Based on the special landscape and regional characteristics,the lightning location information from 1999 to 2008 and conventional observation data from 1971 to 2000 provided by electricity departments in Hebei Provinc...Based on the special landscape and regional characteristics,the lightning location information from 1999 to 2008 and conventional observation data from 1971 to 2000 provided by electricity departments in Hebei Province were applied to analyze spatial and temporal distribution of lightning.With lighting disaster data since 2000 provided by meteorological department,and records from civil affair,statistics,insurance,and other departments,the lighting disaster distribution of Hebei Province was studied from aspects of economic and people losses,and some countermeasures for several lightning disasters industries were put forward.展开更多
基金Supported by Scientific Research Special Fund for Public Welfare Industry(Meteorology)[GYHY200806014]
文摘Based on the special landscape and regional characteristics,the lightning location information from 1999 to 2008 and conventional observation data from 1971 to 2000 provided by electricity departments in Hebei Province were applied to analyze spatial and temporal distribution of lightning.With lighting disaster data since 2000 provided by meteorological department,and records from civil affair,statistics,insurance,and other departments,the lighting disaster distribution of Hebei Province was studied from aspects of economic and people losses,and some countermeasures for several lightning disasters industries were put forward.
文摘利用1960—2013年河北省11个气象站常规观测资料、1980—2013年NCEP 2.5°×2.5°再分析资料等,采用线性趋势、Morlet小波分析等方法对河北省及各地市雾、霾天气的演变特征和高空环流形势进行分析。结果表明:(1)1960—2013年11个地市中衡水市年平均雾日数最多,张家口市最少;石家庄市年平均霾日数最多,承德市最少,衡水霾日数呈下降趋势外,其他10个地市均呈上升趋势;(2)1960—2013年全省年平均雾日数呈下降趋势,霾日数呈上升趋势,且霾日数上升比雾日数下降趋势更明显;(3)河北省及各地市年平均雾日数周期性特征明显,基本都存在14 a的主振荡周期。雾、霾多发月华北上空500 h Pa的纬向环流较强,环流形势利于雾、霾天气的形成和维持;雾日数与西风指数成显著的正相关关系。