全球变暖英文课件.ppt
GlobalWarming11234BackgroundReasonProblemSolution目录CONTENT2 Theclimatehasbeengettingsteadilywarmerandwarmerinrecentyears.Background 13TheaverageglobaltemperaturerisessignificantlyafterenteringtheeightiesGlobalwarmingiscoming!4 Therearemanyreasonsoftheglobalwarming,butitmainlycausedbyhumanactivitiesReason25Initialcausesoftemperaturechanges3 34 42 21 1AerosolsandsootGreenhousegasesVariationsinEarthsorbitSolaractivity6Fossilfuelburningland-usechangePopulationgrowth1 1GreenhousegasesCO27In addition to their direct effect by scattering and absorbing solar radiation,aerosols have indirect effects on the Earths radiation budget.2 2Aerosolsandsoot83 3SolaractivityThesunactivitiescausevolcaniceruption,andproducealargenumberofash94 4VariationsinEarthsorbitVariationsinorbitalcyclesmayinitiateanewglacialperiodinthefuture,thoughthetimingofthisdependsongreenhousegasconcentrationsaswellastheorbitalforcing.10 GlobalwarmingcausesallsortsofproblemsProblem311ExtremeweatherSealevelriseLong-termeffectsEcologicalsystems1 12 23 34 412ExtremeweatherProjectionssuggestaprobableincreaseinthefrequencyandseverityofsomeextremeweatherevents,suchasheatwaves，Elnino（厄尔尼诺）（厄尔尼诺）,drought,floods,thunderstorms,hail（冰（冰雹）雹）,storm,theheatandduststorms13Sea LevelRise19thcenturyriseattherateof0.10to0.15peronehundredmetersIce,islands,citydisappearBringdisastertothecoastalareas14Terrestrial（陆地）ecosystemsthreatencoralreefs,fisheries,protectedspecies,andothernaturalresourcesofvaluetosocietyEffecttheflightofthemigratorybirdsaffectparticularecosystemsreduceddiversityofecosystemsoceanecosystem123EcologicalsystemsEcologicalsystemsEcologicalsystemsEcologicalsystemsAir15effectsLong-termAbruptclimatechangearesponsefromtheEarthscrusttherapidreleaseofmethaneandcarbondioxidefrompermafrostinjuryandlossoflifealargerisktoglobalandregionalfoodsecurityEconomicandInfrastructureloss16 LowcarbonlifeSolution 417MitigationAdaptationClimateengineeringMitigationofclimatereducegreenhousegasemissions,orenhancethecapacityofcarbonsinkstoabsorbGHGsfromtheatmosphereLocaladaptationeffortsEnhancingadaptivecapacityAgriculturalproductionMorespendingonirrigationWeathercontrolDammingglaciallakesGeoengineeringMigrationInsurancesolarradiationmanagementandcarbondioxideremoval.18谢谢大家观看Thanks For WatchingLOGO19
