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Preliminary Analyses on Some Characteristics of Flashes in Northeastern Qinghai-Xizang Plateau

Journal

Plateau Meteorology

Authors

Zhang Rong, Zhang Guangshu, Wang Yanhui, Li Yajun, Wu Bin, Yu Hai, Liu Yanxiu

Year

2013

Volume

32

Issue

3

Pages

519-529

Corresponding Author

Zhang, R

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Keywords

Lightning flash; Starting height; Radiation source

Abstract

Some characteristics of lightning flashes in northeastern Qinghai-Xizang Plateau were analyzed using the three-dimensional lightning locating system, fast and slow antennas. It is found that the duration of flashes is not long, averagely less than 0.5 s. Both the positive and negative cloud-to-ground flashes have long duration of intracloud discharge process before the first return stroke, and it is slightly longer for positive cloud-to-ground flashes. The average number of strokes per negative cloud-to-ground flash is 2.5, and 40% of the negative cloud-to-ground flashes are single-stroke flashes, while all the positive cloud-to-ground flashes are single-stroke flashes. The average starting height of intracloud flashes is higher than the negative cloud-to-ground flashes, and that of the positive cloud-to-ground flashes is lower than the negative cloud-to-ground flashes. Meanwhile, the average number of radiation sources generated by intracloud flashes is the largest, followed by negative cloud-to-ground flashes, and that of positive cloud-to-ground flashes is the smallest.
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