| 邵阳地区闪电活动特征及其与降水的关系 |
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| 引用本文： | 周明薇,周四清,彭双姿,尹中海,肖稳安.邵阳地区闪电活动特征及其与降水的关系[J].气象与环境学报,2014,30(1):69-74. |
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| 作者姓名： | 周明薇 周四清 彭双姿 尹中海 肖稳安 |
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| 作者单位： | 1. 常德市气象局，湖南 常德 415000；2.洞口县气象局，湖南 洞口 422300；3. 邵阳市气象局，湖南 邵阳 422000；4. 湖南省气象台，湖南 长沙410000；5. 南京信息工程大学大气物理学院，江苏 南京 210044；6. 南京信息工程大学大气物理学院气象灾害省部共建教育部重点实验室，江苏 南京210044 |
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| 基金项目： | 中国气象局2011年气象关键技术集成与应用项目（CMAG2011M36）和中国气象局行业（气象）专项“华南持续性暴雨中尺度特征诊断分析和预报技术研究”（GYHY201106003）共同资助. |
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| 摘 要： | 利用闪电定位资料和常规观测站24 h的降水资料，对邵阳地区2008-2010年的闪电特征进行分析，并进一步探讨了邵阳地区闪电与降水的关系。结果表明：邵阳地区闪电多以负地闪为主，地闪频次的最大值中心位于东北部，呈东北-西南减少的趋势；地闪频次存在明显的日变化特征，闪电集中发生在13-19时；有闪电时，降水量不超过1 mm和10 mm的降水个例分别为29.63 %，76.30%；无闪电时，其值分别为69.44 %，96.30 %；超过20 mm的降水大多伴随有闪电，无闪电时发生概率极小；地闪频次与闪电对流降水的拟合系数优于其与所有降水的拟合系数，且随着统计尺度的增大，地闪与闪电对流降水的相关性变强。
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| 关 键 词： | 负地闪 地闪频数 地闪密度 |
Characteristics of lightning and its relations with precipitation in Shaoyang region |
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| ZHOU Ming-wei,ZHOU Si-qing,PENG Shuang-zi,YIN Zhong-hai,XIAO Wen-an.Characteristics of lightning and its relations with precipitation in Shaoyang region[J].Journal of Meteorology and Environment,2014,30(1):69-74. |
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| Authors: | ZHOU Ming-wei ZHOU Si-qing PENG Shuang-zi YIN Zhong-hai XIAO Wen-an |
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| Institution: | 1. Changde Meteorological Service, Changde 415000, China; 2. Dongkou Meteorological Service, Dongkou 422300, China; 3. Shaoyang Meteorological Service, Shaoyang 422000, China; 4. Hu＇nan Meteorological Observatory, Changsha 410000, China; 5. School of Atmospherics Physics, Nanjing University of Information Science ＆ Technology, Nanjing 210044, China; 6. Key Laboratory of Meteorological Disaster of Ministry of Education, College of Atmospheric Physics, Nanjing University of Information Science ＆ Technology, Nanjing 210044, China ) |
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| Abstract: | Based on the data from a cloud-ground lightning location system and 24 hours precipitation data from the weather stations ,the characteristics of lightning in Shaoyang region from 2008 to 2010 were analyzed and its rela- tionship with precipitation was discussed. The results show that most lightning is negative and its large value center is located in the northeast, while its frequency decreases from northeast to southwest. The frequency of cloud-to- ground （CG） lightning has an obvious diurnal change, and the highest frequency usually occurs from 13：00 to 19：00. The cases under 1 mm and 10 mm accumulated precipitation account for 29. 63% and 76. 30% respectively with lightning ,while corresponding values are 69. 44% and 96. 30% without lightning. The rainfall events that 24 hours accumulated precipitation is over 20 mm usually occur with lightning, and it is seldom without lightning. The correlation coefficients between CG lightning frequency and convective rainfall are greater than that between CG lightning frequency and the total precipitation, and the former becomes stronger with the increasing of the time- scale. |
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| Keywords: | Negative cloud-ground lightning Cloud-ground lightning frequency Cloud-ground lightning density |
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