ZOU Jie,SHU Zhiliang,TIAN Lei,et al.Observation and Analysis of Summer Convective Weather in Liupan Mountain Area of Ningxia[J].Journal of Chengdu University of Information Technology,2024,39(06):749-754.[doi:10.16836/j.cnki.jcuit.2024.06.015]
宁夏六盘山地区夏季对流天气的观测分析
- Title:
- Observation and Analysis of Summer Convective Weather in Liupan Mountain Area of Ningxia
- 文章编号:
- 2096-1618(2024)06-0749-06
- Keywords:
- Liupan Mountain area; radar; convection; instability index
- 分类号:
- P412.1
- 文献标志码:
- A
- 摘要:
- 为探究宁夏六盘山地区的对流天气演变过程,使用宁夏六盘山地区常观观测资料、雷达资料、微波辐射计反演资料等,对2021年6月30日短时雷阵雨和2021年7月27日强降水2次对流过程进行研究。结果表明:(1)强对流天气期间多地雷达基本反射率因子超过40 dBZ,最大达到60 dBZ以上,且形成大面积的层积混合雷达回波。(2)云层结构变化明显,临近对流天气,云层迅速下降。对流时呈强回波特征,回波顶高超过6 km。(3)相对湿度垂直结构在对流天气临近会形成“上干,下湿”的2层结构,温度垂直分布有明显的“上冷下暖”的结构。(4)2次过程不稳定指数K均出现较大波动,临近时最大值超过40 ℃,对流天气持续时间较长时,K指数曲线下降特征不明显,呈持续上升趋势。
- Abstract:
- To investigate the process of convective weather evolution in the Liupan Mountains region of Ningxia,this study utilized commonly used observational data,radar data,microwave radiometer inversion data,and other resources to analyze two convective events:a short-term thunderstorm on June 30th,2021,and a heavy rainfall event on July 27th,2021. The results indicated that(1)Severe convective weather yielded basic reflectivity factors of over 40 dBZ in multiple regions,with a maximum of over 60 dBZ,forming a large,stratified mixture of radar echoes;(2)The cloud structure changed significantly,with clouds quickly descending near convective weather and exhibiting strong echoes,with echo tops rising over 6 km in height;(3)A vertical structure of relative humidity formed where a “dry above,moist below” two-layer structure appeared,alongside a noticeable “cold above,warm below” temperature vertical distribution structure;(4)The instability index K value showed great fluctuations during both events,with a maximum value exceeding 40 ℃ near convective weather. When convective weather persisted over a prolonged period,the K index curve did not display a prominent downward trend,but instead sustained an upward trend.
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备注/Memo
收稿日期:2023-05-28
基金项目:国家自然科学基金资助项目(42075073); 宁夏自然科学基金资助项目(2023AAC03802); 第二次青藏高原科学考察研究资助项目(2019QZKK0104); 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开放研究资助项目(CAMF-202211)
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