3地球大气的演化及大气层的垂....ppt

1、schoolofchemicalandbiologicalengineering、专业人员公关、chapter2atmosphericchemistryoftheenvironment、第1部分发展第2部分atmosphericverticalstructure， 第1部分evolvementofatmosphereintheglobe ourearthissurroundedbyheavyatmosphere.therareairexistsbeyond 1000 kmfromearthsurface.b ncennt from earth surface .chapter2atmosphe

2、ricchemistryoftheenvironment，theoreticatmosphericcomponentisdifferentfrompractical how 、Eight Planet、nowwecansummarizetheatmosphericevolutionprocessasfollow.(1)灯光gas、水晶和健康。 escapesfromatmospheregradually.carbondioxidecontentdecreasesgreatlyandoxygencontentincreasesevidently.nitrogen contentant ally

3、(2) reductiveatmosphereoforiginalairbecomegraduallyoxidativeatmosphereofmodernair.(3) biosphereformationplayanimportantroleins 何龙道何孙主义？ 何龙威尔是孙主义者？ howdoestheatmosphereevolveintheearth？ isitpossibletofindhumanbeinginotherplanet？ Video 4 cosmos and man 010115、第2部分atmosphericverticalstructure、外围设备sshow

4、sthatatmospherictemperature， chemiccture andothercharacteristichavedifferentchangelaws.so是theatmosphereisdividedintofivepartsaccordingtotemperatureverti 1. Troposphere，nearequatorthethicknessoftroposphereisabout 1618 km .中间版1012 km， two poles 89 km.remarkablecharacteristicoftroposphereisasfollow .(1

5、) atmospherictemperaturedecreaseswiththeincreaseofthealtitude.atmospherictemperaturewilldecrease0.6whilealtitudeincrease (2) I airdensityisbiggerandcontentofwatervaporisabundant.somanyweatherphenomenatakeplaceinthistropospppy2. stratosphere， theaerospherebetweenthetopoftroposphereandaltitudeof 50 km

6、iscalledstratosphere.stratosphericcharacteristicisasfollow .(1) Air does level movement mainly，noconvectionmovement.(2) airisthinnerthanintroposphere.watervaporanddusts (3) anozonosphereexistsbetween 15 k mand 35 kmofaltitude.(4) thetemperatureofstratosphereincreaseswiththeincreaseofallease3. meso sphere theaerospherebetweenthetopofstratosphereandaltitudeof 80 kmiscalledmesosphere.mesospherictemperaturedecreaseswiththeincrease lt I topofmesosphereisabout-92 .4. Thermosphere、theaerospherebetweenthetopofmesosphereandaltitudeof 500 er oxygenabsorbstro