摘要
为满足小面积区域(10 000 km2左右)雷电防御工作准确化、精细化的要求,选取人工观测半径用以优化1 km×1 km网格的雷电参数。实例分析表明:优化网格法可以修正1 km×1 km相邻网格的年平均地闪密度值的大幅波动,避免相邻网格突变值的出现。也可以使1 km×1 km网格的雷电日更符合气象意义。并可以准确分析用于表征区域强雷暴分布的平均单位雷电日地闪密度和最大单位雷电日地闪密度等雷电参数。
For an accurate and precise lightning protection in small area（ about 10 000 km2）,the artificial observed radius value is selected to optimize the 1 km × 1 km grid lightning parameters. The practical application shows that the optimized grid method can not only correct the large wave of the annual ground flash density between the adjacent grids due to the appearance of the jumping value between adjacent grids,but make the lightning day with 1 km × 1 km grid more meteorologically meaningful. Furthermore,it can also accurately analyze the lightning parameters characterized in regional strong thunderstorm distribution,such as the average ground flash density,the maximum daily ground flash density,and so on.
出处
《气象科学》
北大核心
2015年第3期334-339,共6页
Journal of the Meteorological Sciences
基金
国家自然科学基金资助项目(41275009)
宁波市气象局科技计划项目(NBQX2012010B)
关键词
雷暴
地闪密度
优化网格法
Thunderstorm
Ground flash density
Optimized grid method
