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中低纬山地气象Mid-low Latitude Mountain Meteorology Vol.44Nu.6 Dec,2020第44卷第6期2020年12月文章编号：2096-5389(2020)06-0002-08贵州铜仁一次罕见暴雪过程分析冉仙果2,胡萍0,杨群0,聂云0,舒亦菲0(2.贵州省沿河土家族自治县气象局，贵州沿河565300；.贵州省铜仁市气象局，贵州铜仁554300)扌商要：该文利用常规探测资料、NCEP再分析资料和多普勒C达资料，对2012年12月29—38日铜仁市暴雪过程的环流形势特征与成因进行分析，结果表明：此次暴雪过程发生在高空南支槽、多波动槽东移、00hPt西南暖湿急流输送及954IhP东北回流冷垫的环流背景下，表现出持续时间长、范围广、强度大、积雪深的特征;强降雪阶段对流层低层有来自孟加拉湾的源源不断的水汽输送，湿层厚度增强,且有较强的水汽辐合;700hP&较强的垂直上升运动及对流层中低层较强的垂直风切变有利于暴雪天气的发生;强降雪时刻暴雪区800hPt以上位于高层冷平流、低层暖平流的叠加区域，为不稳定大气;此次降雪具有对流性和持续性特征,C达反射率回波云团具有列车效应。
关键词：暴雪;南支槽;水汽输送;西南急流;东北回流中图分类号:P453.1+2文献标识码:2Analysis of a Rare Blizzard Process in Tongren,GuizhouRAN Xitydu2,HU Piny2,YANG Qun0,NIE Yun2,SHU Yifet2(1.Ythe Meteorological Statiou of Guizhou Province,Ythe545300,Chinn；0.Touyreo Meteorological Bureau of Guizhou Province,Tonyreo554380,Chinn)Abstroct:Usiny couveatioual eetectiou eta,NCEP reanalysis dua any Doppleo raUur dua；tie circalatiou chudcteristics u V causes of tie blizzud process in Touyrea city ou December29ta38 ,2012wero analyzet.The resulis show thut the blizzaro occarree unnec the circalatiou bucOyrounV of the soutaem suppoo iTOuuh,the eestwaro movemeet of the miilti-wlve irouuh,ihe700hPl southwest wami w C je iransuort ant the954hPl northeesi reflueai coli pl.Ii hne the caaracteristica of lony Uuratiou,wine ranye,yreni inteasita ant Ucp snow cavee.In the stane o f heave snowfall,there in n coutinnoue watee vanoe transuoie from Bepyai Bny in the lowee trouosppere,ant the wet layee thicaeae with strouyee watee vanoe couveraeace.The700I i P s strouy artical upwu C movemeai and the strony artical wint sheer in the minUe ant lowee trouosppero are couVucive te theof blizzarO weathee.Ai the time of heave snowfll,the blizzarO area anove850hPa it located in the supemosition repiou of coli anvectiou in the upper layee ant warm anvectiou in the lowee tayee,ant it it an unstanie atmosppere. The stowfali hat couvective and persisteni cOaracteristico,ant the ranae reflectivite echo clouU hat train effed.Key words:blizzarO;southem trouuh;watee vanoe transtort；southwest jet;the northeast bacOflow0引言贵州冬季冻雨天气出现较多,雨夹雪次之，大雪或暴雪天气（称为降雪）偶有出现⑴，而一旦出现降雪天气和冻雨天气，将出现长时间的道路结冰、电线结冰等持续性灾害天气，对交通、工农业生产收稿日期：2019-11-29第一作者简介:冉仙果（1992—）,男,助工,主要从事县级综合业务研究,E-man：438496358@。
西藏高原西南部地区一次暴雪天气过程诊断分析罗布坚参;德吉白珍;次仁朗杰【摘要】The weather process of a snowstorm event in the southwest region of the Tibetan Plateau on January 17 to 19,2013 was comprehensively analyzed using the NCEP/NCAR (National Centers for Environmental Predic-tion/National Center for Atmospheric Research)reanalysis data with resolution of 2.5 °×2.5 °,conventional mete-orological data and satellite cloud images in this study.The results show that the circulation situation during the snowstorm event in the southwest region of the Tibet Plateau is characterized by two troughs and two ridges at the middle and higher latitudes.The deep southern branchtrough,southwesterly jet stream,and the Western Pacific subtropical high are the main influencing systems of the snowstorm event.The cyclonic vorticity reaches 15.0 ×10 -5 s-1 during the snowstorm event,and the convergence at lower levels and divergence at middle and higher levels favor the ascending motion of the air.The positive divergence near 250 hPa is 3.5 ×10 -5 s-1 ,and the powerful suction effect