| 江苏沿江地区一次雷暴大风天气的中尺度特征分析 |
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| 引用本文： | 吴彩霞,王坤,彭小燕,顾天真,李超.江苏沿江地区一次雷暴大风天气的中尺度特征分析[J].现代农业科技,2021,6(6). |
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| 作者姓名： | 吴彩霞 王坤 彭小燕 顾天真 李超 |
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| 作者单位： | 南通市气象局,南通市气象局,南通市气象局,南通市气象局,南通市气象局 |
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| 基金项目： | “北极阁”开放研究基金(BJG201705)；江苏省气象局预报员专项基金(JSYBY202006) |
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| 摘 要： | 利用常规气象资料、雷达及NCEP 1°×1°再分析资料,对江苏沿江地区一次雷雨大风过程的天气形势、热动力因子及中尺度特征进行分析,研究此次雷暴大风天气的成因。结果表明:此次雷暴大风天气发生在副热带高压边缘,前倾槽、中低层切变线和地面辐合线是主要影响系统,冷暖空气交汇导致不稳定能量触发;大的CAPE值提供了充足的水汽与能量条件;高空辐散与低空辐合的配置为雷暴大风的形成和维持提供有利的动力条件;VIL值达到最大后快速减小对雷暴大风灾害的预警具有指示意义。
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| 关 键 词： | 雷暴大风 物理量分析 雷达中尺度特征 |
| 收稿时间： | 2020/10/22 0:00:00 |
| 修稿时间： | 2020/10/22 0:00:00 |
Mesoscale Characteristics of a Thunderstorm Wind Event over the Area Along Yangtze River in Jiangsu Province |
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| Abstract: | Based on the conventional meteorological data, radar and NCEP 1o×1o reanalysis data, the synoptic situation, thermal dynamic factors and mesoscale characteristics of a thunderstorm wind process along the Yangtze River in Jiangsu Province are analyzed, to study the causes of this thunderstorm wind event. The results show that: the thunderstorm occurred at the edge of the subtropical, the forward trough, the shear line of the lower and middle layers and the convergence line of the ground are the main influence system, the convergence of cold and warm air leads to the triggering of unstable energy; The Large Cape provides sufficient conditions for water vapor and energy, the divergence at high altitude and convergence at low altitude provide favorable dynamic conditions for the formation and maintenance of thunderstorm wind, and the rapid decrease of VIL value when it reaches its maximum, it has directive significance to the early warning of thunderstorm wind. |
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| Keywords: | thunderstorm wind physical quantity analysis radar mesoscale characteristics |
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