基于GIS的山地实照时数的时空分布特征

Temporal and spatial distribution characteristics of sunshine duration based on GIS in mountainous areas

该文描述了山地实照时数的空间分布模型,并以浙江省仙居县为例,通过山区高空间分辨率的DEM数据和气象站点的日照百分率数据,在G IS技术的支持下对山区实照时数的空间分布进行了模拟和结果验证,结果表明,研究区内的两个气象站的模拟值和实际值之间具有很好的一致性,决定系数分别为0.9435和0.87。并分析了山区实照时数的时间分布特征和不同海拔高度、坡度和坡向上年实照时数的空间分布特征。该方法和结果对于山区的农业、林业和生态环境等方面的研究具有较重要的理论和实际意义。

In this paper, the authors described the spatial distribution model of sunshine duration in mountainous areas. With the aid of GIS technology, the authors took Xianju County of Zhejiang Province as an example, modeled the spatial distribution of monthly sunshine duration by using 1 ： 10000 DEM data with high spatial resolution and sunshine percentage data and validated the result. Validation determined that the simulated values were inagreement with the measured values, with a determined coefficient of 0. 9435 （Xianju meteorological station） and 0. 87 （Kuocangshan meteorological station）. The temporal distribution characteristics of sunshine duration and its spatial variation with different altitude, slope and aspect were analyzed. The method and result have great significance for the research fields of agriculture, forestry and ecology in mountainous area.