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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于DEM的黄河流域天文辐射空间分布
DOI: 10.11821/xb200306002, PP. 810-816
Keywords: 天文辐射,起伏地形,空间分布,数字高程模型(DEM)
Abstract:
基于1km×1km分辨率的数字高程模型(DEM)数据，利用建立的起伏地形下天文辐射分布式计算模型，计算了黄河流域1km×1km分辨率各月天文辐射的空间分布。结果表明局部地形对黄河流域年和四季天文辐射的空间分布影响明显；在太阳高度角较低的冬季，地理和地形因子对天文辐射的影响相当强烈，山区天文辐射的空间差异大，1月份向阳山坡(偏南坡)天文辐射可为背阴山坡(偏北坡)的2~3倍，极端天文辐射的差异可达10倍以上；而在太阳高度角较高的夏季，天文辐射空间差异较小，7月份不同地形极端天文辐射的差异仅在16%左右；四季中，地形对天文辐射影响的程度为冬季>秋季>春季>夏季。
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