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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (5): 1492-1500    DOI: 10.7522/j.issn.1000-694X.2013.00215
Weather and Climate     
Characteristics of Diffuse Radiation at Hinterland of the Taklimakan Desert
Ali Mamtimin1,2, MIAO Qi-long1, JIN Li-li1, HE Qing2, LI Zhen-jie3
1.College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2.Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002,China;
3.Lincang Meteorological Bureau, Lincang 677099, Yunnan, China
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Abstract  

In this paper, the characteristics of diffuse radiation (Rd) and its relationship with clearness index and air quality were analyzed by using global radiation, diffuse radiation and direct radiation data which was observed at the Desert Atmosphere and Environment Observation Experiment Station of the Taklimakan Desert in 2010. The results show that the total annual diffuse radiation is 3 628 MJ·m-2, accounting for 59.5% of the total radiation, and it is higher than the national average. The diffuse radiation is strong in summer (468.3 MJ·m-2) and weak in winter (120 MJ·m-2). The peak value of diffuse radiation appears at noon and instantaneous maximum irradiation intensity reach to 719.2 W·m-2 in summer. Compared with clearness index more than 0.7, the diffuse radiation increases in autumn and winter when clearness index is less than 0.7. The ratio of diffuse radiation to global radiation decreases linearly with the increase of clearness index when clearness index is greater than 0.3, while, the ratio of diffuse radiation to extraterrestrial solar radiation linearly with the increase of clearness index when clearness index is less than 0.3. The diffuse radiation decreases exponentially with the increase of solar elevation. In addition, the change of diffuse solar radiation concentrates at the range of air quality less than 5, and it reduces rapidly with the increase of air quality.

Key words:  diffuse radiation      clearness index      Taklimakan Desert     
Received:  27 January 2013      Published:  08 March 2013
ZTFLH:  P422.3  

Cite this article: 

Ali Mamtimin1,2, MIAO Qi-long1, JIN Li-li1, HE Qing2, LI Zhen-jie3. Characteristics of Diffuse Radiation at Hinterland of the Taklimakan Desert. JOURNAL OF DESERT RESEARCH, 2013, 33(5): 1492-1500.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00215     OR     http://www.desert.ac.cn/EN/Y2013/V33/I5/1492

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