Abstract
Taking factors such as astronomy, atmosphere, microgeography and local landscape that comprehensively affect solar radiation into account, we established a direct solar radiation (DSR) model on the accidented topography. Dynamics of DSR on accidented topography in Henan province were also statistically analyzed. Modeling results showed that highest DSR in Henan occurred between May and July, while lowest DSR occurred between December and February of the next year, and the multi-annual mean DSR in Henan province was 2127.7MJ/ m2. Impacts of local landscape on DSR on accidented topography in Henan province differs in different seasons. In winter half year, during which solar altitude angle is relatively low, this impact is more significant.
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