| 一次强单体雹暴结构和成雹机制的数值模拟研究 |
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| 引用本文： | 程相坤,杨慧玲,李红斌,肖辉,蔡冬梅.一次强单体雹暴结构和成雹机制的数值模拟研究[J].高原气象,2012,31(3):836-846. |
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| 作者姓名： | 程相坤 杨慧玲 李红斌 肖辉 蔡冬梅 |
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| 作者单位： | 1. 大连市气象局,辽宁大连,116001
2. 中国科学院大气物理研究所云降水物理与强风暴实验室,北京,100029 |
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| 基金项目： | 国家自然科学基金项目，大连市科技局科技计划项目 |
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| 摘 要： | 利用NCEP再分析资料、L-波段雷达探空资料,分析了2010年6月15日发生在大连地区的强雹暴过程的环流形势和垂直气流结构;并利用中国科学院大气物理研究所的完全弹性三维雹云数值模式,模拟了该过程的雷达回波结构特征、含水量场等宏微观物理量的分布及其演变,着重分析了冰雹云的成雹机制。结果表明,模式较成功地模拟出了雹云回波的强度和发展高度,并模拟出了回波墙、弱回波区及悬垂回波等一系列强冰雹云的回波结构特征。该雹云的冰雹主要由冻滴转化形成,冰雹的增大主要依赖于与云滴、雨滴的撞冻过程,即冰雹主要是通过撞冻过冷水长大;冰雹与霰粒和雪花的碰并过程比较强,而与冰晶的碰并增长量很小。
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| 关 键 词： | 强单体雹暴 数值模拟 悬挂回波 成雹机制 |
Numerical Simulation Study on Hail Formation Mechanism and Structure of a Strong Supercell Convective Storm |
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| CHENG Xiang-kun,YANG Hui-ling,LI Hong-bin,XIAO Hui,CAI Dong-mei.Numerical Simulation Study on Hail Formation Mechanism and Structure of a Strong Supercell Convective Storm[J].Plateau Meteorology,2012,31(3):836-846. |
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| Authors: | CHENG Xiang-kun YANG Hui-ling LI Hong-bin XIAO Hui CAI Dong-mei |
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| Institution: | 1 (1.Dalian Meteorology Bureau,Dalian 116001,China; 2.Laboratory of Cloud-Precipitation Physics and Severe Storms,Institute of Atmospheric Physics, Chinese Academy of Sciences,Beijing 100029,China) |
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| Abstract: | The circulation situation and vertical air flow structure of a strong convective storm in Dalian on 15 June,2010 was analyzed using the sounding data from GTS1 digital radiosonde,conventional observation data,and NCEP/NCAR 1°×1° reanalysis data.And the strong convective storm is simulated by the fully elastic three-dimensional convective storm model(IAP-CSM3D) that developed by the Institute of Atmospheric Physics(IAP),the Chinese Academy of Sciences.The initial field of the model is the observational data,combining the observational data by the Doppler weather radar,the distribution and evolution of macro-physical as well as micro-physical variations such as wind field structure,radar echo structure,overhang echo,bound weak echo region,strong echo wall and water content,et al.in the hailstone are analyzed.Some typical features of supercell structure are revealed on the basis of the analysis.The formation mechanism of hailstone in the storm was analyzed too.The results show that the auto-conversion of frozen drops is the main source of the hailstone in the strong convective storm process.Hailstones mainly depend on the processes of collecting supercooled water(CLch,CLrh) to grow.The process of hail particles collecting with graupel and snowflake is relatively stronger,while the growth process of hail particles collected with ice crystal is very small. |
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| Keywords: | Strong supercell storm Numerical simulation Overhang echo Mechanism of hailstoneformation |
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