京沪高铁沿线闪电活动的时空分布特征.pdf

第4期
气象水文海洋仪器
No 4
2012年12月
Meteorological, Hydrological and Marine Instruments
Dec.2012
京沪高铁沿线闪电活动的时空分布特征
朱文超',刘艳辉',王芳2,黄伟信,张新甲1
(1.广东省台山市气象局,台山529200;2.广东省开平市气象局,开平529300;3.广东省阳江市气象局,阳江529000)
摘要:利用搭载于卫星上的闪电探测仪所获取的8a闪电资料,对京沪高铁沿线闪电活动的
时空分布进行了研究。结果表明,京沪高铁沿线的闪电活动呈现出明显的季节变化和日变化:
其主要发生在4~9月,其中6~8月为闪电活动最集中的季节,7月为闪电活动的峰值月份,
10月以后闪电活动迅速减少,11~3月,基本没有明显闪电活动;下午和前半夜高铁沿线闪电
活动比较频繁,后半夜、早晨和上午时段闪电活动相对较少。京沪高铁沿线的闪电密度分布可
分为3个区段:从上海虹桥站至江苏南京段为第一区段,其闪电活动相对较少,闪电密度约为
4~8I/km2/yr;从安徽蚌埠至山东济南为第二区段,是京沪高铁沿线闪电活动密度最大的区
城,其闪电密度在10~21f/km2/yr;京津冀区域内的京沪高铁沿线为闪电活动的第三个区
段,是全线闪电活动的次高发区,其闪电密度在6~8f1/km2/yr左右。济南站也是全线闪电
活动最多的区域。
关键词:高铁;闪电;季节变化;日变化;闪电密度
中图分类号:S165+.21文献标识码:A文章编号:1006-009X(2012)04-0046-06
Temporal and spatial distributions of lightning activities along
the Beijing-shanghai high-speed railway
Zhu Wenchao, Liu Yanhui, Wang Fang, Huang Weixin, Zhang Xinjia
Taishan Meteorological Bureau of Guangdong, Taishan 529200;2. Raiping Meteorological Bureau of Guangdong
Kaiping 529300; 3. Yangjiang Meteorological Bureau of Guangdong, Yangjiang 529000)
Abstract: The temporal and spatial distributions of lightning activities along the Beijing-shanghai high-
speed railway are analyzed by using eight-year-data from satellite-based lightning detector. The result
indicates that the lightning activity along the railway has obvious seasonal and diurnal variations. The
lightning activities mainly occur from April to September and centralized from June to Auguest and the
most active month is always in July, while it disappears in October and there is almost no flash from
November to March. In the afternoon and from dusk till midnight, lightning activity is frequent and it
is relatively less after the midnight and morning. According to the value of the flash density, the
railway could be divided into three sections. The first section is from Hongqiao station to Nanjing
station. There are relatively less lightning activities in this section and the value of the flash density is
48 fl/km/yr. The second one is from Bangbu station to Jinan station, in which the value is 10-21
fl/km /yr and it has the most flash. The third section is in Beijing, Tianjin and He
ebel where the value
is 6-8 fl/km/yr. There are relatively more lightning activities in this section
Key words: high-speed railway; lightning; seasonal variation; diurnal variation: flash density
收稿日期:2012-04-09.
作者筒介:朱文超(198-),男,大学,助理工程师,从事雷电防护监测、检测方面工作.