| 浙江一次强飑线系统结构特征的数值研究 |
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| 引用本文： | 吴福浪,沈欣,陶俞锋,曹文,张晶晶.浙江一次强飑线系统结构特征的数值研究[J].山东气象,2019,39(3):124-131. |
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| 作者姓名： | 吴福浪 沈欣 陶俞锋 曹文 张晶晶 |
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| 作者单位： | （1.中国民用航空宁波空中交通管理站，浙江 宁波 315154；2.宁波市北仑区气象局，浙江 宁波 315826） |
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| 基金项目： | 宁波市气象科技计划项目（NBQX2018010B） |
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| 摘 要： | 利用常规观测资料、自动气象站资料、NCEP再分析资料和高分辨率WRF模式，对2016年5月5日发生在浙江地区的一次强飑线过程进行模拟研究。结果表明，切变线是影响此次强飑线过程的主要天气系统，飑线发生在充沛的水汽，较弱的对流有效位能和中等强度垂直风切变大气环境下。WRF模式对此次飑线的演变过程和降水分布有较好的模拟能力。通过进一步分析模拟资料发现，雷暴高压和地面冷池是此次飑线风暴的重要边界层特征，边界层辐合线有利于飑线的发展和维持。飑线后侧对流层中层以下的强下沉气流，是造成此次雷暴大风的关键因素。
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| 关 键 词： | 飑线 切变线 冷池 模拟研究 |
| 收稿时间： | 2018/11/7 0:00:00 |
| 修稿时间： | 2019/4/12 0:00:00 |
Numerical study on structural characteristics of a severe squall line in Zhejiang |
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| WU Fulang,SHEN Xin,TAO Yufeng,CAO Wen,ZHANG Jingjing.Numerical study on structural characteristics of a severe squall line in Zhejiang[J].Journal of Shandong Meteorology,2019,39(3):124-131. |
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| Authors: | WU Fulang SHEN Xin TAO Yufeng CAO Wen ZHANG Jingjing |
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| Institution: | (1. Ningbo Air Traffic Management Station of CAAC, Ningbo 315154, China; 2. Beilun Meteorological Bureau of Ningbo, Ningbo 315826, China) |
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| Abstract: | Based on conventional observation data, automatic weather station data, and NCEP reanalysis data, a severe squall line occurred in Zhejiang Province on 5 May 2016 is simulated with high-resolution numerical model WRF. The results show that the shear line is the main weather system inducing the severe squall line process. The squall line occurred under the atmosphere condition of abundant water vapor, weak convective available potential energy, and moderate vertical wind shear. WRF model performs well as simulating the evolution of the squall line and the precipitation distribution. Through further analysis of the simulation data, it is found that thunderstorm high and surface cold pool are important boundary layer characteristics of the squall line, and the boundary layer convergence line is beneficial to the development and maintenance of the squall line. The strong downdraft below the middle troposphere behind the squall line is the key factor causing the thunderstorm gale. |
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| Keywords: | squall line shear line cold pool simulation study |
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