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时间:2020-05-03
《广西强天气分布特征及物理量诊断分析-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、网络优先数字出版时间:2014?7?22网络优先数字出版地址:http://www.cnki.net/kcms/doi/10.13657/j.cnki.gxkxyxb.20140722.001.html广西科学院学报2014,30(3):190~195JournalofGuangxiAcademyofSciencesVol.30,No.3August2014广西强天气分布特征及物理量诊断分析犃狀犪犾狔狊犻狊狅狀犆犺犪狉犪犮狋犲狉犻狊狋犻犮狊狅犳犛狆犪狋犻狅?狋犲犿狆狅狉犪犾犇犻狊狋狉犻犫狌狋犻狅狀犪狀犱犘犺狔狊犻犮犪犾犘犪狉犪犿犲狋犲狉狊狅犳犛犲狏犲狉犲犠犲犪狋犺犲狉犻狀犌
2、狌犪狀犵狓犻赵金彪,黄荣成,梁维亮ZHAOJin?biao,HUANGRong?cheng,LIANGWei?liang(广西气象台,广西南宁530022)(GuangxiMeteorologicalObservatory,Nanning,Guangxi,530022,China)摘要:【目的】分析研究广西强天气的时空分布特点和变化特征,在天气形势分型的基础上统计提供强天气发生的物理量诊断阈值。【方法】采用长时间序列、大批量样本进行分类统计和合成分析方法。【结果】雷暴南部多,北部少,其中桂东南和沿海地区是雷暴的高发区;冰雹主要出现在北部,桂南降雹少;广西东部和沿海地区为大风频发
3、区;历年龙卷风天气发生次数不多,且集中在涠州岛及沿海地区;强降水呈南北两个高频带。雷暴、降雹和强降水的月变化都具有“单峰型”特征,大风月分布具有“双峰型”特征。强降水主要出现在夜间至次日8∶00,大风、雷暴和冰雹天气则主要出现在午后至傍晚。【结论】广西强天气具有明显的地域分布特征,不同地域及不同天气系统影响下的温度层结和不稳定能量等特征物理量都有较大差异。关键词:强天气分布特征分型物理量中图分类号:P445文献标识码:A文章编号:10027378(2014)03019006犃犫狊狋狉犪犮狋:【犗犫犼犲犮狋犻狏犲】Thecharacteristicsofspatio?tem
4、poraldistributionofsevereweatherwereanalyzed.BaseonSynopticclassification,thethresholdvalueofphysicalparametersforoccurrenceofsevereweatheraredetermined.【犕犲狋犺狅犱狊】Statisticalmethodandcompositeanalyzingwereusedinthispaper.【犚犲狊狌犾狋狊】Thunderstormoccursmoreinsouththanthatinnorth.Thesoutheastandco
5、astalareasarethefrequentthunderareas.Hailoccursmoreinsouththanthatinnorth.Theeasternandcoastalareasarethefrequentgaleareas.Tornadoweatherisrareinhistory,andmainlyoccurredneartheWeizhouIslandandcoastalareas.Theheavyrainmainlyoccurredinsouthernandnorthernareas.Themonthlyvariationsofthunderstor
6、ms,hailandstrongrainallshow"single?peak"pattern,butthevariationsofgaleis"double?peak".Theheavyrainmainlyhappenedbetweennighttimeto8am.Thegale,thunderstormsandhailprimarilyoccurredbetweenafternoontotowardevening.【犆狅狀犮犾狌狊犻狅狀】ThesevereweatherinGuangxihasobviouscharacteristicofregionaldistribut
7、ionandthephysicalparameters,suchastemperaturestratificationandinstabilityenergy,showdifferenceindifferentdistrictandweathersystem.犓犲狔狑狅狉犱狊:severeweather,characteristicsofspatio?temporaldistribution,classification,physicalparameters【研究意义】广西地处低纬度,丘陵
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