbstractTheground-basedmicrowaveradiometeri
2、sanewtypeofmeteorologicalobservationinstrument,whichisappliedinremotesensingtechnology,itcancontinuouslyobservetheverticalstructreoftemperature,relactivehumidityandwatervaporcontent.Resercherscanobtaindataofhighspatialangtemporalresolutionandmakeupfortheshr
3、tcomingsofconventionalsoungingdata.Italsobecomesanewmethodforstudyofdetectingwatervapor.Thewatervaporcontentisanimportantmeteorologicalparameter,whichitisalsooneofimportantissuesinthemeteorologyandclimatologyhasbeenconcerned.Theamountofwatervapor,evolutiona
4、ndtransfercharacteristicsisoneofthemainfactorscausingprecipitationofXinjiang.Theground-basedmicrowaveradiometercanobservethevariationwatervaporin24consecutivehoursandoutputveryprecisedataofprecipitation.Itprovidesreliabletechnicalsupportmeansforfineweatherf
5、orcastandnowcasting.Inthispaper,weselectedthemicrowaveradiometerobserveddataof2012Marchto2013FebruaryinYiningandthesameperiodradiosondedata,thananalysisthecorrelationofdatadetectedbythetwodevices,anddiscussethereasonofdifferenceofthedataaftercomparingthetwo
6、groupsofdata.Wefocusonthestudyofveriticaldistributionofwatervaporcontentandliquidwatercontentdetectedbymicrowaveradiometerandanalyzedthechangeruleofthem,thanfindoutthechangesthresholdintheprocessofrainfall.Throughtheexperimentsandanalysis,theconclusionsarea
7、sfollows:1.Thetwodeviceshadgoodcorrelationintemperatureandvaporcontent,buttherelativehumiditywaspoorcorrelation.Inthewholeyear,thecorrelationcoefficientoftemperatureis0.99,thecorrelationcoefficientofwatervaporcontentis0.868,thecorrelationcoefficientofrelati
8、vehumidityis0.616,bothofwhichsuccessfullypassedthesignificanceleveltestwithcredibledegreeof0.01.Withthecomparisonofprofile,wefoundthatthetemperatureofmicrowaveradiometerislowerthanradiosonde’sabove1700
