DetectionofAnthropogenicCO2EmissionSignatureswithTanSatCO2andwithCopernicusSentinel-5Precursor(S5P)NO2Measurements:FirstResultsDongxuYANG*1,JanneHAKKARAINEN2,YiLIU1,IolandaIALONGO2,ZhaonanCAI1,andJohannaTAMMINEN21InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029,China2FinnishMeteorologicalInstitute,HelsinkiFI-00560,Finland(Received29August2022;revised8October2022;accepted10October2022)ABSTRACTChina’sfirstcarbondioxide(CO2)measurementsatellitemission,TanSat,waslaunchedinDecember2016.ThispaperintroducesthefirstattempttodetectanthropogenicCO2emissionsignaturesusingCO2observationsfromTanSatandNO2measurementsfromtheTROPOsphericMonitoringInstrument(TROPOMI)onboardtheCopernicusSentinel-5Precursor(S5P)satellite.WefocusouranalysisontwoselectedcasesinTangshan,ChinaandTokyo,Japan.WefoundthattheTanSatXCO2measurementshavethecapabilitytocapturetheanthropogenicvariationsintheplumeandhavespatialpatternssimilartothatoftheTROPOMINO2observations.ThelinearfitbetweenTanSatXCO2andTROPOMINO2indicatestheCO2-to-NO2ratioof0.8×10–16ppm(moleccm–2)–1inTangshanand2.3×10–16ppm(moleccm–2)–1inTokyo.OurresultsalignwiththeCO2-to-NOxemissionratiosobtainedfromtheEDGARv6emissioninventory.Keywords:TanSat,CO2,Remotesensing,citycarbonemission,climatechangeCitation:Yang,D.X.,J.Hakkarainen,Y.Liu,I.Ialongo,Z.N.Cai,andJ.Tamminen,2023:DetectionofanthropogenicCO2emissionsignatureswithTanSatCO2andwithCopernicusSentinel-5Precursor(S5P)NO2measurements:Firstresults.Adv.Atmos.Sci.,40(1),1−5,https://doi.org/10.1007/s00376-022-2237-5.1.IntroductionByabsorbinginfraredradiation,greenhousegasestrapheatintheEarth’satmosphere,whichwouldotherwiseescapeintospace,andgreenhousegasconcentrationsintheatmospherehaveincreasedsincetheonsetoftheindustrialrevolution.Inthe2015UnitedNationsClimateChangeConferenceheldinParis,participantsagreedtoreducegreenhousegasemissionstopreventanaverageglobalsurfacetemperatureincreaseofmorethan1.5°C.Hence,mitigatingorslowingdownglobalwarmingrepresentsachallengefacedb...
