辽宁省内陆与沿海城市雷暴活动特征对比分析  

Comparative analysis of the thunderstorm characteristics of Liaoning inland and coastal cities

作　　者：郜凌云[1] 栾健[1] 王迪[2] 马虹旭[3] 栾澜[4] 

机构地区：[1]中国气象局气象干部培训学院辽宁分院,辽宁沈阳110166 [2]辽宁省气象服务中心,辽宁沈阳110166 [3]辽宁省防雷技术服务中心,辽宁沈阳110166 [4]沈阳农业大学农学院,辽宁沈阳110866

出　　处：《气象与环境学报》2017年第2期95-100,共6页Journal of Meteorology and Environment

基　　金：辽宁省气象局博士科研专项(D201603);辽宁省交通气象预报专家型团队共同资助

摘　　要：利用1961—2012年辽宁省59个气象台站的雷暴观测资料和美国NCEP/NCAR逐日再分析资料,采用气候趋势分析法和合成t检验法,对辽宁省内陆城市和沿海城市的雷暴活动及其大气环流特征进行了对比分析。结果表明:1961—2012年辽宁省内陆城市年平均雷暴日数呈自东部和西部山区向中部丘陵和平原地区逐渐递减的趋势,沿海城市年平均雷暴日数普遍少于内陆城市,随纬度降低雷暴日数减少;辽宁省内陆城市和沿海城市雷暴日数均呈逐年减少的趋势,但沿海城市雷暴日数减少的速度比内陆城市快。内陆城市雷暴活动与近地面气温、亚洲纬向和经向环流有关,沿海城市雷暴活动与对流层中低层的风场和高度场密切相关,雷暴日数的年际变化与西太平洋副热带高压脊线的位置密切相关。Using the thunderstorm observation data from 1961 to 2012 from 59 meteorological stations in Liaoning province and the NCEP/NCAR （National Center for Environmental Prediction/National Center for Atmospheric Research） dally reanalysis data, the characteristics of thunderstorm activities and atmospheric circulation for inland and coastal cities were compared and analyzed based on the climate trend analysis and the synthesis of t-test meth- ods. The results show that the annual mean number of thunderstorm days for inland cities decreases gradually from the east and the west mountain areas to the central hill and plain areas. The annual mean number of thunderstorm days for coastal cities decreases with the decreasing of latitudes and is generally less than that for inland cities. The annual mean number of thunderstorm days for inland and coastal cities both shows a decreasing trend with a time of year, and the decreasing speed for coastal cities is faster than that for inland cities. The thunderstorm activities for inland cities are related to the near-surface air temperature ,Asian zonal and meridional circulations, and those for coastal cities are closely related to the wind and height fields at the lower and middle troposphere, and its inter- annual variation of thunderstorm activities is closely related to the ridge line location of the Western Pacific sub- tropical high.

关 键 词：内陆城市 沿海城市 雷暴 大气环流 

分 类 号：P468.028[天文地球—大气科学及气象学]