Vol.26, NO.3, 2015
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Article Navigation >  Journal of Applied Meteorological Science  > 2015  >  26(3): 354-363
Zhao Wei, Jiang Yujun, Tong Hangwei, et al. Comparative analysis of the cloud-to-ground lightning data between two lightning location systems. J Appl Meteor Sci, 2015, 26(3): 354-363. DOI:  10.11898/1001-7313.20150311.
Citation: Zhao Wei, Jiang Yujun, Tong Hangwei, et al. Comparative analysis of the cloud-to-ground lightning data between two lightning location systems. J Appl Meteor Sci, 2015, 26(3): 354-363. DOI:  10.11898/1001-7313.20150311.
shu

Comparative Analysis of the Cloud-to-ground Lightning Data Between Two Lightning Location Systems

DOI: 10.11898/1001-7313.20150311
  • 1.

    Zhejiang Institute of Meteorological Sciences, Hangzhou 310008

  • 2.

    Zhejiang Electric Power Sciences Institute, Hangzhou 310014

  • Received Date: 2014-09-26
  • Rev Recd Date: 2015-01-26
  • Publish Date: 2015-05-31
    Abstract
  • Comparative analysis of the lightning location data from 2009 to 2013 is conducted by temporal and spatial distribution and detection efficiency, to explore the difference of data collected from two lightning location systems (LLS) of Zhejiang meteorological department and Zhejiang electric power department. Results show that the inter-annual cloud-to-ground (CG) lightning frequency observed by the LLS of Zhejiang meteorological department is stably lower than that observed by the LLS of Zhejiang electric power department. The number of positive CG lightning occupies 3.5% of total CG lightning observed by the LLS of Zhejiang meteorological department, which is also 2% less than that observed by the LLS of Zhejiang electric power department, and both of them are in a reasonable interval. From the viewpoint of spatial distribution, the CG lightning density of two datasets is nearly equal in coastal plain and the Jinhua-Quzhou Basin, but the CG lightning density obtained by Zhejiang electric power department is stably more than that of Zhejiang meteorological department in the other areas except in Chun'an which is located in the border of Hangzhou and Quzhou. It is also found that the occurrence of high CG lightning density region in Chun'an observed by LLS of Zhejiang meteorological department is abnormal. Further analysis of the number of monthly mean thunderstorm days obtained by these two LLSs and manual observation indicates that the monthly mean thunderstorm days observed by the LLS of Zhejiang meteorological department is not more than that of manual observations except in summer, when the monthly mean thunderstorm days observed by LLS of Zhejiang electric power department is almost more than that of manual observations every month. It suggests that the LLS of Zhejiang meteorological department does well in detecting strong thunderstorms while the weaker thunderstorms could be missed. Hence, the LLS detective ability of Zhejiang electric power department is better than that of Zhejiang meteorological department. On the other hand, comparative analysis of detection efficiency is made based on the data of accidents of lightning trip-out on Zhejiang Power Grid. It is concluded that the detection efficiency of the LLS of Zhejiang electric power department is around 6% higher than that of Zhejiang meteorological department.
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  • Fig. 1  Lightning detection stations of two LLSs in Zhejiang Province

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    Fig. 2  Inter-annual variation of the cloud-to-ground (CG) lightning in Zhejiang Province from 2009 to 2013

    (a) the total CG lightning frequency, (b) the percentage of positive CG lightning

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    Fig. 3  Monthly variation of the CG lightning in Zhejiang Province from 2009 to 2013

    (a) the total CG lightning frequency, (b) the percentage of positive CG lightning

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    Fig. 4  Hourly variation of the CG lightning frequency in Zhejiang Province from 2009 to 2013

    (a) the total CG lightning frequency, (b) the percentage of positive CG lightning

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    Fig. 5  Distribution of the average CG lightning density in 2009-2013 based on data from Zhejiang meteorological department

    (a) total CG lightning, (b) positive CG lightning

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    Fig. 6  Distribution of the average CG lightning density in 2009-2013 based on data from Zhejiang electric power department

    (a) total CG lightning, (b) positive CG lightning

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    Fig. 7  Distribution of the average difference of CG lightning density in 2009-2013 between two LLSs

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    Fig. 8  Distribution of the difference of monthly mean thunderstorm days based on LLS from Zhejiang meteorological department and manual observation (unit:d)

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    Fig. 9  Distribution of the difference of monthly mean thunderstorm days based on LLS from Zhejiang electric power department and manual observation(unit:d)

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    Table  1  Comparative analysis of detection efficiency in 2009-2013 between two LLSs in Zhejiang Province

    年份 时间容忍度/min 气象部门LLS探测效率% 电力部门LLS探测效率%
    2009年 2 64.61 71.60
    5 70.37 75.31
    10 72.84 78.60
    2010年 2 62.94 73.78
    5 71.68 77.27
    10 74.83 79.02
    2011年 2 73.74 77.65
    5 77.09 80.45
    10 79.89 81.01
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    • Received : 2014-09-26
    • Accepted : 2015-01-26
    • Published : 2015-05-31
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