NCEP資料(時、日、月)下載及說明

NCEP資料〔時、日、月〕下載及說明路徑：分時資料：alysis/日平均資料：月平均資料：一、分時資料地面分時資料下載路徑：4-timesdaily，1948年至今，2.5×2.5類型文件名變量名單位文件大小氣溫4xDailyAirtemperatureatsigmalevel995degK29.2MB抬升指數(shù)4xDailySurfaceLiftedIndexdegK29.2MB最正確抬升指數(shù)4xDailyBest(4-layer)LiftedIndexdegK29.2MB上升速度4xDailyomegaatsurfacePascal/s29.2MB潛在溫度4xDailypotentialtemperatureatsigmalevel995degK29.2MB大氣可降水4xDailyPrecipitableWaterforentireatmospherekg/m^229.2MB本站氣壓4xDailyPressureatsurfacePascals29.2MB相對濕度4xDailyrelativehumidityatsigmalevel995%29.2MB海平面氣壓4xDailySeaLevelPressurePascals29.2MB風(fēng)速〔u分量〕u4xDailyu-windatsigmalevel995m/s29.2MB風(fēng)速〔v分量〕4xDailyv-windatsigmalevel995m/s29.2MB注：文件命中YYYY代表年份，下同。高空分時日資料下載：4-timesdaily，1948年至今，2.5×2.5類型文件名變量名單位文件大小氣溫4xDailyAirtemperaturedegK499MB位勢高度499MB上升速度Pascal/s351MB相對濕度%234MB絕對濕度4xDailyspecifichumiditykg/kg234MB風(fēng)速〔u分量〕m/s497MB風(fēng)速〔v分量〕vm/s497MB二、日平均資料地面日資料下載路徑：1948至今，2.5×2.5類型文件名變量名單位文件大小氣溫meanDailyAirtemperatureatsigmalevel995degK抬升指數(shù)meanDailySurfaceLiftedIndexdegK最正確抬升指數(shù)meanDailyBest(4-layer)LiftedIndexdegK上升速度meanDailyomegaatsurfacePascal/s潛在溫度meanDailypotentialtemperatureatsigmalevel995degK大氣可降水meanDailyPrecipitableWaterforentireatmospherekg/m^2本站氣壓meanDailyPressureatsurfacePascals相對濕度meanDailyrelativehumidityatsigmalevel995%海平面氣壓meanDailySeaLevelPressurePascals風(fēng)速〔u分量〕umeanDailyu-windatsigmalevel995m/s風(fēng)速〔v分量〕meanDailyv-windatsigmalevel995m/s高空日資料下載路徑：1948至今，2.5×2.5類型文件名變量名單位文件大小層次氣溫meanDailyAirtemperaturedegK124MB17位勢高度hgt.YYYY.ncmeanDailyGeopotentialheightm124MB17上升速度omega.YYYY.ncmeanDailyOmegaPascal/s87.8MB12相對濕度rhum.YYYY.ncmeanDailyrelativehumidity%58.5MB8絕對濕度shum.YYYY.ncmeanDailyspecifichumiditykg/kg58.5MB8風(fēng)速〔u分量〕uwnd.YYYY.ncmeanDailyU-windm/s58.5MB17風(fēng)速〔v分量〕vwnd.YYYY.ncmeanDailyVwindm/s58.5MB17注：17層〔1000、925、850、700、600、500、400、300、250、200、150、100、70、50、30、20、10hPa〕12層〔1000、925、850、700、600、500、400、300、250、200、150、100hPa〕8層〔1000、925、850、700、600、500、400、300hPa〕三、月平均資料地面月平均資料下載路徑：1948至今，2.5×2.5類型文件名變量名單位文件大小氣溫MonthlyMeanAirTemperaturedegK30.4MB大氣可降水pr_wtr.mMonthlyMeanofPrecipitableWaterContentkg/m^230.4MB本站氣壓MonthlyMeanofSurfacePressurePascals30.4MB相對濕度MonthlyMeanofRelativeHumidity%30.4MB海平面氣壓SeaLevelPressurePascals30.4MB風(fēng)速〔u分量〕Monthlysurfacezonalwindm/s30.4MB風(fēng)速〔v分量〕vMonthlysurfacemeridionalwindm/s30.4MB風(fēng)速Monthlysurfacewindspeedm/s30.4MB高空日資料下載路徑：1948至今，2.5×2.5類型文件名變量名單位其他氣溫MonthlyMeanAirTemperaturedegK17層位勢高度上升速度相對濕度風(fēng)速〔u分量〕m/s風(fēng)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