摘要
设计了起伏地形下可照时间分布式计算模型,讨论了不同纬度的坡度、坡向、遮蔽等地形因子对可照时间的影响。结果表明:可照时间的纬向分布特征明显;同一纬度,同一坡向的可照时间随着坡度的增加而减小;坡向对可照时间的影响复杂,不同坡向上的可照时间随季节和坡度变化;在太阳高度角较低的冬季,地形遮蔽对可照时间的影响显著,可明显地影响可照时间的空间分布,清楚表现出可照时间的非地带性。同时绘制了 1: 100万我国实际地形下精细的可照时间空间分布。
A sunshine hours distribution model in mountainous areas is designed in this paper,and the effects of slope,aspect,shade on sunshine hours at different latitudes are also discussed.Results are as follows.The latitudinal character of sunshine hours is obvious;at the same latitude and in the same aspect,sunshine hours are reduced with the increase of slope;the effect of aspect on sunshine hours is complicated,and in different aspects,sunshine hours vary with seasons and slopes;the effect of shade on sunshine hours is obvious,and it affects the sunshine hours distribution,leading to the non-zonal distribution of sunshine hours,especially in winter when the sun altitude angle is low.The sunshine hours spatial distribution map of 1:1000000 in China under the condition of actual terrain is plotted.
出处
《南京气象学院学报》
CSCD
北大核心
2005年第1期64-71,共8页
Journal of Nanjing Institute of Meteorology
基金
国家重点基础研究发展规划项目(G19990436 01)
国家重点基础研究发展规划项目(G20000779)
关键词
可照时间
分布式
坡度
坡向
遮蔽
空间分布
sunshine hours
distribution model
slope
aspect
shade
spatial distribution
