[1]钱卓蕾,杨祥珠,钱月平,等.一次低涡型冰雹天气的环境条件和中尺度特征分析[J].气象研究与应用,2019,40(02):16-20,85.
　Qian Zhuolei,Yang Xiangzhu,Qian Yueping,et al.Environmental Conditions and Mesoscale Characteristics of a Low Vortex Hail Weather[J].Journal of Meteorological Research and Application,2019,40(02):16-20,85.
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一次低涡型冰雹天气的环境条件和中尺度特征分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第40卷
期数:
2019年02期
页码:
16-20,85
栏目:
天气气候
出版日期:
2019-06-30

文章信息/Info

Title:
Environmental Conditions and Mesoscale Characteristics of a Low Vortex Hail Weather
作者:
钱卓蕾1;  杨祥珠1;  钱月平1;  周弘媛2;  季丹丹2
1. 绍兴市气象台, 浙江 绍兴 312000;
2. 柯桥区气象局, 浙江 绍兴 312030
Author(s):
Qian Zhuolei1;  Yang Xiangzhu1;  Qian Yueping1;  Zhou Hongyuan2;  Ji Dandan2
1. Shaoxing Meteorological Observatory, Shaoxing Zhejiang 312000;
2. Keqiao District Meteorological Service, Shaoxing Zhejiang 312030
关键词:
冰雹; 低涡; 中尺度切变线; 干侵入; TBSS
Keywords:
hail; low eddy; mesoscale shear line; dry intrusion; TBSS
分类号:
DH
摘要:
利用常规天气观测、多普勒天气雷达、自动气象站和NCEP1o×1o格点再分析资料，研究在绍兴发生的一次典型低涡型冰雹天气过程环境场和中尺度特征，结果表明：此次冰雹天气出现在西北冷涡的右前方，中高层的干侵入激发了对流不稳定；中尺度辐合线出现在对流风暴的前沿，是由冷池出流与外界暖湿气流交汇而形成，为强对流的发展提供了近地面辐合抬升条件；本次过程先后有三个明显的强单体风暴产生，回波核心区高度均扩展到-20℃层以上，符合弱回波区、悬垂回波和中低层径向辐合的强对流风暴结构，还具有标志大冰雹的三体散射特征（TBSS）。在降雹前最大反射率因子（DBZM）及其所在高度（DBZM HT）的突降和垂直累积液态水含量（VIL）的突增可作为判断降雹的指标。
Abstract:
Based on data from conventional weather observation, Doppler weather radar, and automatic weather station, as well as NCEP 1°×1° reanalysis data, the environmental feld and mesoscale characteristics of a typical low vortex hail weather process in Shaoxing are studied. The results show that the hail weather appears in the right front of the northwest cold eddy, and the dry intrusion of the middle and upper levels stimulates convective instability. Mesoscale convergence line appears at the front of convective storm, which is formed by the convergence of cold pool outflow and warm-humid air flow outside, which provides the condition of near-surface convergence and uplift for the development of strong convection. There are three distinct strong monomer storms in this process and the echo core area all extends above -20℃, which conforms to the structure of strong convective storms in weak echo area, suspended echo and radial convergence in the middle and lower layers. It also has the characteristics of three-body scattering (TBSS), which marks the large hail. The sudden drop of maximum reflectance factor (DBZM) and its height (DBZM HT) as well as the sudden increase of vertically integrated liquid water content (VIL) before hail fall can be used as indicators to judge hail.

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备注/Memo

备注/Memo:
收稿日期:2018-12-10。
基金项目:中国气象局预报员专项CMAYBY2018-031
作者简介:钱卓蕾(1985-),女,硕士,副高级工程师,主要从事天气预报和气候研究。E-mail:qianzl@mail.iap.ac.cn
更新日期/Last Update: 1900-01-01