at middleand higher levels and the strong ascending motion play important roles in the snowstorm occurrence.Water vapor mainly comes from the Arabian Sea,and the increasing water vapor flux and its moving northeastwards divergence center indicate that water vapor is transported continually by warm and hu-mid southwesterly flows and converges over the snowstorm area.Meanwhile,the orographic uplifting effect is fa-vorable for thecondensation of water vapor.The temperature of black body(TBB)obviously decreases when the clouds reach over the TibetPlateau.TBB drops below -50 ℃ when clouds reach over the snowstorm area,and it is even lower than-60 ℃ over the Burang area in the western Tibet Plateau.%利用NCEP／NCAR的2.5°×2.5°逐6 h再分析资料、常规气象观测资料和卫星云图资料，对2013年1月17—19日西藏高原西南部地区的一次暴雪天气过程进行了综合分析。
农业灾害研究2021，11（9）作者简介 梁效铭（1994—），男，云南建水人，助理工程师，主要从事综合气象研究工作。
收稿日期 2021-06-01Analysis on the Causes and Characteristics of a Winter Rainstorm in Hekou CountyLIANG Xiao-ming (Hekou County Meteorological Bureau, Honghe, Yunnan 661300)Abstract Analyzed a continuous winter rainstorm weather process in Hekou County from Dec. 14th to Dec. 15th, 2013 through conventional observation data, NCEP reanalysis data and automatic weather station observation data. The results show that: in this process, the middle and high-level deep south branch trough from the Bay of Bengal quickly strengthened eastward, the trough low penetrated into the middle of the Bay of Bengal, the strengthening southwest jet stream in front of the trough transported warm and humid air to southern Yunnan, and the bottom shear line moved southward. At the same time, in conjunction with the ground cold front, it led to the continuous rainstorm in the winter of the estuary; during this process, the warm and humid airflow from the Bay of Bengal in the middle and lower layers formed an energy accumulation area and a strong water vapor convergence area in the estuary area, which is continuous Strong rainfall provides sufficient water vapor; the estuary area has strong upward movement under the coupling effect of bottom-level convergence and mid-to-high-level divergence. In addition, the warm and humid air flow in front of the trough is forced to uplift by the low-level cold air and topography, which further strengthens The convergent ascending movement of the entire layer provides a good dynamic uplifting mechanism for the occurrence and development of this heavy rainfall; due to topographical reasons, after cold air enters the estuary, it is affected by the valley and mountainous terrain to form a cold cushion on the side of the windward slope in front of the mountain Accumulated and accumulated convectively unstable energy becomes the trigger mechanism of this process.Key words Winter heavy rain; South branch trough; Shear line; Cold air河口县一次冬季暴雨天气过程成因特征分析梁效铭河口县气象局，云南红河 661300摘要 利用常规观测资料、NCEP再分析资料和自动气象站观测数据，分析了2013年12月14—15日河口县一次持续性的冬季暴雨天气过程。
