<
doi:  10.12013/qxyjzyj2019-047
输电线路雷击前近距离气象要素变化特征分析——以石家庄市为例

Analysis on variation characteristics of meteorological elements in close range before lightning strike on power transmission Line: Taking Shijiazhuang City as an example
摘要点击 96  全文点击 86  投稿时间:2019-07-03  修订日期:2019-09-12
查看HTML全文  查看全文  查看/发表评论  下载PDF阅读器
基金:  国家自然科学基金项目(编号:41875085).
中文关键词:  雷击,输电线路,气象要素,变化
英文关键词:  strike  lightning  meteorological elements  variation
        
作者中文名作者英文名单位
张翠华Zhang Cuihua石家庄市气象局, 河北 石家庄 050081
张文煜Zhang Wenyu兰州大学 大气科学学院, 甘肃 兰州 730000
张艳品Zhang Yanpin石家庄市气象局, 河北 石家庄 050081
引用:张翠华,张文煜,张艳品.2019,输电线路雷击前近距离气象要素变化特征分析——以石家庄市为例[J].气象与减灾研究,42(4):295-300
中文摘要:
      利用石家庄市1990—2017年输电线路雷击事故资料,结合输电线路雷击发生前近距离的气象观测数据,统计分析了输电线路雷击发生前的雷暴方位、风、气压、相对湿度、气温和地温的变化特征。结果表明:输电线路雷击发生前12 h内的雷暴方位走向大多呈现从西北或偏西方位经过天顶至东南或偏东方位,或终止于天顶。输电线路雷击前6 h内气象要素的小时变化,地面最多风向由东南经东北向西北旋转,最大风速随输电线路雷击发生的临近呈逐时明显增大趋势;平均相对湿度随输电线路雷击发生的临近呈逐时明显上升趋势;平均气温和平均地面温度随输电线路雷击发生的临近呈逐时明显下降趋势;平均本站气压随输电线路雷击发生的临近变化趋势不明显。输电线路雷击前6 h、3 h和1 h气象要素波动幅度的年变化,前1 h气温和地面温度波动幅度呈逐年明显下降趋势,其他时段气象要素波动幅度变化趋势不明显。输电线路雷击发生前地面最多风向逆时针旋转,最大风速和空气相对湿度明显上升,气温和地面温度明显下降,但气压变化不明显;输电线路雷击发生次数分别与输电线路雷击前1 h气温和地面温度波动幅度呈现完全明显负相关。
Abstract:
      Based on the detailed information of lightning strikes on power transmission line and meteorological elements in close range before lightning strike from 1990 to 2017 in Shijiazhuang, the variation characteristics of meteorological elements before lightning strike including thunderstorm azimuth, timing wind, pressure, air humidity, air temperature and ground temperature were analyzed by using statistical methods. The results showed that the dominant thunderstorm direction of lightning strike in 12 hours was from northwest or west via zenith to southeast or east, or ending at the zenith mostly. As for the variations of hourly meteorological element before lightning strike in 6 hours, surface dominant wind direction was from southeast to northwest via northeast. The maximum wind velocity and average relative air humidity presented significant increase trends. The mean air temperature and mean ground temperature exhibited significant decrease trends, while no obvious trend can be found for the mean pressure of local station as lightning strike approaching. As for the annual variations of meteorological element before lightning strike in 6, 3 and 1 hours, the amplitude of air temperature and ground temperature before lightning strike in 1 hour presented significant decrease trends, but no obvious trend can be found for other meteorological element at other times. Surface dominant wind direction whirled counter clockwise. The maximum wind velocity and relative air humidity increased significantly, but the air temperature and ground temperature decreased obviously, and no obvious variations can be observed for the air pressure. The number of lightning strikes showed negative correlate relationship with the fluctuation amplitude of air temperature and ground temperature before the lightning strike in 1 hour.
主办单位:江西省气象学会 单位地址:南昌市高新开发区艾溪湖二路323号
联系电话: (0791)82713175传真:0791-82713175 邮编:330096 Email:qxyjzyj@163.com
本系统由北京勤云科技发展有限公司设计