冷云催化劑及其在層狀云催化增雨中的應(yīng)用研究.pdf

1、南京氣象學(xué)院碩士學(xué)位論文冷云催化劑及其在層狀云催化增雨中的應(yīng)用研究姓名：李艷偉申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：大氣物理學(xué)與大氣環(huán)境指導(dǎo)教師：鄭國(guó)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：