【摘要】 利用济南地区2008—2017年3—11月50个区域自动站逐时降水数据,研究该区域雨强超过10.0、20.0、30.0 mm·h^-1的降水量时空变化特征。结果表明:济南全区小时强降水受城市化、地形和盛行风的影响显著,济南城区、南部山区、长清山前地带、商河等地降水偏多,济南市区下风向近郊、章丘、济阳、平阴一带强降水偏少。7、8月济南地区小时强降水最多,雨强≥20.0 mm·h^-1的月平均降水量均超过40.0 mm,贡献率均超过25.0%。小时强降水日变化呈双峰双谷特征,11:00和23:00前后为强降水最少时段,04:00—05:00和14:00—21:00是强降水较多时段。大部分站点强降水峰值出现在午夜至凌晨和下午至傍晚时段。更多还原

【Abstract】 Based on the hourly precipitation data of 50 automatic meteorological stations in Jinan area from March to November during 2008-2017, the temporal and spatial variation characteristics of precipitation with rainfall intensity over 10.0, 20.0, 30.0 mm·h^-1 were studied. The results show that the hourly heavy precipitation in Jinan was affected by urbanization, topography and prevailing winds. There were more precipitation in Jinan urban area, southern mountainous area, Shanghe county and piedmont region in Changqing district, while there were relatively less precipitation in the downwind area of the suburbs, Zhangqiu district, Jiyang district and Pingyin county. Hourly heavy precipitation occurred most in July and August, monthly average precipitation with rain intensity equal to or more than 20.0 mm·h^-1 was over 40.0 mm and its contribution rate was over 25.0%. The diurnal variation of heavy precipitation was characterized by double peaks and double valleys. The minimum precipitation period was around 11:00 and 23:00, and the maximum precipitation period was 04:00-05:00 and 14:00-21:00. Most sites had peak precipitation from midnight to early morning and from afternoon to evening.更多还原