| Technology Application |
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Simulation of the total solar radiation over micro-landform and correlation between the solar radiation and the land surface temperature |
| WEI Shenglong1,2, CHEN Zhibiao1,3, CHEN Zhiqiang1,3, WANG Qiuyun1,2, MA Xiuli1,2, YAN Xinyu1,2 |
1. College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China;
2. Key Laboratory for Subtropical Mountain Ecology, Ministry of Science and Technology and Fujian Province Funded, Fujian Normal University, Fuzhou 350007, China;
3. Institute of geography, Fujian Normal University, Fuzhou 350007, China |
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Abstract Solar radiation is the most important energy source in the Earth. The Yangxin's research shows that the effect of DEM scale causes great uncertainty to the simulation of solar radiation, and the impacts of DEM resolution on the simulation of the solar radiation are much greater in hilly area than in the mountainous area. To estimate the solar radiation model (SRAD), the authors measured the micro terrains with the help of real-time kinematic (RTK) and achieved the 0.1 m×0.1 m high-resolution DEM by TGO and ArcGIS10.0 software. Then the authors analyzed the correlation between the solar radiation and the land surface temperature. It is found that the solar radiation is differently distributed on the micro-landform. Groove ridge, sunny and gentle slopes accept more solar radiation than groove bottom, shady and steep slopes. The radiation is in descending order of summer(2 149.96 MJ/m2), spring(1 903.97 MJ/m2), autumn(1 461.86 MJ/m2) and winter(1 093.11 MJ/m2), and solar radiation is reduced gradually with the increase of the grade of slope. The results show that the land surface temperature is significantly correlated to solar radiation (0.622).
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| Keywords
GF-1
extraction of water body information
modified shadow water index(MSWI)
decision tree classification
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Issue Date: 23 January 2017
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2017,
Vol. 29
