| 四川盆地一次阵风锋触发的局地强对流天气雷达特征分析 |
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| 引用本文： | 王晓娟,邓荣耀,陈三春.四川盆地一次阵风锋触发的局地强对流天气雷达特征分析[J].高原山地气象研究,2018,38(2):62-66. |
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| 作者姓名： | 王晓娟 邓荣耀 陈三春 |
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| 作者单位： | 四川省宜宾市气象台, 宜宾 644007 |
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| 基金项目： | 中国气象局预报员专项(CMAYBY2018-065) |
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| 摘 要： | 应用自动气象站资料和多普勒雷达观测资料，对盆地南部一次阵风锋引起的局地强对流天气进行分析，结果表明:阵风锋是对流风暴产生的下沉气流到达地面时产生强烈辐散，与低层暖湿空气交汇产生的剧烈天气现象；阵风锋在多普勒雷达上表现为一条狭窄弧线，回波强度弱，速度图上有辐合，阵风锋与强雷暴的发生、发展和维持有促进作用；阵风锋过境会引起气象要素陡变，阵风锋经过的地方，强雷暴的产生地与地面风场辐合线的位置和温度槽线的位置有很好的对应关系，对短临预报预警的提前发布有较强的指示意义。
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| 关 键 词： | 阵风锋 窄带回波 辐合线 短临预报 |
| 收稿时间： | 2018-04-08 |
Radar Characteristics Analysis of Local Strong Convective Weather Triggered by a Gust Front in Sichuan Basin |
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| Affiliation: | Yibin Meteorological Observatory, Yibin 644007, China |
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| Abstract: | Based on the data from the automatic weather station and Doppler radar, the local severe convective weather caused by a gust front in the southern part of the basin is analyzed.It is shown that the gust front is a severe weather phenomenon caused by the strong divergence of the downdraft generated by the convective storm when it reaches the ground and the intersection of the warm and humid air at the lower level.The gust front is a narrow arc on the Doppler radar, the echo intensity is weak, the velocity map has convergence, the gust front and the strong thunderstorm have the promotion effect, the development and the maintenance.The crossing of gust front will cause the abrupt change of meteorological elements. There is a good correspondence between the location of the strong thunderstorm and the position of the convergence line of the ground wind field and the location of the temperature slot line, and it has a strong directive significance for the early release of the short and impending prediction and early warning. |
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