《地球生态系统-圈层英文版.ppt》由会员分享，可在线阅读，更多相关《地球生态系统-圈层英文版.ppt（15页珍藏版）》请在三一办公上搜索。
1、,The Earth as a System,Earths Spheres,Earth System Science(ESS),The study of the interactions between and among events and Earths spheres A relatively new science(1988),Earths Sphere,AtmosphereHydrosphereLithosphereBiosphereCryosphereAnthrosphere,Atmosphere,A gaseous sphere and it envelopes the Eart
2、h,Consists of a mixture of gases composed primarily of nitrogen,oxygen,carbon dioxide,and water vapor.,Hydrosphere,All of the water on Earth71%of the earth is covered by water and only 29%is terra firma,Lithosphere,The Earths solid surface,often called the crust of the earth.It includes continental
3、and oceanic crust as well as the various layers of the Earths interior.,Biosphere,All life on earth,including man,and all organisms.The life zone on our planet distinguishes our planet from the others in the solar system.,Cryosphere,The portion of the Earths surface where water is in a solid formSno
4、w or ice:includes glaciers,ice shelves,snow,icebergs,and arctic climatology,Anthrosphere,Man and his direct ancestors,hominids.The human population,its buildings,dams,and other constructions.,Interconnected Spheres,Spheres are closely connected Changes are often chain reactionsA change in one sphere
5、 results in changes in others-called an eventForest fire destroys plants in an areaInteractions between spheresNo plants=erosion Soil in water=increased turbidityTurbidity=impacts water plants/animals,Event Sphere,Causes&EffectsInteractionsEvent SphereSphereSphere,ESS Analysis,EventsCause-effect eve
6、ntsInteractions Natural eventsEarthquake,hurricane,forest firesHuman caused eventsOil spill,air pollution,construction,ESS Analysis,What spheres caused the event?Sphere Event What are effects of the event on the spheres?Event SpheresHow do changes in one sphere impact on other spheres?Sphere Sphere,Understanding Interactions,Global implicationsHelps people predict outcomesPreparation for natural disastersEnvironmental impacts of human activities,ESS Analysis,An Example-handoutYellowstone Forest FireGroup activity Mt St Helens eruption,1980 Hurricane Andrew,1992,
