2016年1月寒潮与东亚副热带急流关系的研究  

An Analysis on Relationship between East Asia Subtropical Westerly Jet and Cold Wave Event during January 2016

作　　者：李蓉[1] 肖天贵[1] 金荣花 

机构地区：[1]成都信息工程大学大气科学学院,四川成都610225 [2]国家气象中心,北京100081

出　　处：《成都信息工程大学学报》2017年第1期49-55,共7页Journal of Chengdu University of Information Technology

基　　金：国家科技支撑资助项目(2015BAC03B05);国家自然科学基金资助项目(91337215;41575066);国家重点基础研究发展计划资助项目(2013CB733206;2012CB417202)

摘　　要：为分析2016年1月寒潮的酝酿、爆发和结束以及寒潮中长江中下游降温与东亚副热带西风急流之间的关系,利用NCEP/NCAR再分析资料和长江中下游站点温度资料,研究此次寒潮过程及东亚副热带西风急流对长江中下游地区气温的影响,结果得到当急流强度增大时对应的长江中下游地区的平均温度降低,反之当急流强度降低时,长江中下游地区的平均温度则呈现升高状态;而急流位置偏北时长江中下游平均温度升高,急流偏南时对应温度降低。并从波包传播的角度通过波包传播的诊断方法进一步分析本次寒潮中波包的累积和传播,结果得到波包的传播基本能够代表此次寒潮中冷空气的传播方向,能量的蓄积和释放也分别代表着寒潮的酝酿和大幅降温过程。To analyzebrewing, outbreak and end of the cold wave event and the impact of the East Asia subtropical west- erly jet （EASWJ） on Yangtze River region in January 2016, this paperdaily reanalysis data and daily air temperature data to research process of this cold wave event and influences of the jet stream on air temperature in Yangtze River region. The results show that the average temperature in Yangtze River region when the jet stream intensity increases, while the average temperature creases when the jet stream intensity reducesFrom the perspective of the jet stream location,when the jet stream northward, the average temperature rises in Yangtze River region, while the temperature decreases when the jet stream southwardave packet propagation and accumulation during this old wave event by using diagnosis method of wave packet propagation（ WPDresults show that the direction of wave packet propagation represents the spread of cold wave while the accumulation and release of energy are as a symbol of the brewing of cold wave and significant cooling process.

关 键 词：大气科学 寒潮 波能传播特征 东亚副热带西风急流 急流强度指数 急流位置指数 

分 类 号：P458.122[天文地球—大气科学及气象学]