| 冀南平原7·27局地大暴雨中尺度特征分析 |
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| 引用本文： | 耿飞,霍朝阳,魏鸣,刘笑.冀南平原7·27局地大暴雨中尺度特征分析[J].新疆气象,2023,17(6). |
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| 作者姓名： | 耿飞 霍朝阳 魏鸣 刘笑 |
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| 作者单位： | 南京信息工程大学,南京信息工程大学,南京信息工程大学,邢台市气象局, |
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| 基金项目： | 国家自然科学基金(41675029)、河北省自然科学基金项目(D2020108049) |
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| 摘 要： | 为提高对短时局地强降水系统演变的认识,探索短时强降水天气特征及成因,利用FY-4A气象卫星及天气雷达遥感产品,并借助地面及探空资料,对2019年7月27日冀南平原一次局地大暴雨过程进行中尺度时空演化特征分析。结果表明,本次过程是在副热带高压外围,受高空槽以及低层切变线影响生成的局地强降水天气。降水系统内的对流组织主要经历了“新生发展-合并加强-降水维持-移出消散”的演化过程。本次冀南平原地区大暴雨的成因主要包括：两个初期发展的对流系统的合并加强,前期外围对流活动提供了充沛的水汽环境,强对流系统形成了低层旋转、中层强辐合的中尺度垂直环流结构,各层辐合中心空间位置基本一致,有利于水汽供应并维持云中液滴的高效碰并增长。研究结果对冀南平原短时强对流天气的临近预报预警提供了科学依据。
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| 关 键 词： | 冀南平原 短时暴雨 中尺度 对流演化 |
| 收稿时间： | 2021/3/30 0:00:00 |
| 修稿时间： | 2021/8/10 0:00:00 |
Analysis of Mesoscale Characteristics of a Local Rainstorm on July 27 in the South Hebei Plain |
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| Gengfei,Huozhaoyang,Weiming,Liuxiao and.Analysis of Mesoscale Characteristics of a Local Rainstorm on July 27 in the South Hebei Plain[J].Bimonthly of Xinjiang Meteorology,2023,17(6). |
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| Authors: | Gengfei Huozhaoyang Weiming Liuxiao and |
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| Institution: | Nanjing University of Information Science & Technology,Nanjing University of Information Science & Technology,Nanjing University of Information Science & Technology,Xingtai Meteorological Bureau, |
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| Abstract: | In order to improve the understanding of the evolution of short-term local heavy rainfall system, and explore the characteristics and causes of short-term heavy rainfall, the mesoscale spatiotemporal evolution characteristics of a local heavy rainstorm on July 27, 2019 in the southern Hebei Plain were analyzed by using Fy-4A meteorological satellite, weather radar remote sensing products, ground-based and sounding data. The results show that this process is a local heavy rainstorm generated by the upper-altitude trough and the low-level shear line on the periphery of the subtropical high. The convective organization in the rainstorm system shows an evolutionary process of "new development, merging and strengthening, maintenance, migration and dissipation". The main causes of the heavy rainstorm in the southern Hebei Plain include: Merging and strengthening of two early developing convective systems, the early stage of the peripheral convection provides abundant water vapor environment; Middle mesoscale vertical circulation structure with strong rotating in the lower atmosphere and strong convergence in the middle atmosphere; The convergence center in each layer space position is advantageous to the water supply and maintain efficient touch the cloud droplets and growth. The results provide a scientific basis for the near forecast and early warning of short-term severe convective weather in the southern Hebei Plain. |
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