Comparative Analysis of SAFIR and ADTD Lightning Location Data over Beijing and Its Circumjacent Regions

  • LI Jingxiao ,
  • GUO Fengxia ,
  • HU Haibo ,
  • LI Rujian ,
  • QIAN Muhui ,
  • XIAO Wenan
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  • Beijing Meteorological Disaster Prevention Center, Beijing 100089, China;Key Laboratory of Meteorological Disaster, Ministry of Education(KLME)/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China;Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China

Received date: 2016-10-08

  Online published: 2017-08-28

Abstract

The data of lightning location system is very important in scientific research and business of lightning protection. The characteristics of temporal, spatial and current distribution could be analyzed from the lightning location system and the characteristics could provide some guidance for the rational design of lightning protection project or lightning physics research.However, there are some differences in detection results between the different systems. The detection performances of the lightning location system are well known by comparing and analyzing the results of the different systems. Therefore the observation data of SAFIR system and ADTD system were compared and analyzed over Beijing and its surrounding areas in 2008. The results showed:The frequency of positive and negative CG (Cloud-to-Ground) lightning detected by SAFIR were both less than those detected by ADTD. However, the characteristics of the daily variation, the monthly variation of positive CG lightning and negative CG lightning were essentially similar respectively. The percentage of positive CG lightning frequency accounting for total lightning detected by SAFIR was higher than that detected by ADTD. The high value area of CG lightning of the SAFIR system was mainly distributed in the south, while the ADTD system's was mainly distributed in the north. The distributions of low value area of CG lightning were basically the same. The positive and negative CG lightning current intensity of SAFIR system was less than that of ADTD system. More concretely, the positive CG lightning current intensity of the former was 25 kA less than the latter, and meanwhile the negative CG lightning of the former was 10 kA less than the latter. The diurnal variation and the monthly variation characteristics of the current intensity of the two systems were basically similar. The cumulative probability distribution of negative CG lightning current by ADTD was consistent with that of the IEEE working group. The spatial distribution of current intensity of the positive CG lightning in the SAFIR system was relatively concentrated, however the ADTD system's was relatively dispersed. On the whole, the temporal distribution characteristics of the lightning detected by the two systems were similar, but the characteristics of the frequency and intensity distribution were different. The different reasons still need further study. Combining with the relevant literature, the different reasons might be related to the CG lightning waveform criterion and threshold selection, time resolution of location system itself, the installation location environment, the maintenance and calibration of the system and so on. Finally, it was preliminarily concluded that the performance of detecting CG lightning from ADTD system was relatively reliable over Beijing and its surrounding areas in 2008.

Cite this article

LI Jingxiao , GUO Fengxia , HU Haibo , LI Rujian , QIAN Muhui , XIAO Wenan . Comparative Analysis of SAFIR and ADTD Lightning Location Data over Beijing and Its Circumjacent Regions[J]. Plateau Meteorology, 2017 , 36(4) : 1115 -1126 . DOI: 10.7522/j.issn.1000-0534.2016.00132

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