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1、南极洲沃斯托克湖的冰芯的二氧化碳历史记录(HistoricalCarbonDioxideRecordfromtheVostokIceCore,Antarctica)数据介绍：InJanuary1998,thecollaborativeice-drillingprojectbetweenRussia,theUnitedStates,andFranceattheRussianVostokstationinEastAntarcticayieldedthedeepesticecoreeverrecovered,reachingadepthof3,623m(Petitetal.1997,1999)
2、.Icecoresareuniquewiththeirentrappedairinclusionsenablingdirectrecordsofpastchangesinatmospherictrace-gascomposition.关键词：数据格式：TEXT数据详细介绍：HistoricalCarbonDioxideRecordfromtheVostokIceCoreInvestigatorsJ.-M.Barnola,D.Raynaud,C.LoriusLaboratoiredeGlaciologieetdeGéophysiquedel'Environnement,CNRS,BP96,
3、38402SaintMartind'HeresCedex,FranceN.I.BarkovArcticandAntarcticResearchInstitute,BeringaStreet38,199397,St.Petersburg,RussiaPeriodofRecord417,160-2,342yearsBPMethodsInJanuary1998,thecollaborativeice-drillingprojectbetweenRussia,theUnitedStates,andFranceattheRussianVostokstationinEastAntarcticayie
4、ldedthedeepesticecoreeverrecovered,reachingadepthof3,623m(Petitetal.1997,1999).Icecoresareuniquewiththeirentrappedairinclusionsenablingdirectrecordsofpastchangesinatmospherictrace-gascomposition.PreliminarydataindicatetheVostokice-corerecordextendsthroughfourclimatecycles,withiceslightlyolderthan
5、400kyr(Petitetal.1997,1999).Becauseairbubblesdonotcloseatthesurfaceoftheicesheetbutonlynearthefirn-icetransition(thatis,at~90mbelowthesurfaceatVostok),theairextractedfromtheiceisyoungerthanthesurroundingice(Barnolaetal.1991).UsingsemiempiricalmodelsofdensificationappliedtopastVostokclimateconditi
6、ons,Barnolaetal.(1991)reportedthattheagedifferencebetweenairandicemaybe~6000yearsduringthecoldestperiodsinsteadof~4000years,aspreviouslyassumed.Icesampleswerecutwithabandsawinacoldroom(atabout-15°C)ascloseaspossibletothecenterofthecoreinordertoavoidsurfacecontamination(Barnolaetal.1983).Gasextrac
7、tionandmeasurementswereperformedwiththe"Grenobleanalyticalsetup,"whichinvolvedcrushingtheicesample(~40g)undervacuuminastainlesssteelcontainerwithoutmeltingit,expandingthegasreleasedduringthecrushinginapre-evacuatedsamp