不同触发条件下吉林省一次极端暴雪大风天气过程诊断分析王宁;秦玉琳;姚帅;王婷婷;牛立强【摘要】利用常规气象观测资料、区域自动气象站降水观测资料和NCEP(National Centers for Environmental Prediction)的1°×1°逐6 h再分析资料,对2015年2月21-22日吉林省一次极端暴雪大风天气过程进行诊断分析.结果表明:高空冷涡配合地面蒙古气旋东移发展为形成暴雪的重要因素,850 hPa温压场反位相叠加符合吉林省典型大风天气的形势.此次降雪过程可以分为暖区和冷区降雪两个阶段,第一个阶段降雪由低空南风急流触发,来源于渤海和黄海的水汽异常丰沛,动力条件相对较弱;第二个阶段降雪水汽条件弱于第一个阶段,水汽主要来源于低涡北部的偏东风急流和偏北风急流,汇集日本海的水汽集中向西输送,但动力条件强于第一个阶段降雪,强降雪期间伴随明显的干侵入及锋生过程,冷空气作用显著.强降雪发生时,回波强度一般为15-25 dBz,且回波高度≤4 km,同时冷区降雪强度还与切变线的加强和冷空气的入侵密切相关.%An extreme blizzard and gale weather process over Jilin province on February 21 to 22 in 2015 was diagnosed and analyzed using the conventional meteorological observation data,regional automatic station precipitation data and the NCEP (National Centers for E nvironmental Prediction) 1°×1° 6-hourly reanalysis data.The results show that a high-level cold eddy combining with eastern expansion of the ground Mongolia cyclone is a main factor influencing this blizzard weather event.Overlaying of temperature and pressure fields at 850 hPa in reverse phase is consistent with the typical gale weather situation over Jilin province.Corresponding snowfall process can be divided into two phases,namely,snowfall at warm and then coldareas.The first phase of snowfall is triggered by the low-level southerly jet with an abnormally abundant water vapor coming from Bohai and Yellow Sea.The dynamic conditions in this phase are relatively weak.In the second phase,the water vapor condition is weaker than in the first phase.It is mainly due to the westerly transport of water vapor converging at the Sea of Japan,which is controlled by the easterly and northerly jets in the north part of the low vortex.While its dynamic conditions are stronger than those of the first phase.During the heavy snowfall period,the dry intrusion and frontogenesis process are obvious,and the role of cold air is significant.When the heavy snowfall occurs,the echo intensity is general within 15-25 dBz,and the echo height is equal or less than 4km.Meanwhile,the snowfall intensity in the cold area is closely related to the strengthening of shear line and the invasion of cold air.【期刊名称】《气象与环境学报》【年(卷),期】2017(033)003【总页数】9页(P1-9)【关键词】水汽输送;干侵入;动力垂直结构;锋生过程;雷达回波【作者】王宁;秦玉琳;姚帅;王婷婷;牛立强【作者单位】吉林省气象台,吉林长春 130062;吉林省气象台,吉林长春 130062;吉林省气象台,吉林长春 130062;吉林省气象台,吉林长春 130062;吉林省气象台,吉林长春 130062【正文语种】中文【中图分类】P458.1+21引言地处北半球中高纬度地区的吉林省，年平均气温较低，暴雪为吉林地区的主要灾害性天气之一。
December 18,2020 （CNN）Historic snowfalls of up to 45 inches blanket U.S. Northeast 美国东北部地区降雪量达到了百年一遇的45英寸A winter storm piled historic amounts of snow onto parts of the U.S. Northeast on Thursday and wreaked havoc throughout the region, hobbling if not paralyzing travel as it moved up the coast and bore down on New England.周四，一场冬季暴风雪给美国东北部部分地区带来了史无前例的大量降雪，并对整个地区造成了严重破坏。
暴风雪沿着海岸向新英格兰地区移动，即使没有造成交通瘫痪，但也阻碍了旅行。
The first major snowstorm of the season, which was expected to move out to sea by the end of Thursday, prompted officials to urge the region's 50 million residents to stay home, a warning many had been routinely issuing anyway because of the pandemic.本季的第一场大暴风雪预计将于周四结束前移向大海，该地区官员敦促当地5,000万居民留在家中。
由于流感大流行，许多人已经按照惯例发出了这一警告。
"Given the heavy (snow) and difficult travel conditions, drivers are encouraged to stay off the road if they can during the storm," Massachusetts Governor Charlie Baker said on Twitter.马萨诸塞州州长查理·贝克在推特上说:“考虑到大雪和恶劣的交通条件，司机们被鼓励在风暴期间尽可能远离道路。
