摘要
提要:针对求解物理量在一定区域内的平均值问题,设计了一种权重面积方法。并以求解西北区域年平均降水量、1月份和7月份的平均空中水汽含量为例,将该方法与算术平均法、泰森多边形法、网格插值法进行了对比试验。结果发现该方法在站点较多、但不均匀的大范围区域内计算气象场的平均分布是可行的,其优点是计算量小、受缺测站点影响较小。
A weighted area scheme is designed for calculating mean value of a regional meteorological field. The method is used to calculate the mean annual precipitation, the water vapor content of January and July over northwestern China. Compared with arithmetic method, Tyson polygon method as well as grid point interpolation method, the method is regilable to calculate the aerography field hypodispersion in macroscopy area, if there have more sites and these sites are nonuniform distribution. Its advantage is smaller computational complexity and more slight influence of the lacking observation.
出处
《气象》
CSCD
北大核心
2006年第4期52-55,共4页
Meteorological Monthly
基金
国家自然科学基金创新群体项目(40421101)资助。
关键词
加权平均
权重面积
扇形分割
泰森多边形
格点插值
weighted average
weighting area
sectorial subdivision
Tyson polygon method
grid point interpolation
