基于雷达和卫星资料对一次冰雹天气过程的中尺度特征分析

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英文篇名：Analysis on the Mesoscale Characteristics of a Hailstorm Case Based on Radar and Satellite Data 作者：倪煜淮 ; 何宏让 ; 陈涛 英文作者：NI Yu-huai;HE Hong-rang;CHEN Tao;Military Ocean Environment Construction Office, Naval Staff Department;College of Meteorology and Oceanography, National University of Defense Technology; 关键词：冰雹 ; 中尺度特征 ; 多普勒天气雷达 ; 卫星资料 英文关键词：hail;;mesoscale features;;Doppler weather radar;;satellite data 中文刊名：HYJS 英文刊名：Journal of Ocean Technology 机构：海军参谋部军事海洋环境建设办公室;国防科学技术大学气象海洋学院; 出版日期：2019-06-15 出版单位：海洋技术学报 年：2019 期：v.38 语种：中文; 页：HYJS201903010 页数：5 CN：03 ISSN：12-1435/P 分类号：62-66

摘要

利用多普勒天气雷达资料以及FY2D逐小时亮温(TBB)资料对2015年4月28日发生在苏皖地区的一次冰雹天气过程进行分析研究,结果表明:(1)利用多普勒天气雷达资料分析可知,此次冰雹天气是由超级单体风暴造成的,这次风暴不但发展非常强烈并且持续时间较长,13:00左右对流风暴产生,16:45左右对流风暴发展成为超级单体,从22:02开始,超级单体逐渐减弱并向东南沿海方向移去。另外,0℃层高度为3.7 km左右,-20℃层高度为7.0 km左右,反射率因子强度达到50 dBZ的区域伸展到了-20℃高度以上,表明有产生大冰雹的可能性。(2)利用FY2D逐小时亮温(TBB)资料分析可得,此次中尺度对流风暴云团产生于13:00,并于24:00减弱入海,而后消失。冷云中心TBB最小值达到-60℃,与实际降雹区域进行比较可得,降雹发生在亮温梯度较大的区域。
        This study has analyzed a case of hailstorm over the Jiangsu-Anhui area on 28 April 2015 by using Doppler Radar data and hourly FY2 D TBB satellite data. The results show that:(1) Based on the Doppler Radar data, it is found that the hailstorm stemmed from a supercell storm with strong intensity and long lifetime. The convective storm generated at 13:00 BJT and grew to a supercell storm until 16:45 BJT. After 22:02 BJT the supercell storm weakened gradually as it moved toward southeast coast. In addition, the 0 ℃ and-20℃ layers were located at the height of 3.7 km and 7.0 km, respectively. The region of reflectivity intensity up to 50 dBZ stretched upward beyond the-20℃ layer, which indicates high occurrence probability of strong hailstorm.(2)Based on hourly FY2 D TBB satellite data, a mesoscale convective storm generated at 13:00 BJT, then weakened and moved to sea at 24:00 BJT. After that it dissipated on the sea. Corresponding the hail region, the minimum TBB reached to-60℃ at the center of cold cloud and the hailstorm tended to generate in the area with larger TBB gradient.

引文

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