| 雷暴电活动对冰雹增长影响的数值模拟研究 |
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| 引用本文： | 张义军,孙安平,言穆弘,郭凤霞,郄秀书,黄美元.雷暴电活动对冰雹增长影响的数值模拟研究[J].地球物理学报,2004,47(1):25-32. |
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| 作者姓名： | 张义军 孙安平 言穆弘 郭凤霞 郄秀书 黄美元 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所,兰州,730000;中国科学院大气物理研究所,北京,100029 |
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| 基金项目： | 中国科学院知识创新重大项目(KZCX1 SW 0 4)，中国科学院寒区旱区环境与工程研究所创新项目(2 10 0 3 7) |
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| 摘 要： | 利用三维强风暴动力-电耦合模式，数值模拟了风暴演变过程 中电活动对冰雹增长及地面降雹的影响. 结果指出，带电冰雹与云内强电场作用使地面降雹 量增加约50HTK]髎HTSS]，雹块直径增大0.7mm，降雹时间滞后约3min. 文中还讨论了强电 场通过对水成物降落速度的调制来影响冰雹微观增长过程，即主要是影响碰并过程和冰雹融 化过程. 电活动使冰雹源、汇总量都减少，但汇总量减少更多，总体效果使冰雹总量增加， 数目减少，冰雹长得更大，更易降落到地面.
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| 关 键 词： | 雷暴数值模式 电荷结构 冰雹增长 微观相变 |
| 文章编号： | 0001-5733(2004)01-0025-08 |
| 收稿时间： | 2002-7-29 |
| 修稿时间： | 2003-6-2 |
Numerical modeling for effects of e lectric activity during thunderstorms upon the growth of hail particles |
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| ZHANG Yi Jun SUN An Ping YAN Mu Hong GUO Feng Xia QIE Xiu Shu HUANG Mei Yuan Institute of Environment and Engineering for Cold and Arid Regions,Chinese Academy of Sciences,Lanzhou ,China Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing ,China.Numerical modeling for effects of e lectric activity during thunderstorms upon the growth of hail particles[J].Chinese Journal of Geophysics,2004,47(1):25-32. |
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| Authors: | ZHANG Yi Jun SUN An Ping YAN Mu Hong GUO Feng Xia QIE Xiu Shu HUANG Mei Yuan Institute of Environment and Engineering for Cold and Arid Regions Chinese Academy of Sciences Lanzhou China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China |
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| Institution: | 1.Institute of Environment and Engineering for Cold and Arid Regions, Chinese A cademy of Sciences, Lanzhou 730000, China;2.Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 , China |
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| Abstract: | Using the 3D dynamics electrification coupled model, we simulate the effect of electric activity on hail growth and shooting on the surface during thunderstorms. The results indicate that the hail with charge and strong electric field make precipitation and diameter of hail particles on the ground increase 50% and 0.7mm , respectively, and the time of hail shooting lag 3 minutes. Effect of microphysical growth process of hail through the strong electric field act on the fall speed of precipitation elements is discussed. Electric action mainly influences collection and melting process of hail. Source and sink of hail decrease, and sink decrease more. So, the total amount of precipitation of hail will increase, and the number of hail particles decreases due to electrical effects. It means that hail particles become bigger and eaier to fall. |
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| Keywords: | Numerical model of thunderstorm Charge structure Growth of hail particles Phase transformation of microphysical process |
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