| 摘要: |
| 利用常规观测、多普勒雷达、NCEP再分析等资料对2016年9月24日通辽市库伦旗龙卷发生的环境条件和雷达回波特征进行分析，结果表明：此次龙卷过程发生在高空槽前、中高层急流北侧、低空急流左侧和地面气旋暖区一侧,是由超级单体引发的；干线和地面冷锋是强对流发生的直接触发机制,龙卷发生在干线附近靠湿区一侧；基本反射率因子图上呈现入流缺口和钩状回波，反射率垂直剖面图上存在低层弱回波和中高层回波悬垂，大于55 dBz回波高度超过11 km中气旋生成后强度有增大的过程，有利于龙卷天气产生。 |
| 关键词: 龙卷；超级单体；中气旋 |
| DOI： |
| 投稿时间：2019-12-12 |
| 基金项目: |
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| Observation and Analysis of a Tornado Process in Tongliao in September 2016 |
| GUO Luyan,WAN Yu,YU Jiaqi,QI Jiahui |
| (Tongliao Meteorological Office of Inner Mongoliao, Tongliao 028000 ,China) |
| Abstract: |
| The analysis on the environmental condition and characteristics of radar echo of the tornado in Kulun, Tongliao on 24 September 2016 is based on the data of conventional observation, Doppler weather radar and NCEP reanalysis data The results show that: The tornado was triggered by the supercell and took place in front of the high-altitude trough, on the north side of the mid-level and high-level jet stream, on the left side of the low-level jet stream, and on the side of the ground cyclone warm zone; The dry line and the cold front are the direct triggering mechanism of strong convection, the occurance of the tornado is close to the moist area of the dry line. The characteristics of “inflow gap” and “hook echo” are presented in the basic reflectivity factor figure, and there is a Weak echo area in the vertical section of basic reflectivity factor figure, which is greater than 55 dBz echo. The altitude exceeds 11 km; The intensity has increased after the formation of cyclone,which is conducive to the generation of tornado weather. |
| Key words: tornado；supercell；cyclone |
