ClimateChangeResearchLetters气候变化研究快报,2023,12(4),722-729PublishedOnlineJuly2023inHans.https://www.hanspub.org/journal/ccrlhttps://doi.org/10.12677/ccrl.2023.124075文章引用:程理君,方韵.2022年长沙一次低温雨雪冰冻天气成因及预报偏差分析[J].气候变化研究快报,2023,12(4):722-729.DOI:10.12677/ccrl.2023.1240752022年长沙一次低温雨雪冰冻天气成因及预报偏差分析程理君,方韵*长沙市气象局,湖南长沙收稿日期:2023年6月16日;录用日期:2023年7月14日;发布日期:2023年7月21日摘要利用高空和地面观测资料、数值模式资料以及雷达资料,分析了长沙地区2022年2月6~9日低温雨雪冰冻天气过程的成因及预报偏差,得出以下结论:1)整个降雪过程分为两个阶段,雨雪区域均自西向东逐步推进。2)第一阶段表现为低槽东移型,东移过程中不断引导冷空气南下;第二阶段表现为小槽发展型,受强冷平流影响小槽发展。3)两个降雪阶段中,低空急流都是水汽条件主要提供者,并且整层温度低于0℃是雨雪相态转换的关键。关键词低温雨雪冰冻,冷空气,低空急流AnalysisontheCauseandForecastDeviationofaLow-TemperatureFreezingRainandSnowDisasterinChangshain2022LijunCheng,YunFang*ChangshaMeteorologicalBureau,ChangshaHunanReceived:Jun.16th,2023;accepted:Jul.14th,2023;published:Jul.21st,2023AbstractUsinghigh-altitudeandgroundobservationdata,numericalmodeldataandradardata,formationcauseandforecastdeviationofalow-temperaturefreezingrainandsnowdisasterinChangsha*通讯作者。程理君,方韵DOI:10.12677/ccrl.2023.124075723气候变化研究快报fromFebruary6to9,2022wereanalyzed.Theresultsshowedthat:1)thewholesnowfallprocesswasdividedintotwostages.Rain/snowareasweregraduallyadvancingfromwesttoeast.2)Thefirststageisthatthelowtroughmovestotheeastandcontinuouslyguidesthecoldairsouthwardintheprocesswhilethecondstageisthatstrongcoldadvectionleadstothelowtroughdevelop-ing.3)Thelow-leveljetprovidesgoodwatervaporconditionsforthetwostagesandthetemper-aturebelow0˚Cwasthekeyfactorforprecipitationphase.KeywordsLow-TemperatureFreezingRainandSnow,ColdAir,Low-LevelJetCopyright©2023byauthor(s)andHansPublishersInc.ThisworkislicensedundertheCreativeCommonsAttributionInternationalLicense...