基于TRMM LIS觀測的亞洲閃電活動分析.pdf

1、中國科學技術大學碩士學位論文基于TRMMIIS觀測的亞洲閃電活動分析作者姓名：導師：專業(yè)：系別：完成時間：曹衛(wèi)衛(wèi)傅云飛教授大氣物理與大氣環(huán)境地球與空間科學學院2008年lO月5日AbstractAbstractThispaperfocusesonthestudyoftheAsiantemporalandspatialclimatologicaldistributionoflightningactivitiesthroughdataobs

2、ervedbyTRMMsatellite—bomeLISRadianceofperflashhasbeendefinedastheindexoflightningintensitythen，researchhasbeendoneonthetemporalandspatialclimatologicaldistributionlightningintensityandthediffierecebetweenthemtwofurmore，w

3、iththeabnormalclimatebackgroundof1997—1998ElNine，thestudyofthecorrelationoflightningactivitiesandthemeteorologicelementshasbeendoneThefollowingconclusionshavebeenmadeaftersummarizingthetechniquedevelopmentoflightningdete

4、ction，characteristicsofclimatologicaldistributionforlightning，andtheirrelationshipwithmeteorologicelements1AsianflashamountofthelandislargerthanthatoftheoceanFlashesprevailinsummer，andthepeaktimeintervalistheafternoonThe

5、characteristicsofclimatologicaldistributionoflightningparametersdefinedbyLISaresimilarwiththeflashamountdistribution，andthecorrelativityisover80％(inspectedby95％confidence)2ThedistributioncharacteristicsofAsianlightningin

6、tensityisdifferentfromtheflashdistributionThelightningintensityoftheoceanislargerthanthatofthelandandincreases、柝ththedistancefromthecoastThelightningintensityreachesthepeakinautumnwinter，andthe8：00—10：00amistheintervalwh

7、enlightningisthemostintensive3LightningactivitiesoftypicalzonesofAsiaisregionallydifferent，andtheyarecloselyrelatedtotheirgeographiclocationsTotally，thelightningradiancefordifferentareaischaracterizedbylogarithmicnormald

8、istribution，andisnotvariablewiththeseason4Duringthe19971998ElNineevent，thecorrelativityofconvectiveprecipitationandconvectivestormheightexceeds83％(inspectedbyconfidence95％)5Duringthe19971998ElNineevent，thechangestateofcl

9、oud、icecontentwellcorrespondstothechangestateoflightningovertheseaHowevertherelativityiSsomebadResultindicatesthatthechangeofcloud、icecontentCannotreflectthechangeoflightningdirectlyKeywords：LIS，flash，lightningintensity，