| 2018年7月6日甘南玛曲局地暴雨天气过程技术总结 |
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| 引用本文： | 王成福,罗王军.2018年7月6日甘南玛曲局地暴雨天气过程技术总结[J].现代农业科技,2020(12). |
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| 作者姓名： | 王成福 罗王军 |
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| 作者单位： | 甘肃省甘南藏族自治州气象局,甘肃省甘南藏族自治州气象局 |
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| 摘 要： | 2018年7月6日甘南玛曲局地暴雨天气过程,中高纬度为两槽一脊环流形势,亚洲中低纬度受副热带高压控制,副热带高压较强,甘南恰好处于副热带高压内部,受西南气流影响,584dagpm线西伸到青藏高原西部地区,青藏高原东部有低涡生成,巴湖槽东移到90°E附近时,槽后冷空气分裂南下进入低涡与低涡相结合形成北槽南涡形势,且低涡一直维持在高原东部,使河西中部到高原中部出现暴雨天气。这种形势下,过程以阵性天气开始,以非阵性天气结束,过程雨强不强,但持续时间较长。本次暴雨过程作为汛期暴雨的特殊典型,应当引起预报员的注意。
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| 关 键 词： | 甘南高原 局地暴雨 低涡切变 |
| 收稿时间： | 2020/3/13 0:00:00 |
| 修稿时间： | 2020/3/13 0:00:00 |
Technical summary of local rainstorm weather process in Maqu of Gannan on July 6,2018 |
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| Abstract: | On July 6,2018, the weather process of local rainstorm in Maqu, Gannan, was characterized by a circulation pattern of two troughs and a ridge in the middle and high latitudes. The middle and low latitudes of Asia are controlled by Horse Latitudes, and the Horse latitudes are strong. Gannan is just inside the Horse latitudes, under the influence of the southwesterly airflow, the 584DAGPM line extends westward to the western part of the qinghai-tibet Plateau, and a low vortex is formed in the eastern part of the qinghai-tibet Plateau. When the Beagh,L. Trough moves eastward to the vicinity of 90 e, the cold air behind the trough splits southward into a low vortex and combines with the low vortex to form a south vortex in the north trough, and the vortex has been maintained in the east of the plateau, so that central Hexi to the central Plateau heavy rain. In this situation, the process starts with intermittent weather and ends with non-intermittent weather. The process rain is not strong, but it lasts for a long time. As a special type of torrential rain in flood season, this rainstorm process should attract the attention of forecasters. |
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| Keywords: | Gannan plateau local rainstorm low Vortex Shear |
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