資源描述：
《甘南高原短時(shí)強(qiáng)降水潛勢(shì)預(yù)報(bào)研究和雷達(dá)回波分析》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、甘南高原短時(shí)強(qiáng)降水潛勢(shì)預(yù)報(bào)研究和雷達(dá)回波分析 摘要利用甘南州8個(gè)國(guó)家氣象觀測(cè)站和146個(gè)鄉(xiāng)鎮(zhèn)區(qū)域自動(dòng)氣象站2011―2012年5―9月降水觀測(cè)資料，風(fēng)云2E紅外云圖資料和合作、武都高空站高空觀測(cè)資料，對(duì)甘南高原短時(shí)強(qiáng)降水天氣的特征進(jìn)行分析，建立了甘南州短時(shí)強(qiáng)降水過程的天氣尺度和中尺度概念模型和甘南州分縣短時(shí)強(qiáng)降水潛勢(shì)預(yù)報(bào)方程。同時(shí)利用2013―2014年甘南新一代天氣雷達(dá)資料對(duì)甘南高原短時(shí)強(qiáng)降水多普勒雷達(dá)回波特征進(jìn)行統(tǒng)計(jì)分析。結(jié)果表明：5―9月甘南州各縣市均可發(fā)生短時(shí)強(qiáng)降水，8月是短時(shí)強(qiáng)降水發(fā)生頻次最高的月份，5月和7月次
2、之，6月和9月相對(duì)較少。按照環(huán)流形勢(shì)甘南高原短時(shí)強(qiáng)降水過程可以分為高原低槽切變型、槽后西北氣流型和高壓內(nèi)部型3種類型。甘南短時(shí)強(qiáng)降水云頂亮溫值在8月達(dá)到最低。甘南短時(shí)強(qiáng)降水大部分個(gè)例回波強(qiáng)度大于20dbz，回波頂高度在3km以上，垂直液態(tài)含水量在5kg/m2，77%的短時(shí)強(qiáng)降水速度場(chǎng)有明顯的輻合和中氣旋?！ ￡P(guān)鍵詞短時(shí)強(qiáng)降水；潛勢(shì)預(yù)報(bào)；雷達(dá)回波；甘南高原 中圖分類號(hào)P456文獻(xiàn)標(biāo)識(shí)碼A文章編號(hào)1007-5739（2016）14-0197-04 PotentialForecastResearchandRadarEchoAn
3、alysisofShort-timeStrongRainfallinGannanPlateau JIZhe-junANHua-yinHETaoCHENYangZHAOHui-zhenLUOWang-jun ?。℅annanTibetanAutonomousPrefectureMeteorologicalBureau9ofGansuProvince，HezuoGansu747000） AbstractBasedontheobservationraindataof8nationalstationsand146regional
4、automaticmeteorologicalstationsfromMaytoSeptemberin2011―2012andIRimagedatabyFY-2Eandupper-airobservationdatainWuduStation，thecharacteristicsoftheshort-timestrongrainfallwasanalyzed.Theconceptualmodelofbothsynopticscaleandmeso-scalerainfallwasestablished，therespecti
5、vepotentialforecastingequationsoftheshort-timestrongrainfallwasbuildcorrespondingtoeachcountyinGannan.TheStatisticandAnalysisofDopplerradarechobynewweatherradaratGannanplateauform2013to2014weremadeatthesametime.Theresultsshowedthattheshort-timestrongrainfalloccursi
6、nallcountiesofGannanfromMaytoSeptemberandthehighestfrequencyoftheshort-timestrongrainfalloccurrencewasinOctober，andfollowedbyMayandJuly，andtheleastinJuneandSeptember.Accordingtothelargescalecirculationsituation，theprocessesmodelsoftheshort-timestrongrainfallinGanna
7、nplateaucouldbeclassifiedthreepatterns：pressuretroughshearontheQinghai-XizangPlateau，northwesterlyairflowafterthetroughandhigh-pressureinternalfield.TheTBBvalueofcloudinwhichtheshort-timestrongrainfalltookplacehitbottominAugust.Theechointensityofthemostcaseswasgrea
8、terthan20dbz，thetopofthe9echowashigherthan3kmandtheverticalliquidwatercontentwasabout5kg/m2andthereexistedapparentconvergenceandmesocycloneinvelo
