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中国科学院大学学报 ›› 2016, Vol. 33 ›› Issue (2): 195-203.DOI: 10.7523/j.issn.2095-6134.2016.02.008

• 地球科学 • 上一篇    下一篇

2010—2013年海南岛地闪活动的特征分析

余海1, 张廷龙1, 高燚1, 劳小青1, 韦昌雄1, 范祥鹏2   

  1. 1. 海南省防雷中心, 海口 570203;
    2. 中国气象科学研究院, 北京 100081
  • 收稿日期:2015-06-09 修回日期:2015-10-18 发布日期:2016-03-15
  • 通讯作者: 余海
  • 基金资助:

    国家自然科学基金(41375011)和海南省气象局科技创新项目(HN2013MS17)资助

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

YU Hai1, ZHANG Tinglong1, GAO Yi1, LAO Xiaoqing1, WEI Changxiong1, FAN Xiangpeng2   

  1. 1. Lightning Protection Center of Hainan Province, Haikou 570203, China;
    2. Chinese Academy of Meteorological Sciences, Beijing 100081, China
  • Received:2015-06-09 Revised:2015-10-18 Published:2016-03-15

摘要:

利用海南省地闪定位网获取的4年(2010年1月至2013年12月)地闪定位资料,详细分析海南岛地闪活动的时空分布特征.结果显示,海南岛的地闪活动主要发生在4—10月;呈双峰特征,峰值分别出现于5月和8月,分别约占全年总地闪数的23%和18%;地闪活动在6—7月明显地间歇性减少.从日变化特征来看,地闪在14:00—20:00时段最为频繁.16:00左右达到峰值,而5:00左右有一个较弱的峰值,2个峰值所占比例分别约为11.3%和4.2%.通过对比分析各地区的地闪活动,发现日变化呈现双峰特征的区域主要集中在东、南和西部沿海地区,而中部内陆及靠近琼州海峡的北部沿海地区呈单峰值特征.海南岛中部内陆山区的地闪密度大,沿海地区地闪密度小,并且存在2个地闪密度高值区.

关键词: 地闪, 日变化, 双峰, 地闪密度

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

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