马鞍山地区雷电时空变化特征

Spatial and Temporal distribution Characteristic of Lightning in Ma'anshan Area

利用1959—2011年马鞍山地区4个观测站53年的逐日人工雷暴观测资料,通过surfer软件绘图计算、经验正交分解(EOF)、建立时间序列以及气候趋势等方法,分析了马鞍山雷电时空变化特征。结果表明:马鞍山雷暴日数呈现东西部、南部偏多,中北部偏少的特点,时间分布上雷暴日数呈下降走势,其气候倾向率为-5.3/10a,季节性分布上主要集中在夏季,雷暴期有延长的趋势,日变化规律十分明显,午后13时至夜间为雷暴出现高峰期。

Based on the lightning location data of the 4 stations in Ma＇ anshan area 53a from 2006 to 2011, calculation by surfer software, drawing the empirical orthogonal decomposition （EOF） , with series and climate trends methods, we analyzed spatial and temporal distribution characteristic of lightning in Maanshan. Results showed more thunderstorm days in east, west and south, and less in the north. Time distribution on thunderstorm days shows a downward trend, and the climate tendency rate was -5.3/10a. Thunderstorms are mainly in summer, and thunderstorm period is prolonged. Diurnal variation law is obvious, and the thunderstorm peak from 13：00 to night.