Preliminary analysis of cloud-to-ground flashes in Hainan Island from 2010 to 2013

doi:10.7523/j.issn.2095-6134.2016.02.008

Abstract

Abstract:

Based on the four years' data (2010-2013) of cloud-to-ground (CG) flashes detected by the VLF lightning locating networks in Hainan province, the temporal and spatial variation characteristics of CG flash activities were analyzed in detail. The results indicated that CG flashes mostly occurred between April and October and two peaks of CG activity appeared in May (23%) and August (18%). The lightning activities showed intermittent decrease in June-July. The diurnal variation of CG flashes showed that the CG flashes more frequently occurred between 14:00 and 20:00 and there were two peaks appearing at 16:00 (about 11.3%) and 5:00(about 4.2%), respectively. By analyzing CG flash activities in different regions, we found that the diurnal variation of CG activities usually presented double peaks in the coastal regions, except the northern coastal area near Qiongzhou strait and the inland regions. The largest CG flash density occurred in the inland mountainous regions, and the flash density showed a decreasing trend from inland to coasts. In addition, there were two maximum values of the CG flash density.

Key words: CG flashes, diurnal variation, double peaks, flash density

CLC Number:

P446

YU Hai, ZHANG Tinglong, GAO Yi, LAO Xiaoqing, WEI Changxiong, FAN Xiangpeng. Preliminary analysis of cloud-to-ground flashes in Hainan Island from 2010 to 2013[J]. , 2016, 33(2): 195-203.

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