主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2014, Vol. 30 ›› Issue (1): 69-74.doi:

• 论　文 • 上一篇    下一篇

邵阳地区闪电活动特征及其与降水的关系

周明薇1 周四清2 彭双姿3 尹中海4 肖稳安 5,6   

  1. 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
  • 出版日期:2014-02-28 发布日期:2014-02-28

Characteristics of lightning and it relations with precipitation in Shaoyang region

ZHOU Ming-wei1  ZHOU Si-qing2  PENG Shuang-zi3  YIN Zhong-hai4  XIAO Wen-an 5,6   

  1. 1.Changde Meteorological Service, Changde 415000, China; 2.Dongkou Meteorological Service, Dongkou 422300, China; 3.Shaoyang Meteorological Service, Shaoyang 422000, China; 4. Hunan 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
  • Online:2014-02-28 Published:2014-02-28

PDF (PC)

304

被引次数

2

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。

关键词: 负地闪, 地闪频数, 地闪密度

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 relationship 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.

Key words: Negative cloud-ground lightning, Cloud-ground lightning frequency, Cloud-ground lightning density