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1、InternationalJournalofSustainableDevelopment&WorldEcology14(2007)511–519CarbondischargethroughmunicipalsolidwasteinHaikou,ChinaTingwenLuo,ZhiyunOuyang,XiaokeWang,WeifengLiandWeihuaXuStateKeyLabofSystemsEcology,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing,ChinaKeywor
2、ds:Municipalsolidwaste,carbondischarge,carbonmetabolism,urbancarbonflow,urbanecosystemsSUMMARYWithrapidurbandevelopment,municipalsolidwaste(MSW)hasbecomeapressingissue.Estimationofcarbondischargethroughmunicipalsolidwasteprovidesawaytoassessenvironmentalloadofsolidwastefromtheviewpointofthecarbon
3、cycle.Withfewstudiesoncarbonflowinurbanecosystems,thisresearchcontributestourbancarbonresearchandprovidesinsightsintohumanimpactsonthecarboncycle.Basedonacom-prehensivefieldworkinvestigationofatypicalChinesetouristcity–HaikouCity,HainanIsland–thecharacteristicsofMSWcarbondischargeandhumanactiviti
4、esthatinfluenceditwereanalysed.Theresultsindicatedthat,in2001,thetotalcarbondischargefrom261.9GgofMSWwas105.1GgCperyear,and174.6kgCpercapitaperannum.Carbonisdischargedintheformoffoodscraps(24%),plastics(20%),wood(17%),fabrics(14%),paper(13%),anddustandstone(12%).Iflandfillreceivedallthewaste,4.7%
5、ofMSWcarbonwouldbetransformedintomethane,withavalueof4.9GgC.Between1991and1999,Haikou’spercapitaMSWcarbondischargeincreasedby59.9%,andtotalMSWcarbondischargeincreasedby124.9%.MSWcarbondischargeinHaikouissignificantlyaffectedbythegrowthofresidentialexpenditureandurbanisation.Localcharacteristicsof
6、tourismalsoinfluenceHaikou’sMSWcarbondischarge,notonlyintermsofitsyearlyvariation,butalsoitsmonthlyvariation.IntegratingdataoncarbondischargewithcarbonDownloadedby[TongjiUniversity]at19:4414May2012consumptionwillprovideasystematicviewofthecarbonmetabolisminurbaneco-systems,andfurtherinsightsintot
7、hegenerationofurbanenvironmentalpollution.INTRODUCTIONForthepast150years,urbanisationhasprovedtoprosperityofcitiesdriveschangesintheeconomy,beamajorglobaltrendwithsignificantimpactsoneducation,employment,criminaljustic