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河北廊坊雷暴大风的气候特征
引用本文:周贺玲,张绍恢,杨艳.河北廊坊雷暴大风的气候特征[J].甘肃气象,2014(4):588-592.
作者姓名:周贺玲  张绍恢  杨艳
作者单位:河北廊坊市气象局,河北廊坊065000
基金项目:河北省气象局科研开发项目(11KY32)资助
摘    要:利用1970~2012年廊坊地区9个气象站地面雷暴大风观测资料,采用趋势分析、滑动t检验、小波分析和最大熵谱分析等统计方法,系统分析了该地区雷暴大风天气的时空特征及变化趋势和变化周期。结果表明:廊坊地区的雷暴大风局地性强,43 a间只出现了一次全区性的雷暴大风天气过程,雷暴大风多以单站出现为主。雷暴大风的地域性特征明显,中部的廊坊市及南部的文安、大城站较易出现,而北部发生概率较低。雷暴大风的日、月及年变化特征明显。雷暴与大风主要发生在午后至前半夜,大风发生时间一般落后于雷暴,1 h内的雷暴与10 min以内的大风发生概率最高;雷暴大风3~10月都可出现,主要集中在夏季,发生概率为73.3%;近43 a来,年均雷暴大风日数整体呈现减少趋势,且中部的站点减少趋势最显著,1994年为雷暴大风的显著突变年,其显著变化周期为3.23a。雷暴大风多为"湿"型。

关 键 词:雷暴大风  气候特征  变化趋势

Climatic Characteristics of Thunderstorm Gale in Langfang of Hebei Province
ZHOU Heling,ZHANG Shaohui,YANG Yan.Climatic Characteristics of Thunderstorm Gale in Langfang of Hebei Province[J].Gansu Meteorology,2014(4):588-592.
Authors:ZHOU Heling  ZHANG Shaohui  YANG Yan
Institution:( Langfang Meteorological Bureau of Heibei Province ,Langfang 065000, China)
Abstract:Based on the observational data of 9 meteorological stations in Langfang of Heibei Province during 1970-2012,the temporal and spatial characteristics,change trends and cycle of thunderstorm gale were analyzed by using trend analysis,moving t test,wavelet analysis and maximum entropy spectrum.Results showed that thunderstorm gale in Langfang mostly occurred at one station,while the whole regional thunderstorm gale appeared only once.Thus,the thunderstorm gales had strong local feature.The regional characteristic of thunderstorm gale was obvious,and thunderstorm gale days in We’nan and Dacheng as well as Langfang city were more,while they were least in the north of Langfang.The daily,monthly and annual variation of thunderstorm gale days were significant.The thunder-storm and gale mostly happened from afternoon to midnight,and the occurring time of gale was later than that of thunderstorm general-ly.The frequencies of thunderstorms lasting about 1 hour and gales lasting 10 minutes were the most.The thunderstorm gale weathers occur from March to October,especially in summer,and the occurring frequency is 73.3%.In the past 43 years,the days of thunder-storm gale decreased significantly,and the decreasing trends at stations in the middle of Langfang were the most significant.The muta-tion of thunderstorm gale days occurred in 1994,and the significant period was 3.23 years.
Keywords:thunderstorm gale  climatic characteristics  change trend
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