全球变暖英文.ppt

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1、GlobalWarming1234BackgroundReasonProblemSolution目录CONTENTThe climate has been getting steadily warmer and warmer in recent years.Background1Theaverageglobaltemperature  risessignificantlyafterenteringtheeightiesGlobalwarmingiscoming!!!!Therearemanyreasonsoftheglobalwarming,butitmainlycausedbyhuman

2、activitiesReason2Initialcausesoftemperaturechanges3421AerosolsandsootGreenhousegasesVariationsinEarth'sorbitSolaractivityFossilfuelburningland-usechangePopulationgrowth1GreenhousegasesCO2Inadditiontotheirdirecteffectbyscatteringandabsorbingsolarradiation,aerosolshaveindirecteffectsontheEarth'sradi

3、ationbudget.2Aerosolsandsoot3SolaractivityThesun’activitiescausevolcaniceruption,andproducealargenumberofash4VariationsinEarth'sorbitVariationsinorbitalcyclesmayinitiateanewglacialperiodinthefuture,thoughthetimingofthisdependsongreenhousegasconcentrationsaswellastheorbitalforcing.Globalwarmingcaus

4、esallsortsofproblemsProblem3ExtremeweatherSealevelriseLong-termeffectsEcologicalsystems1234ExtremeweatherProjectionssuggestaprobableincreaseinthefrequencyandseverityofsomeextremeweatherevents,suchasheatwaves，Elnino（厄尔尼诺）,drought,floods,thunderstorms,hail（冰雹）,storm,theheatandduststormsSeaLevelRise1

5、9thcentury ——riseattherateof0.10to0.15peronehundredmetersIce,islands,citydisappearBringdisastertothecoastalareasTerrestrial（陆地）ecosystemsthreatencoralreefs,fisheries,protectedspecies,andothernaturalresourcesofvaluetosocietyEffecttheflightofthemigratorybirdsaffectparticularecosystemsreduceddiversit

6、yofecosystemsoceanecosystem123EcologicalsystemsAireffectsLong-termAbruptclimatechangearesponsefromtheEarth'scrusttherapidreleaseofmethaneandcarbondioxidefrompermafrostinjuryandlossoflifealargerisktoglobalandregionalfoodsecurityEconomicandInfrastructurelossLowcarbonlifeSolution4MitigationAdaptation

7、ClimateengineeringMitigationofclimatereducegreenhousegasemissions,orenhancethecapacityofcarbonsinkstoabsorbGHGsfromtheatmosphereLocaladaptationeffortsEnhancingadaptivecapacityAgriculturalproductionMorespendingoni