A Lightning Warning Algorithm Using a EFMs Network and LPS

Junchi, Z, Z. Qingfeng, A. B. Shah, J. Xue, Z. Ye

Abstract


In this work, an Electric Filed Mills (EFMs) network and Lightning Positioning System (LPS) data during June, July and August of 2013&2014, were chosen and processed for lightning warning. We set a region of 10km radius from the EFM sites as the Area Of Concern (AOC), and a second region extending 20km outward, as the Warning Area (WA). Electric field (EF) was smoothed using a running average of a particular number of samples to lessen the effect of rapid vibration. A warning is triggered if one of the following condition is met:

1) Lightning occurs within the WA and at least one of the field values is above a threshold,

2) Both field values are above threshold,

3) Lightning occurs within the AOC.

The result showed that our algorithms performed better than the method using lightning data alone, and that an EF threshold of 4kV/m and a smoothing window of 30sec turned out to be the best combination in most conditions.


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References


Zhenhui, W., Z. Xuhuan, 2009: The Research on Lightning Activities and Forecasting over Jiangsu Province, Thesis of Nanjing University of Information Science &Technology.

Minxue, F.,Z. Junchi,Z. Mingjian et al, 2012: Numeric lightning prediction based on convective indexes at Yangkou Harbor Meteorology, 38 (12):1515-1522.

Xiaofeng, X., G. Hu, L. Xiaonong.et al, 2003: Research of lightning monitoring and forecasting overseas. Beijing. Meteorological Press, 271-301,463-464.

Wilson, 2004: Investigations on lihghtnig discharges and on the electric field of thunderstorm.Phil. Trans. Roy. Soc. Lond. A, Vol. 221 (1921), pp. 73-115.

Aragorn, D., J. Montanya, G. Sola et al., 2009: On the lightning hazard warning using electrostatic field:Analysis of summer thunderstorms in Spain.Journal of Electrostatics, 67:507-512.

Nicholson, J. R., and A. M. Mulvehill, 2000: Expert knowledge techniques applied to the analysis of electric field data. 16th Conf. on Severe local Storms, Kananaskis Park, Alberta, Amer.Meteorol. Soc., pp. J36-J39

Montanya, J., J. Bergas, and B. Hermoso, 2004: Electric field measurements at ground level as a basis of lightning hazard warning. Journal of Electrostatics. 03; 60(2-4):241-246.

Junchi, Z., W. Zhenhui, F. Minxue et al, 2013: Application of AEF data on lightning prediction around Nanjing. Plateau Meteorology, V32 (5): 1470-1477.

Taichang, G., H. G. Ziyang, Z. Peng et al, 2006: Method of amalgamate atmospheric electric field data and radar data. Journal of PLA University of Science and Technology, 7(3):302-306.

Haihua, C., Q. Xiushu, Z. Qilin, et al, 2009: Equivalent electrical discharge structure of thunderstorm and simultaneous observation of multi-station of cloud flashes in Zhongchuan of Gansu. Plateau Meteorology, 28: 808-815.

Hondl, K. D., and M. D. Eilts, 1994: Doppler radar signatures of developing thunderstorms and their potential to indicate the onset of cloud-to-ground lightning .Mon. Wea. Rev., 122, 1818-1836.

Xiaofeng, X., G. Hu, L. Xiaonong et al, 2003: Research of lightning monitoring and forecasting overseas. [M]. Beijing. Meteorological Press, 357-366

Goodman, S. J., D. E. Buechler, P.D. Wright, and W. D. Rust, 1988: Lightning and precipitation history of a microburst-producing storm. Geophys. Res. Lett., 15, 1185-1188.

H. Yuwen, Z. Bingwu, 2004: Lightning Protection of airports and its affiliated devices. Meteorological Technology. 32(4).275-277

Junchi, Z., W. Zhenhui, G. Fengxia et al., 2011: Calibration of the atmospheric electric field mill. Journal of Nanjing University of Information Science and Technology: Natural Science Edition, 3(3): 244-249.


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