| 雷暴云宏观特性对其电过程影响的数值模拟研究 |
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| 引用本文： | 赵鹏国,银燕,周筠珺,肖辉.雷暴云宏观特性对其电过程影响的数值模拟研究[J].气象科学,2015,35(2):126-132. |
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| 作者姓名： | 赵鹏国 银燕 周筠珺 肖辉 |
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| 作者单位： | 南京信息工程大学 大气物理学院 中国气象局气溶胶与云降水重点开放实验室, 南京 210044,南京信息工程大学 大气物理学院 中国气象局气溶胶与云降水重点开放实验室, 南京 210044,成都信息工程学院 大气科学学院, 成都 610225,南京信息工程大学 大气物理学院 中国气象局气溶胶与云降水重点开放实验室, 南京 210044 |
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| 基金项目： | 公益性行业(气象)科研专项(GYHY201106044);江苏省高校优势学科建设工程资助项目(PAPD);江苏省普通高校研究生科研创新计划项目(CXZZ13_0507) |
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| 摘 要： | 利用一维雷暴云起电放电模式,初步模拟了STEPS(夏季雷暴降水与闪电研究计划)一次雷暴个例的一些基本电学特性。模拟的电荷结构为:雷暴云上部为正电荷,下部为负电荷,即符合典型雷暴云的偶极性电场分布特征,放电层电场随时间变化规律呈锯齿状分布。在此基础上,对云底高度和温度垂直递减率进行了敏感性试验,研究这两种因子对雷暴电过程的影响。结果表明:当云底高度降低时,放电高度升高,闪电频数增加,首次放电时间随之提前,即放电过程变强。温度垂直递减率增大,闪电频数降低,首次放电时间随之延后,正负电荷的分布范围减小。
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| 关 键 词： | 雷暴 云底高度 温度垂直递减率 数值模拟 |
| 收稿时间： | 7/8/2013 12:00:00 AM |
| 修稿时间： | 2014/3/25 0:00:00 |
Numerical simulation on influence of macroscopic property of thunderstorm to its electrical activity |
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| ZHAO Pengguo,YIN Yan,ZHOU Yunjun and XIAO Hui.Numerical simulation on influence of macroscopic property of thunderstorm to its electrical activity[J].Scientia Meteorologica Sinica,2015,35(2):126-132. |
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| Authors: | ZHAO Pengguo YIN Yan ZHOU Yunjun and XIAO Hui |
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| Institution: | Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China,College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China and Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China |
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| Abstract: | One-dimensional thunderstorm electrification model was used to simulate the basic electrific characteristics of a thunderstorm case in STEPS. The simulated charge sturcture is the classic dipolar structure:positive charge in the upper part of thunderstorm while negative in the lower part; the evolution law of electrical field in discharge layer becomes sawtooth; the vertical distribution of the positive and negative electrical field locations conforms to the typical electrical field distribution of thuderstorm.Furthermore, a sensitivity test is carried out to analyze the impact of cloud base height and temperature lapse rate on electrical process of thunderstorm. Results show that when the cloud base height decreases, the discharging location goes up and lightning becomes frequent, the first lightning appears sooner. The first lightning has to defer but lightning frequency decreases with the temperature lapse rate increasing, respectively. |
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| Keywords: | Thunderstorm Cloud base height Temperature lapse rate Numerical simulation |
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