一次雨转暴雪天气过程卫星云图中尺度特征分析  

Analysis on Mesoscale Characteristics of Satellite Cloud Images for A Rain to Blizzard Weather Process

作　　者：邵建 任小芳 王勇 裴晓蓉 李强[1,3] 张晓茹 Shao Jian;Ren Xiaofang;Wang Yong;Pei Xiaorong;Li Qiang;Zhang Xiaoru(Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions,Yinchuan 750002,China;Yinchuan Meteorological Bureau,Yinchuan 750002,China;Ningxia Meteorological Observatory,Yinchuan 750002,China)

机构地区：[1]中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室,宁夏银川750002 [2]银川市气象局,宁夏银川750002 [3]宁夏气象台,宁夏银川750002

出　　处：《宁夏大学学报（自然科学版）》2023年第2期181-187,共7页Journal of Ningxia University(Natural Science Edition)

基　　金：宁夏重点研发基金资助项目(2018BEG03002);中国气象局预报员专项基金资助项目(CMAYBY2019-131);宁夏青年拔尖人才培养基金资助项目(2017)。

摘　　要：基于NCEP逐日再分析资料、常规地面高空观测资料、FY-2卫星云图资料,从大尺度环流背景、多尺度影响系统相互作用、卫星云图演变特征等方面,分析2016年10月26至27日宁夏秋末雨转暴雪天气过程的卫星云图特征.结果表明,该次过程的主要影响系统为地面冷锋、850 hPa切变线、700,500 hPa高空槽和200 hPa西风急流;过程中可见光、红外和水汽图上各云团的特征明显.在对应近地面天气尺度和中尺度系统的移动发展中,β尺度云团以类似“列车效应”的现象先后过境,它是造成该次暴雪过程的主要原因.云顶亮度温度TBB值的变化在雨雪转化过程中无明显特征,但在相态转为降雪后,其变化与降雪强度的关系较为明显.Based on NCEP daily reanalysis data,conventional ground altitude observation data and FY-2 Satellite cloud image data,the article analyzed the satellite cloud image characteristics of rain to Blizzard weather process in late autumn of Ningxia from October 26 to 27,2016 from the aspects of large-scale circulation background,multi-scale influence system interaction,satellite cloud image evolution characteristics,etc.The analysis shows that the main impact system of this process is ground cold front,850 hPa shear line,700,500 hPa high-altitude trough and 200 hPa westerly jet;the characteristics of clouds on visible light,infrared and water vapor maps are obvious.βscale clouds transit successively in a phenomenon similar to“train effect”in the mobile development of the near surface synoptic scale and mesoscale system,which is the main cause of this blizzard process.The change of the brightness temperature TBB value of the cloud top has no obvious characteristic in the process of rain-snow transformation,however,the relationship between the change and the snowfall intensity is more distinct after its phase transitions to snowfall.

关 键 词：暴雪 卫星云图 中尺度系统 

分 类 号：P458[天文地球—大气科学及气象学]