冷云催化劑及其在層狀云催化增雨中的應用研究.pdf

1、南京氣象學院碩士學位論文冷云催化劑及其在層狀云催化增雨中的應用研究姓名：李艷偉申請學位級別：碩士專業(yè)：大氣物理學與大氣環(huán)境指導教師：鄭國光杜秉玉20040501AbstractAccordingtotheworkofimprovingseedingagentsinthe‘‘ResearchofPrecipitationEnhancementTechnologyandItsDemonstration”somekindsofnewseedi

2、ngagentsareintroducedThenewcatalystssuchas“37”shell，AgIsmokebar，liquidC02areimprovedandappliedinpresentworkInthispaper，experimentalequipmentsandprocessaregivenindetailTheresultsofexperimentsshowthatnucleationratesofnewse

3、edingagentshavebeenimprovedInordertoverifytheeffectsofapplicationinweathermodification，somenumericalsimulationofstratusinHenanProvincewerecarriedoutThemodelusedinthispaperisathree—dimensionmodeloflAPThenucleationratesofd

4、ifferentseedingagentsareusedastheinitialconditionsinthemodel，andatthesarnetimecloudfeaturesandmodificationmethodsarepaidmoreattentioninthemodelWhensimuIatingprocessofliquidC02，influenceofthermodynamicstocloudsisfullytake

5、nintoaccountedDynamicalandmicrophysicalprocessesofseededandunseededcloudswerecalculatedbysimulationDistinctchangingfeaturesofcloudsafterseedingwereanalyzed，thensomesignificantconclusionsaregotWiththesuitableseedingmethod

6、sinpropertimeandregioninclouds，precipitationisenhanced。Andspacialdistributionischanged，forexample，positionofrainfallcenterandintensitiesweresignificantlychangedCloudstllmthickerandradarechoesturnstrongerThecloudwaterinth

7、econcernedcloudswasconsumedquicklyafterseedingIce—phaseparticlesappearearlierandtheirconcentrationsandcontentsincreasedMicrophysicalprocessesturnmoreactiveThemainmechanismofenhancingprecipitationisthatmuchicenucleiturnin

8、toicesandthensnow；graupelareformedmorebymicrophysicalprocessesThemeltingofgraupelmakesprecipitationmorethanthatofunseededcloudsApplicationresultsofnewkindsofseedingagentsCanprovidesomebasesforweathermodj右catiOllKeywords：