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| 基于DEM的黄河流域天文辐射空间分布 | |
| 引用本文： | 曾燕,邱新法,刘昌明,吴险峰.基于DEM的黄河流域天文辐射空间分布[J].地理学报,2003,58(6):810-816. |
| 作者姓名： | 曾燕 邱新法 刘昌明 吴险峰 |
| 作者单位： | 1. 中国科学院地理科学与资源研究所,北京,100101 2. 南京气象学院资源环境与城乡规划系,南京,210044 3. 北京师范大学环境科学研究所,北京,100875 |
| 基金项目： | 国家重点基础研究发展规划项目(G19990436-01) ~~ |
| 摘 要： | 基于1 km×1 km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1 km×1 km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。 |
| 关 键 词： | 数字高程模型 DEM 黄河流域 天文辐射空间分布 起伏地形 计算模型 辐射特点 |
| 收稿时间： | 2003-06-08 |
| 修稿时间： | 6/8/2003 12:00:00 AM |
Study on Astronomical Solar Radiation Distribution over the Yellow River Basin Based on DEM Data |
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| ZENG Yan,QIU Xinf,LIU Changming,Wu Xianfeng.Study on Astronomical Solar Radiation Distribution over the Yellow River Basin Based on DEM Data[J].Acta Geographica Sinica,2003,58(6):810-816. | |
| Authors: | ZENG Yan QIU Xinf LIU Changming Wu Xianfeng |
| Institution: | 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2. Department of Geography, Nanjing Institute of Meteorology, Nanjing 210044, China; 3. Institute of Environmental Science, Beijing Normal University, Beijing 100875, China |
| Abstract: | Based on a distributed model for calculating astronomical solar radiation (ASR), monthly ASR with a resolution of 1 km×1 km for the rugged topography of the Yellow River Basin is calculated, with DEM data as the general characterization of terrain. This model gives an all-sided consideration on factors that influence the ASR. Results suggest that (1) the annual ASR has a progressive decreasing trend from south to north; (2) the order of seasonal ASR is summer>spring>autumn>winter; (3) the geographical and topographical factors have robust effects on the spatial distribution of ASR, particularly in winter where a lower sun elevation angle exists; (4) the ASR magnitude for slopes with a sunny exposure is generally 2 or 3 times that of slopes with a shading exposure in January and the extreme difference of ASR for different terrains is over 10 times; (5) the spatial differences of ASR are relatively small in summer where a higher sun elevation angle exists and the extreme difference of ASR for different terrains is only 16% in July; and (6) the sequence of influence strength for topography is winter>autumn>spring>summer. |
| Keywords: | astronomical solar radiation rugged terrains spatial distributions DEM |
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