您好, 访客   登录/注册

满洲里市一次强降雪天气过程分析

来源:用户上传      作者:彭鹏

  摘要:文利用地面观测资料、NCEP再分析资料、台站观测资料等对2018年4月13~14日满洲里市一次强降雪天气过程进行分析。结果表明:在强降雪天气出现的过程中,南支槽前西南暖湿气流和槽底西北气流的共同影响促进了强降雪天气的发生发展;在强降雪天气出现的过程中,满洲里市存在高层散度大于低层的有利配合状态,这种对流低层辐合、高层辐散的配置,对于中低层气流的上升运动较为有利,促进了强降雪天气的发生发展;由于水汽条件较为充足,对于降雪天气的发生较为有利,孟加拉湾是此次强降雪天气的主要水汽来源,而水汽辐合最为明显的地区则存在有降水中心;在冬季,满洲里市的假相当位温数值高于55℃,同时还有高能舌存在,可以将其作为当地强降雪天气的预报指标。
  关键词:强降雪天气成因物理量场满洲里市
  中图分类号:P458文献标识码:A文章编号:1672-3791(2022)07(b)-0000-00
  AnalysisofaStrongSnowfallWeatherProcessinManzhoulifromApril13to14,2018
  PENGPeng
  (InnerMongoliaManzhouliMeteorologicalBureau,Manzhouli,InnerMongoliaAutonomousRegion,021600China)
  Abstract:Basedongroundobservationdata,NCEPreanalysisdataandstationobservationdata,thispaperanalyzesastrongsnowfallweatherprocessinManzhouliCityfromApril13to14,2018.Theresultsshowthatduringtheoccurrenceofheavysnowfall,thejointinfluenceofsouthwestwarmandhumidairflowinfrontoftheSouthBranchtroughandnorthwestairflowatthebottomofthetroughpromotestheoccurrenceanddevelopmentofheavysnowfall;Intheprocessofstrongsnowfallweather,thereisafavorablecooperationstatethatthedivergenceoftheupperlayerisgreaterthanthatofthelowerlayerinManzhouliCity.Thisconfigurationofconvectiveconvergenceanddivergenceofthelowerlayerismorefavorablefortheupwardmovementoftheairflowinthemiddleandlowerlayer,andpromotestheoccurrenceanddevelopmentofstrongsnowfallweather;Duetosufficientwatervaporconditions,itisfavorablefortheoccurrenceofsnowweather.ThebayofBengalisthemainwatervaporsourceofthisheavysnowweather,andthereisaprecipitationcenterintheareawiththemostobviouswatervaporconvergence;Inwinter,thepseudoequivalentpotentialtemperatureinManzhouliCityishigherthan55℃,andthereisahigh-energytongue,whichcanbeusedasapredictionindexoflocalstrongsnowfallweather.

nlc202207152152



转载注明来源:https://www.xzbu.com/8/view-15436108.htm

相关文章