安徽地區(qū)雷電氣候特征及伴隨閃電的強對流天氣分析.pdf

1、南京信息工程大學(xué)碩士學(xué)位論文安徽地區(qū)雷電氣候特征及伴隨閃電的強對流天氣分析姓名：蔣慧敏申請學(xué)位級別：碩士專業(yè)：大氣遙感科學(xué)與技術(shù)指導(dǎo)教師：顧松山陳鐘榮20090501南京信息工程大學(xué)碩士學(xué)位論文AbstractThisresearchisbasedonthedataofthelighminglocationsystemandtheCINRADSADopplerradarinAnhuiAccordingtoanalyzingtheIigh

2、tningprocesswidely，wecalldrawsomeconclusionsasthefollow：MostoflightninghappeninJulyandAugustLightningOccursfrequentlyabout14：00withsinglepeakthelightingintensitymostlessthan50KA，Onthemonthlybasis，theelectricalcurrentisal

3、soveryintensewithpositivelightingthanwithnegativeoneTheratioofpositivelightningtototallightningisverylittle，just154％，whichislessthanotherprovinceTwolightingactivitycenterarefoundwhicharelocatedinjiangningmaanshancaohuare

4、a，andliuanareaAlongwiththelightningdataofanhuiprovinceandradiosondedataofAnqing，thetestmakelightningpotentialforecastforanqingfindthatShowalterindexandothernineconvectionparameterCandenotatetheactivityofthelightning，thel

5、ightningfiendisforecastedwiththeindicatesmultipleregressionanalysismethodandthresholdvaluecombinationmethodTheresultthatthelattermethodexcelstheformerItisobviousthatthismethodhasbetterindicativesignificancetoforecastthel

6、ightninginAnqingThroughanalyzetheflashdistributionofdifferentphasesanddifferentechointensityitsshowthatflashmostappearedwithintherangeof30to55dBzThenumberofflashswascorrelatedbeaerwiththeareaofETgreaterorequalto9km，andth

7、efittingequationbeingET(硎∞)2737204Fcc40523384，correlationcoefficientis082Comparedwiththechangesofthestrongechoareas(=40dBZ)，thelightningactivitiesareaheadSothelightningactivitieshavepreferablydenotationforthestrongechoar