全球变暖英文课件.ppt

《全球变暖英文课件.ppt》由会员分享，可在线阅读，更多相关《全球变暖英文课件.ppt（19页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、GlobalWarming11234BackgroundReasonProblemSolution目录CONTENT2 Theclimatehasbeengettingsteadilywarmerandwarmerinrecentyears.Background 13TheaverageglobaltemperaturerisessignificantlyafterenteringtheeightiesGlobalwarmingiscoming!4 Therearemanyreasonsoftheglobalwarming,butitmainlycausedbyhumanactivitiesR

2、eason25Initialcausesoftemperaturechanges3 34 42 21 1AerosolsandsootGreenhousegasesVariationsinEarthsorbitSolaractivity6Fossilfuelburningland-usechangePopulationgrowth1 1GreenhousegasesCO27In addition to their direct effect by scattering and absorbing solar radiation,aerosols have indirect effects on

3、 the Earths radiation budget.2 2Aerosolsandsoot83 3SolaractivityThesunactivitiescausevolcaniceruption,andproducealargenumberofash94 4VariationsinEarthsorbitVariationsinorbitalcyclesmayinitiateanewglacialperiodinthefuture,thoughthetimingofthisdependsongreenhousegasconcentrationsaswellastheorbitalforc

4、ing.10 GlobalwarmingcausesallsortsofproblemsProblem311ExtremeweatherSealevelriseLong-termeffectsEcologicalsystems1 12 23 34 412ExtremeweatherProjectionssuggestaprobableincreaseinthefrequencyandseverityofsomeextremeweatherevents,suchasheatwaves，Elnino（厄尔尼诺）（厄尔尼诺）,drought,floods,thunderstorms,hail（冰（冰

5、雹）雹）,storm,theheatandduststorms13Sea LevelRise19thcenturyriseattherateof0.10to0.15peronehundredmetersIce,islands,citydisappearBringdisastertothecoastalareas14Terrestrial（陆地）ecosystemsthreatencoralreefs,fisheries,protectedspecies,andothernaturalresourcesofvaluetosocietyEffecttheflightofthemigratorybi

6、rdsaffectparticularecosystemsreduceddiversityofecosystemsoceanecosystem123EcologicalsystemsEcologicalsystemsEcologicalsystemsEcologicalsystemsAir15effectsLong-termAbruptclimatechangearesponsefromtheEarthscrusttherapidreleaseofmethaneandcarbondioxidefrompermafrostinjuryandlossoflifealargerisktoglobal

7、andregionalfoodsecurityEconomicandInfrastructureloss16 LowcarbonlifeSolution 417MitigationAdaptationClimateengineeringMitigationofclimatereducegreenhousegasemissions,orenhancethecapacityofcarbonsinkstoabsorbGHGsfromtheatmosphereLocaladaptationeffortsEnhancingadaptivecapacityAgriculturalproductionMorespendingonirrigationWeathercontrolDammingglaciallakesGeoengineeringMigrationInsurancesolarradiationmanagementandcarbondioxideremoval.18谢谢大家观看Thanks For WatchingLOGO19