| Numerical Study on a Severe Downburst-Producing Thunderstorm on 23 August 2001 in Beijing |
| |
| 作者姓名： | 付丹红 郭学良 |
| |
| 作者单位： | [1]Laboratory of Cloud-Precipitation Physics and Severe Storms （LACS）, Institute of Atmospheric Physics,Chinese Academy of Sciences, Beijing 100029 [2]Graduate University of the Chinese Academy of Sciences, Beijing 100039 [3]不详, Beijing 100039 |
| |
| 基金项目： | 国家自然科学基金，The Chinese Academy of Sciences Innovation Foundation |
| |
| 摘 要： | A thunderstorm that produced severe wind, heavy rain and hail on 23 August 2001 in Beijing was studied by a three-dimensional cloud model including hail-bin microphysics. This model can provide important information for hail size at the surface, which is not available in hail parameterization cloud models. The results shows that the cloud model, using hail-bin microphysics, could reasonably reflect the storm＇s characteristics such as life cycle, rainfall distribution and the diameter of the hailstones and also can reproduce developing processes of downbursts, where they can then be compared with the observed features of the storm. The downburst formation mechanism was investigated based on the cloud microphysics of the simulated storm and it was found that the downburst was primarily produced by hail-loading and enhanced by cooling processes that were due to hail melting and rain evaporation. The loading and melting of hail played crucial roles in the formation of downbursts within the storm.
|
| 关 键 词： | 北京 2001年8月23日 雷暴 强下击暴流 冰雹仓微物理学 数字研究 |
| 收稿时间： | 2006-02-24 |
| 修稿时间： | 2006-05-15 |
Numerical study on a severe downburst-producing thunderstorm on 23 August 2001 in Beijing |
| |
| Fu?Danhong,Guo?Xueliang.Numerical Study on a Severe Downburst-Producing Thunderstorm on 23 August 2001 in Beijing[J].Advances in Atmospheric Sciences,2007,24(2):227-238. |
| |
| Authors: | Fu Danhong Guo Xueliang |
| |
| Abstract: | A thunderstorm that produced severe wind, heavy rain and hail on 23 August 2001 in Beijing was studied by a three-dimensional cloud model including hail-bin microphysics. This model can provide important information for hail size at the surface, which is not available in hail parameterization cloud models. The results shows that the cloud model, using hail-bin microphysics, could reasonably reflect the storm's characteristics such as life cycle, rainfall distribution and the diameter of the hailstones and also can reproduce developing processes of downbursts, where they can then be compared with the observed features of the storm. The downburst formation mechanism was investigated based on the cloud microphysics of the simulated storm and it was found that the downburst was primarily produced by hail-loading and enhanced by cooling processes that were due to hail melting and rain evaporation. The loading and melting of hail played crucial roles in the formation of downbursts within the storm. |
| |
| Keywords: | hail-bin microphysics severe storm downburst |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《大气科学进展》浏览原始摘要信息 |
| 点击此处可从《大气科学进展》下载免费的PDF全文 |
