| 天气与气候 |
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| Large Aperture Scintillometers(LAS) Observation in Semi-arid Regions of Northwestern China |
| HUANG Shan, ZHANG Wen-yu, ZUO Hong-chao, LIU Xin1, SHI Yong-yi2 |
| 1.Ministry of Education Key Laboratory of Semi-Arid Climatic Changes, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China; 2.Yangquan Meteorological Bureau of Shanxi Province, Shanxi Yangquan 045100, China |
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Abstract In this paper, sensible heat flux in semi-arid region of northwestern China were calculated and analyzed by use of the observation data of Large Aperture Scintillometers (LAS) recorded per 30 minutes, the temperature, pressure data, and the observation data by Eddy Covariance System at Lanzhou University Semi-arid Climate and Environment Observatory during summer and winter of 2007. The values of the sensible heat flux in summer were bigger than that in winter, and there was a lag of peak value on diurnal variation curve in winter; at the similar weather conditions, the fluctuation of sensible flux in summer was bigger than that in winter. Weather condition had a great impact on the observations of LAS, the values of the sensible heat flux in sunny days were higher than that in cloudy days at the same season. Compared with sensible heat flux observed by Eddy Covariance System, the sensible heat flux measured by LAS was a little larger, but the values by the two methods showed a good agreement, and the correlation coefficient in summer was 0.95, and it was 0.98 in winter.
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Received: 29 June 2010
Published: 20 March 2011
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2011, Vol. 31 
