NCEP资料(时、日、月)下载及说明

NCEP资料〔时、日、月〕下载及说明路径：分时资料：alysis/日平均资料：月平均资料：一、分时资料地面分时资料下载路径：4-timesdaily，1948年至今，2.5×2.5类型文件名变量名单位文件大小气温4xDailyAirtemperatureatsigmalevel995degK29.2MB抬升指数4xDailySurfaceLiftedIndexdegK29.2MB最正确抬升指数4xDailyBest(4-layer)LiftedIndexdegK29.2MB上升速度4xDailyomegaatsurfacePascal/s29.2MB潜在温度4xDailypotentialtemperatureatsigmalevel995degK29.2MB大气可降水4xDailyPrecipitableWaterforentireatmospherekg/m^229.2MB本站气压4xDailyPressureatsurfacePascals29.2MB相对湿度4xDailyrelativehumidityatsigmalevel995%29.2MB海平面气压4xDailySeaLevelPressurePascals29.2MB风速〔u分量〕u4xDailyu-windatsigmalevel995m/s29.2MB风速〔v分量〕4xDailyv-windatsigmalevel995m/s29.2MB注：文件命中YYYY代表年份，下同。高空分时日资料下载：4-timesdaily，1948年至今，2.5×2.5类型文件名变量名单位文件大小气温4xDailyAirtemperaturedegK499MB位势高度499MB上升速度Pascal/s351MB相对湿度%234MB绝对湿度4xDailyspecifichumiditykg/kg234MB风速〔u分量〕m/s497MB风速〔v分量〕vm/s497MB二、日平均资料地面日资料下载路径：1948至今，2.5×2.5类型文件名变量名单位文件大小气温meanDailyAirtemperatureatsigmalevel995degK抬升指数meanDailySurfaceLiftedIndexdegK最正确抬升指数meanDailyBest(4-layer)LiftedIndexdegK上升速度meanDailyomegaatsurfacePascal/s潜在温度meanDailypotentialtemperatureatsigmalevel995degK大气可降水meanDailyPrecipitableWaterforentireatmospherekg/m^2本站气压meanDailyPressureatsurfacePascals相对湿度meanDailyrelativehumidityatsigmalevel995%海平面气压meanDailySeaLevelPressurePascals风速〔u分量〕umeanDailyu-windatsigmalevel995m/s风速〔v分量〕meanDailyv-windatsigmalevel995m/s高空日资料下载路径：1948至今，2.5×2.5类型文件名变量名单位文件大小层次气温meanDailyAirtemperaturedegK124MB17位势高度hgt.YYYY.ncmeanDailyGeopotentialheightm124MB17上升速度omega.YYYY.ncmeanDailyOmegaPascal/s87.8MB12相对湿度rhum.YYYY.ncmeanDailyrelativehumidity%58.5MB8绝对湿度shum.YYYY.ncmeanDailyspecifichumiditykg/kg58.5MB8风速〔u分量〕uwnd.YYYY.ncmeanDailyU-windm/s58.5MB17风速〔v分量〕vwnd.YYYY.ncmeanDailyVwindm/s58.5MB17注：17层〔1000、925、850、700、600、500、400、300、250、200、150、100、70、50、30、20、10hPa〕12层〔1000、925、850、700、600、500、400、300、250、200、150、100hPa〕8层〔1000、925、850、700、600、500、400、300hPa〕三、月平均资料地面月平均资料下载路径：1948至今，2.5×2.5类型文件名变量名单位文件大小气温MonthlyMeanAirTemperaturedegK30.4MB大气可降水pr_wtr.mMonthlyMeanofPrecipitableWaterContentkg/m^230.4MB本站气压MonthlyMeanofSurfacePressurePascals30.4MB相对湿度MonthlyMeanofRelativeHumidity%30.4MB海平面气压SeaLevelPressurePascals30.4MB风速〔u分量〕Monthlysurfacezonalwindm/s30.4MB风速〔v分量〕vMonthlysurfacemeridionalwindm/s30.4MB风速Monthlysurfacewindspeedm/s30.4MB高空日资料下载路径：1948至今，2.5×2.5类型文件名变量名单位其他气温MonthlyMeanAirTemperaturedegK17层位势高度上升速度相对湿度风速〔u分量〕m/s风速〔v分量〕vm/sNCEP/NCARReanalysis1:SummaryOne-LineDescription:*NCEP/NCARReanalysis1TemporalCoverage:*4-timesdaily,dailyandmonthlyvaluesfor1948/01/01topresent*Longtermmonthlymeans,derivedfromdataforyears1968-1996SpatialCoverage:*GlobalGridsLevels:*17Pressureleveland28sigmalevels.N/AUpdateSchedule:*DailyWehaveseparatedthedatadocumentationintosevensections:*Pressurelevel*Surface*SurfaceFluxes*OtherFluxes*Tropopause*DerivedData*SpectralCoefficientsUsageRestrictions:*NoneDetailedDescription:*TheNCEP/NCARReanalysis1projectisusingastate-of-the-artanalysis/forecastsystemtoperformdataassimilationusingpastdatafrom1948tothepresent.AlargesubsetofthisdataisavailablefromPSDinitsoriginal4timesdailyformatandasdailyaverages.However,thedatafrom1948-1957isalittledifferent,intheregular(non-Gaussian)griddeddata.Thatdatawasdoneat8timesdailyinthemodel,becausetheinputsavailableinthaterawereavailableat3Z,9Z,15Z,and21Z,whereasthe4xdailydatahasbeenavailableat0Z,6Z,12Z,and18Z.Theselattertimeswereforecastedandthecombinedresultforthisearlyerais8xdaily.Thelocalingestionprocesstookonlythe0Z,6Z,12Z,and18Zforecastedvalues,andthusonlythosewereusedtomakethedailytimeseriesandmonthlymeanshere.Caveats:*Pleasereadtheproblemlistbeforeusingthedata.RelatedFileNaming&StructureInformation:FileNames:*Seeindividualsections.Datain/Datasets/ncep.reanalysis/,Datasets/ncep.reanalysis.dailyavgs/,DatasetFormatandSize:*PSDstandardNetCDFmostare(packed).*Ifyouwouldlikedatasetsonamediasuchastape,youwillneedtogetthemfromanotherinstitution.NCAR(link)providessuchaservicefortheirdatasets.MissingData:*Missingdataisflaggedwithavalueof32767sor9.36e36f..Citation:*Fordatasetsource,pleasecite:Kalnayetal.,TheNCEP/NCAR40-yearreanalysisproject,Bull.Amer.Meteor.Soc.,77,437-470,1996.*Pleasenote:IfyouacquireNCEPReanalysisdataproductsfromPSD,weaskthatyouacknowledgeusinyouruseofthedata.ThismaybedonebyincludingtextsuchasNCEPReanalysisdataprovidedbytheNOAA/OAR/ESRLPSD,Boulder,orpublicationsusingthesedata.Wewouldalsoappreciatereceivingacopyoftherelevantpublications.ThiswillhelpPSDtojustifykeepingtheNCEPReanalysisdatasetfreelyavailableonlineinthefuture.Thankyou!References:*Marc