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[1]高志博,周筠珺,尹舒悦,等.成都地区一次超级单体风暴的观测分析与数值模拟[J].成都信息工程大学学报,2019,(04):392-402.[doi:10.16836/j.cnki.jcuit.2019.04.012]
　GAO Zhibo,ZHOU Yunjun,YIN Shuyue,et al.A Mesoscale Numerical Simulation of a Supercell Storm in Chengdu Area[J].Journal of Chengdu University of Information Technology,2019,(04):392-402.[doi:10.16836/j.cnki.jcuit.2019.04.012]

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成都地区一次超级单体风暴的观测分析与数值模拟

成都信息工程大学学报[ISSN:1006-6977/CN:61-1281/TN] 卷: 期数: 2019年04期页码: 392-402 栏目: 大气科学出版日期: 2019-10-20

Title:: A Mesoscale Numerical Simulation of a Supercell Storm in Chengdu Area

文章编号:: 2096-1618(2019)04-0392-11

作者:: 高志博¹; 2; 周筠珺¹; 3; 尹舒悦¹; 于灏 ¹; 4; 胡丹¹; 5; 白舸¹; 刘思畅¹; 5; (1.成都信息工程大学高原大气与环境四川省重点实验室,四川成都 610225; 2.北京师范大学地表过程与资源生态国家重点实验室,北京 100081; 3.南京信息工程大学气象灾害预警预报与评估协同创新中心,江苏南京 210044; 4.北京师范大学系统科学学院,北京 100081; 5.中国科学院大气物理研究所气候变化研究中心,北京 100029)

Author(s):: GAO Zhibo¹; 2; ZHOU Yunjun¹; 3; YIN Shuyue¹; YU Hao¹; 4; HU Dan¹; 5; BAI Ge¹; Liu Sichang¹; 5; (1. The Plateau Atmosphere and Enviroment Key Laboratory of Sichuan Province, Chengdu University of Information Technology Chengdu 610225,China; 2.State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 10081,China; 3.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China; 4.College of System Science,Beijing Normal University,Beijing 100081,China; 5.Climate Change Research Center,The Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China)

关键词:: 天气学; 中尺度气象; 超级单体; 成都地区; 观测分析; 数值模拟

Keywords:: weather science; mesometeorology; Chengdu area; supercell; observation analysis; numerical simulation

分类号:: P446

DOI:: 10.16836/j.cnki.jcuit.2019.04.012

文献标志码:: A

摘要:: 为提高成都地区超级单体的预报质量,利用成都多普勒雷达资料、NCEP再分析资料以及 WRF模式,对2015年7月27日成都地区一次超级单体过程进行观测分析与数值模拟。将模拟结果与观测资料进行对比,模式很好地模拟了此次超级单体过程。模拟结果表明:此次超级单体是由一个孤立单体发展而成的,在径向速度图上负速度区对应钩状回波中的弱回波区,表明弱回波区为超级单体的入流区。超级单体在爆发之前中低层存在一个显著的逆温层,之后发展为湿层,中高层有干冷空气侵入,低层有水汽流入。500 hPa层上成都地区东西方向出现一个涡度对,气流从成都地区的东部上升,西部下沉,成都地区东西两侧为辐合区,东部的辐合区对应涡度场的正涡度区。风暴中的上升气流有很强的旋转性。

Abstract:: In order to improve the forecast quality of supercells in Chengdu area, a numerical simulation of a heavy supercell storm in Chengdu on July 27,2015 is implemented by using Doppler radar data, NCEP reanalysis data and the mesoscale WRF model. Comparing the simulation results with the observed data, the model simulates this supercell process very well.The results show that the supercell is developed from an isolated monomer. In the radial velocity diagram, the negative velocity region corresponds to the weak echo region in the hook echo, indicating that the weak echo region is the inflow region of the supercell. Before the outbreak of the supercell, there was a significant inversion in the middle and lower layers. When the supercell broke out, the inversion layer at the middle and lower layers disappeared and developed into a significant wet layer. Dry and cold air intruded into the upper and middle layers. Low-level water vapor flows into Chengdu area. A significant vorticity pair appears in the east-west direction of Chengdu area on the 500 hPa layer. The air flow rises from the east of the Chengdu area and sinks in the west. The east and west sides of the Chengdu area are convergence areasandthe convergence zone in the east corresponds to the positive vorticity zone of the vorticity field. The updraft has a strong rotation.

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备注/Memo

收稿日期:2018-06-11 基金项目:国家级大学生创新计划资助项目(201610621027)

更新日期/Last Update: 2019-10-20