| 一次连续性暖区暴雨过程的诊断分析 |
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| 引用本文： | 邱钜燎,薛宇峰,陈宝连,钟倩媚.一次连续性暖区暴雨过程的诊断分析[J].现代农业科技,2020(17). |
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| 作者姓名： | 邱钜燎 薛宇峰 陈宝连 钟倩媚 |
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| 作者单位： | 广东海洋大学,广东海洋大学,广东海洋大学,广东海洋大学 |
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| 摘 要： | 利用常规气象观测资料和ERA5逐时再分析资料,对2019年4月18-19日华南地区出现的一次连续性暖区暴雨过程进行了诊断分析。结果表明：此次暴雨过程主要是受气旋性环流切变、西南低空急流影响而形成的暖区对流性强降水天气过程。500hPa副高呈带状分布,强度偏弱,位置偏南,气旋性环流自西向东影响了江南地区；华南地区地面呈东高西低的形势,广东始终处在地面低压前部偏南风的控制下；850hPa和700hPa受西南低空急流的影响,配合以风速或切变形成的低层辐合,高空200hPa对应强的辐散流场；华南至江南一带南低北高的地势,对地面偏南风或西南风起到了很好的抬升作用,这些因素共同作用,形成了这次连续性暖区暴雨过程。
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| 关 键 词： | 华南 暖区暴雨 诊断分析 |
| 收稿时间： | 2020/4/13 0:00:00 |
| 修稿时间： | 2020/4/13 0:00:00 |
Diagnostic Analysis of a Continuous Warm-Sector Torrential Rain |
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| Authors: | XUE YuFeng and |
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| Institution: | GuangDong Ocean University,ZhanJiang,524088;China,, |
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| Abstract: | By using of meteorological observation data and hourly reanalysis data of ERA5, a diagnostic analysis is made on the process of a continuous warm-sector torrential rain in south China during April 18-19, 2019.The results show that the process of this rainstorm is mainly convective heavy rainfall in the warm area under the influence of cyclonic circulation shear and southwest jet stream. The subtropical height of 500hPa shows a zonal distribution, with weak intensity and southerly position. The cyclonic circulation affects the regions south of the Yangtze River from west to east. The ground in South China is high in the east and low in the west. The 850hPa and 700hPa are influenced by the southwest jet stream and are combined with the convergence of the lower layer formed by wind speed or shear, and the high altitude of 200hPa corresponds to a strong divergence flow field. The south low and north high terrain from south China to the south of the Yangtze River plays a good role in lifting the southerly wind or southwest wind on the ground, and these factors work together to form the continuous rainstorm process in the warm sector. |
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| Keywords: | South China warm-sector torrential rain diagnostic analysis |
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