Theinterestinthenationallevelsoftheterrestrialcarbonsinkanditsspatialandtemporalvariabil-itywiththeclimateandCO2concentrationshasbeenincreasing.HowtheclimateandtheincreasingatmosphericCO2concentrationsinthelastcenturyaffectthecarbonstorageincontinentalChinawasin-vestigatedinthisstudybyusingtheModifiedSheffeldDynamicGlobalVegetationModel(M-SDGVM).TheestimatesoftheM-SDGVMindicatedthatduringthepast100yearsacombinationofincreasingCO2withhistoricaltemperatureandprecipitationvariabilityincontinentalChinahavecausedthetotalvege-tationcarbonstoragetoincreaseby2.04PgC,with2.07PgCgainedinthevegetationbiomassbut0.03PgClostfromtheorganicsoilcarbonmatter.TheincreasingCO2concentrationinthe20thcenturyisprimarilyresponsiblefortheincreaseofthetotalpotentialvegetationcarbon.Thesefactorialexperimentsshowthattemperaturevariabilityalonedecreasesthetotalcarbonstorageby1.36PgCandprecipitationvariabilityalonecausesalossof1.99PgC.TheeffectoftheincreasingCO2concentrationaloneincreasedthetotalcarbonstorageinthepotentialvegetationofChinaby3.22PgCoverthepast100years.Withthechangingoftheclimate,theCO2fertilizationonChina'secosystemsistheresultoftheenhancednetbiomeproduction(NBP),whichiscausedbyagreaterstimulationofthegrossprimaryproduction(GPP)thanthetotalsoil-vegetationrespiration.OurstudyalsoshowsnotableinterannualanddecadalvariationsinthenetcarbonexchangebetweentheatmosphereandterrestrialecosystemsinChinaduetothehistoricalclimatevariability.
