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中国农学通报

中国农学通报 ›› 2018, Vol. 34 ›› Issue (20): 118-125.doi: 10.11924/j.issn.1000-6850.casb18030028

所属专题： 农业气象

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

北京市闪电定位数据与人工观测雷暴日关系研究

霍沛东,马海鹏,李京校,李如箭,朴文   

  1. 北京市气象灾害防御中心,北京市气象灾害防御中心,北京市气象灾害防御中心,北京市气象灾害防御中心,北京市气象灾害防御中心
  • 收稿日期:2018-03-06 修回日期:2018-03-16 接受日期:2018-03-23 出版日期:2018-07-13 发布日期:2018-07-13
  • 通讯作者: 霍沛东
  • 基金资助:
    北京市气象局科技项目“北京市闪电定位数据和人工观测雷暴日数的相关性研究”(BMBKJ201501005)。

The Relationship of Lightning Location System Data and Artificial Observation Thunderstorm Days in Beijing

  • Received:2018-03-06 Revised:2018-03-16 Accepted:2018-03-23 Online:2018-07-13 Published:2018-07-13

摘要： [目的]针对北京地区首次开展闪电定位系统(Lightning Location System,LLS)数据与人工观测雷暴日的关系研究，解决北京地区人工观测雷暴日停止后雷暴日数据无法获取的问题。[方法]选取北京地区2008-2011年LLS监测数据，以20个人工观测站为圆心，1 km为间距，统计各站周围半径(r)1~20 km圆形区域内LLS监测的闪电次数及雷电日数。采用直接替代法、地闪密度法和二元法计算雷电日，分别从全市年平均雷电日及各站年平均雷电日两方面与人工观测雷暴日数进行比较，寻求最适合北京地区的LLS资料转换为雷暴日数方法，建立转换关系。[结果]结果表明：当r =13 km时，LLS监测年平均雷电日数与人工观测年平均雷暴日数最为接近。通过直接替代法、地闪密度法和二元法计算所得的结果中，二元法效果最好，直接替代法次之，地闪密度法效果最差。对于单个观测站，各站周围的地闪密度与人工观测雷暴日数没有统一的函数关系，采用直接替代法得到的各站等效观测半径来确定各站的雷暴日数较为准确。[结论]该结果表明了北京地区LLS数据与人工观测雷暴日之间的关系，使雷暴日可作为基础数据继续应用于北京地区的雷电防护和研究中。

关键词: ABA, ABA, 侧根, 根系形态建成

Abstract: To solve the problem that the number of thunderstorm days cannot be obtained after the artificial observation stopped in Beijing, the relationship between the data of lightning location system (LLS) and the artificial observation thunderstorm days in Beijing is studied. The LLS monitoring data around 20 artificial observation stations in Beijing from 2008 to 2011 were selected in this study. Taking each station as the center, 1km for the distance, the numbers of lightning and lightning days were calculated from the LLS monitoring data around each station with the radius (r) from 1 to 20 km. To find the optimal method for converting LLS data into the thunderstorm days, the lightning days were calculated by three methods and compared with the numbers of artificial observation thunderstorm days from two aspects, respectively. The three calculation methods were the direct substitution method, the ground flash density method and the binary method. The two comparison aspects were the annual mean lightning days of 20 stations and the annual mean lightning days of each station. The results showed that the number of the annual mean lightning days in LLS monitoring with r=13 km was the closest to the number of the annual mean thunderstorm days. For the results obtained by the three methods, the binary method was the best, followed by the direct substitution method, and the ground flash density method was the worst. For the single observation station, there was no unified function relationship between the ground flash density around each station and the number of artificial observation thunderstorm days. However, the number of thunderstorm days for each station was accurately determined by using the equivalent observation radius for each station from the direct substitution method. The results show the relationship between the LLS data and the days of artificial observation thunderstorm in Beijing, which enables the thunderstorm days to be continually used as the basic data in the lightning protection and research in Beijing area.