一次华北气旋造成的北京特大暴雪天气过程分析詹正杰;尹仔锋;乔林;王将;孙秀忠;赵玮【摘要】Using the wind profile products from the Beijing Yanqing railway station and Haidian station, microwave radiometer products, radar products from the southern outskirts of Beijing city and Chedaogou station,observation data of weighing rain-gauge data from 58 stations,FY-2E satellite images and conventional meteorological data, the Beijing Blizzard weather process on November 3 to 4 in 2012 was analyzed. The result shows that:the precipitation phase (rain, snow) is determined by frontal properties and frontal location of the North China cyclone; the process is determined by the intensity and duration of rain and snow cyclone with water vapor channel; the wind profile and microwave radiometer data of the rain and snow had obviously indicative function for the start time and precipitation phase change.%利用北京延庆站和海淀站风廓线产品、微波辐射计产品、北京市雷达产品（南郊和车道沟）、北京市58个称重雨量站观测资料、FY-2E卫星云图、常规气象资料，综合分析了2012年11月3-4日北京暴雪天气过程。
Journal of Agricultural Catastrophology 2022, Vol.12 No.5作者简介 李晓坤（1984—），女，山西怀仁人，工程师，主要从事短期、短时临近天气预报工作。
收稿日期 2022-01-20Analysis of an Extreme Snowstorm Weather Process in Xilin Gol League in November 2021LI Xiaokun (Xilin Gol League Meteorolog-ical Bureau, Xilin Hot, Znnor Mongolia 026000) Abstract From November 5 to 8, 2021, Xilin Gol League (hereinafter referred to as Ximeng) experienced the first strong snowfall in late autumn and early winter. The heavy snowfall process had wide influence range, high intensity and long duration, with characteristics of rain and snow conversion, accompanied by fog and haze, strong wind and snowstorm. The daily snowfall in xiwuzhumuqin banner broke through the historical extreme value, and Erlianhot, Sunit Left Banner The daily snowfall in Zhengxiang white banner, Taipusi Banner, Zhenglan Banner and Duolun County exceeds the extreme threshold. The research shows that in the process of heavy snowfall, the interaction between the high-level southwest air flow and the low-level northeast air flow makes the warm and humid air climb along the cold pad, which is conducive to the occurrence of heavy snowfall. The high-altitude jet stream is strengthened, Ximeng is on the left side of the exit area, and the “suction effect” is strengthened. The influence of high slot, low-level wind direction, wind speed shear and ground cold front promotes the strengthening of upward movement, which is conducive to the occurrence of Blizzard weather; The low-level convergence and high-level divergence in the western area of Ximeng, while the low-level divergence and high-level convergence in the eastern area, superimposed with the influence of the cold front, there is an obvious secondary circulation, which is conducive to the further strengthening of the upward movement, resulting in strong snowfall; The specific humidity reaches 2~4 g/kg, and the divergence of water vapor flux is negative. There is a northeast wind jet > 12 m/s at 850 hPa, which is conducive to the continuous transmission of water vapor in the Okhotsk Sea over Ximeng and provide sufficient water vapor conditions; Radar products show that the maximum echo intensity of the basic reflectivity factor in the snowfall weather process is 35 dBz, and the echo influence time is long. The radial velocity shows that the wind force in the near ground layer is 39 m/s, the maximum intensity of the combined reflectivity is 35 dBz, and the echo top height is 6~8 km. OHP products predict that the magnitude of 1-hour precipitation inversion is small.Key words Extreme snowstorm; Cold pad; Radar data2021年11月锡林郭勒盟一次极端暴雪天气过程分析李晓坤锡林郭勒盟气象局，内蒙古锡林浩特 026000摘要 2021年11月5—8日，锡林郭勒盟（以下简称锡盟）出现秋末冬初第一场强降雪天气，此次大暴雪天气过程影响范围广、强度大、持续时间长，存在雨雪转换特征，伴有雾霾、大风、暴风雪天气。
