| 2015年5月山西中南部一次飑线天气过程分析 |
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| 引用本文： | 赵海英,董文晓,赵 珺,申李文,赵建峰.2015年5月山西中南部一次飑线天气过程分析[J].中国农学通报,2016,32(11):127-132. |
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| 作者姓名： | 赵海英 董文晓 赵 珺 申李文 赵建峰 |
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| 作者单位： | 山西省气象台,山西省气象台,晋城市气象局,山西省气象台,山西省气象台 |
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| 基金项目： | 中国气象局预报员专项“2014 年不同季节区域性暴雨过程对比分析”(CMAYBY2015-008)；山西省气象局领军人才项目“军地监测资料在重大气象保障服务中的应用技术研究”(SXKLJTQ201510001)。 |
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| 摘 要： | 为了研究飑线带来的强对流天气发生发展的特点,为日后此类天气的预报工作提取可利用的预报指标,利用稠密气象观测资料,对山西中南部一次飑线造成的雷雨大风和冰雹天气过程进行了分析。结果发现：这次飑线过程发生在高空冷涡与地面倒槽相配合的不稳定大气环境下。飑线的发生、发展与地面中尺度辐合线密切相关,强对流天气区有地面中尺度辐合线配合,并表现出了气压陡增、温度骤降、风速变大的飑线天气特征,垂直结构表现为高层冷平流叠加在低层暖平流之上,垂直风切变很大,湿度层结下湿上干,低层湿空气很薄,中高层干燥,这种层结特征决定了这次飑线过程以雷雨大风和冰雹天气为主。在雷达拼图上也表现出了明显的飑线弓形回波特征。
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| 关 键 词： | 甜玉米 甜玉米 热胁迫 SSR标记开发 多态性 |
| 收稿时间： | 2016/1/12 0:00:00 |
| 修稿时间： | 2016/2/29 0:00:00 |
A Squall Line Process in South-central Shanxi Province in May 2015 |
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| Abstract: | In order to study the feature of severe convective weather caused by squall line and extract available indicators of this kind of weather for future forecast, using dense meteorological observational data, a thunderstorm gale and hail weather process caused by squall line in south-central Shanxi province is analyzed. The result show that the squall line process occurs at an unstable atmospheric environment caused by the combination of upper cold vortex and surface inverted trough. The occurrence and development of squall line is closely related to the surface mesoscale convergence line. Severe convective weather area is accompanied by surface mesoscale convergence lines or centers. The typical characteristics of squall line weather appeared in severe convective weather stations, which show that pressure soar, temperature drop and wind speed surge. The vertical structure of severe convective area is characterized by upper cold advection superimposed on the low-level warm advection and strong vertical wind shear. The humidity stratification show that the wet low layer is matched with dry high layer and the low wet layer is very thin. This type of stratification determines that thunderstorm gale and hail is the main weather in this squall line process. Also, there is obvious squall line bow echo in radar mosaic. |
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| Keywords: | squall line process severe convective weather surface mesoscale convergence lines vertical structure |
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