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1、057726619/2008/66(2)20251261ActaMeteorologicaSinica气象学报X波段双线偏振雷达不同衰减订正方法对比X及其对降水估测影响研究1,2134胡志群刘黎平楚荣忠金荣花1,2134HUZhiqunLIULipingCHURongzhongJINRonghua1.中国气象科学研究院,灾害天气国家重点实验室,北京,1000812.南京信息工程大学,南京,2100443.中国科学院寒区旱区环境工程研究所,兰州,7300004.国家气象中心,北京,1000811.StateKeyLaboratoryofSevereWeathe
2、r,ChineseAcademyofMeteorologicalSciences,Beijing100081,China2.NanjingUniversityofInformationScienceandTechnology,Nanjing210044,China3.ColdandAridRegionsEnvironmentalandEngineeringResearchInstitute,ChineseAcademyofSciences,Lanzhou730000,China4.NationalMeteorologicalCenter,Beijing100
3、081,China2006208215收稿,2006212218改回.HuZhiqun,LiuLiping,ChuRongzhong,JinRonghua.2008.ComparisonofdifferentattenuationcorrectionmethodsandtheireffectsonestimatedrainfallusingX2bandduallinearpolarimetricradar.ActaMeteorologicaSinica,66(2):251-261AbstractExceptitssmallerantenna,mobileco
4、nvenienceandlowcost,X2bandradarhasahigherresolutionthantheS2band’s,andC2band’s,andthereforecanthereforedetectmoresubtlemicrophysicalprocessesinformationofclouds,raindrop,hailandhydrome2teoretc.Asaneffectivecomplementarityofnewgenerationweatherradarnetwork,itcanbewidelyappliedtothem
5、onitoringandwarningofdisastrousweathersuchasheavyrainandhails,theoperationsguidanceandeffectevaluationofweathermodification,andthemanagementsofreservoir,urbanareaandaviationetc.,therefore,ithasahugepotentialintheremotesensingofcloudsandpre2cipitationandinnowcasting.Comparedtoordina
6、ryDopplerweatherradars,dualpolarimetricradarhaveaverydistinctadvantageinthequantitativeestimationofprecipitation,however,theradarsignalattenuationisanimportantshortcomingwhichhampersthewideapplicationofX2Bandradar,especiallyinprecipitationestimate.Variouskindsofsignalattenuationcor
7、rectionmethodsforX2bandduallinearpolarimetricradarareanalyzed,thespecificdifferentialphaseshiftKDPisconsideredasaneffectiveapproachonat2tenuationcorrection.However,thevaluesofKDPforlightrainaretoosmall,whichresultsininstablequalityandlargererror,there2fore,reflectivityandspecificdi
8、fferentialphaseshiftarecom
