| 2019年9月12—14日陇南市持续性暴雨天气成因分析 |
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| 引用本文： | 宁和平,段秀兰,张锋.2019年9月12—14日陇南市持续性暴雨天气成因分析[J].现代农业科技,2023(22):136-140+146. |
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| 作者姓名： | 宁和平 段秀兰 张锋 |
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| 作者单位： | 甘肃省陇南市气象局 甘肃武都746000,甘肃省陇南市气象局 甘肃武都746000,甘肃省陇南市气象局 甘肃武都746000 |
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| 基金项目： | 甘肃省气象局项目“陇南雷产品达在短时临近预报预警中的应用研究”(Ms2021-12)。 |
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| 摘 要： | 本文对2019年9月12—14日陇南市出现的一次持续性暴雨天气过程的成因进行了分析。结果表明：此次强降水天气过程中副热带高压外围有较强的西南气流稳定维持，同时700 hPa存在明显的强风速带的辐合，低层强烈辐合为暴雨的发生、发展提供了动力条件；对物理量场分析发现，这次持续暴雨过程中，中低层有明显的湿层及水汽辐合，为降水提供了充足的水汽条件；对流云团演变特征表明，此次持续性强降水是在青海东南部的对流云与四川北部的对流云系东移合并加强后逐渐减弱的过程中发生的，具有明显的局地性。
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| 关 键 词： | 暴雨 副热带高压 切变线 低空急流 辐合 对流云团 甘肃陇南 2019年9月12—14日 |
| 收稿时间： | 2023/3/8 0:00:00 |
| 修稿时间： | 2023/3/8 0:00:00 |
The Causes of Analysis of the Continuous Rainstorm in Longnan, Gansu Province from 12 to 14 September 2019 |
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| Abstract: | Through the analysis of the causes of the continuous rainstorm weather process in Longnan, Gansu Province from September 12 to 14, 2019, it is shown that there is a strong southwest airflow stable maintenance in the periphery of the subtropical high during the strong precipitation weather process. At the same time, there is an obvious convergence of strong wind belt at 700 hPa, and the strong convergence in the lower layer provides the dynamic conditions for the occurrence and development of the rainstorm.Through the analysis of the physical quantity field, it is found that there is an obvious convergence of moisture and water vapor in the middle and lower layers during the continuous rainstorm process, which provides sufficient water vapor conditions for precipitation. |
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| Keywords: | the Western Pacific Subtropical High Shear Line Low-level Jet Convergence convective cloud |
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