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| Surface Radiation and Energy Balance in the GuaiziLake of the Badain Jaran Desert |
| Yang Fan1, Ali Mamtimin1, He Qing1, Zheng Xinqian2, Na Muer3, Wang Yi3, Xu Yanqiang3, Xu Pengfei3 |
1. Taklimakan Desert Atmosphere and Environment Station, Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
2. Xinjiang Agro-meteorolical Observatory, Urumqi 830002, China;
3. Guaizi Lake Meteorological Station, Alxa League 735400, Inner Mongolia, China |
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Abstract In this paper, we analyzed the monthly mean diurnal variation characteristics of the surface radiation budget, energy flux and energy closure condition over the Guaizi Lake shifting sandy land in different seasons by use of surface radiation and turbulent flux data from July 2013 to April 2014. The result indicated that under no precipitation condition, the monthly average daily variation of each component of surface radiation and energy balance both showed the standard unimodal-type daily cycle pattern. Meanwhile, influenced by the difference of seasons, the daily variation curve had apparent seasonal variation, with every component manifested a feature of being maximum in July and minimum in January, and of being bigger in April than in October. The diurnal average of Rs↓, Rs↑, Rl↑, Rl↓, Rn in January and July was 98.9 W·m-2 and 614.6 W·m-2, 34.6 W·m-2 and 87.3 W·m-2, 276.9 W·m-2 and 494.2 W·m-2, 214.8 W·m-2 and 385.0 W·m-2, 0.35 W·m-2 and 128.7 W·m-2, respectively. The annual average surface albedo was 0.34, which was higher than in Tazhong and Xiaotang. The surface albedo in January was higher in Guaizi Lake area than in July. The diurnal average of H, LE, G0 in January and July was 4.7 W·m-2 and 78.8 W·m-2, 0.3 W·m-2 and 20.3 W·m-2, 2.9 W·m-2 and 35.0 W·m-2, respectively. From the perspective of energy distribution, the whole day latent heat flux in all seasons of the Guaizi Lake shifting sandy land always occupied a relatively low percent of net radiation, and in daytime, sensible heat was its main energy consumption form, second to which was soil heat conduction. After noon, Rn gradually declined, while influxes of sensible heat from ground surface to near surface air increased because of the lasting radiation force. Therefore, H/Rn kept increasing during day time.
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Received: 01 October 2014
Published: 20 November 2015
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2015, Vol. 35 
