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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (3): 866-873    DOI: 10.7522/j.issn.1000-694X.2013.00123
Weather and Climate     
Comparison and Analysis on the Variation of Potential Evapotranspiration across the Qinghai Lake and the Poyang Lake in Recent 50 Years
WANG Wen-yu1,2,3, YANG Shen-bin2, ZHANG Qiang1,3, L Kai-long2, SUN Xiang-yu2, XIAO Wen2, HU Yong2
1.Atmospheric Science College, Lanzhou University, Lanzhou 730000, China;
2.College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;
3.Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Open Laboratory of Arid Climatic Change and Disaster Reduction of China Meteorological Administration, Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China
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Abstract  

In this study, the areas around the Qinghai Lake and the Poyang Lake, which are quite different in climate environment and geographical location, are selected as studied areas. The temporal and spatial variation of potential evapotranspiration of these two areas is analyzed. The main meteorological factor ET0 was extracted and the difference of climate between the two areas was discussed. Major results are as follows: The ET0 in the area around the Poyang Lake shows a declining tendency with dumping rate of -2.2 mm\5a-1 during the past 50 years, while the potential evapotranspiration in the area around the Qinghai Lake does not show significant amount of inter-annual variation with dumping rate of -0.02 mm\5a-1. The spatial distributions of ET0 for the two areas are of a significant difference. Among the main meteorological factors affecting ET0, sunshine duration, temperature and wind speed positively correlated with potential evapotranspiration, while the vapor pressure showed a negative correlation. The contribution of meteorological elements in different parts is of different sizes. Among them, the primary factor is temperature, followed by wind speed. However, the combined effects of local meteorological factors may be greater than the effects of temperature change to ET0.

Key words:  potential evapotranspiration      Penman-Monteith equation      temporal and spatial variation      Poyang Lake      Qinghai Lake     
Received:  17 February 2012      Published:  07 March 2012
ZTFLH:  P463.24  

Cite this article: 

WANG Wen-yu1,2,3, YANG Shen-bin2, ZHANG Qiang1,3, L Kai-long2, SUN Xiang-yu2, XIAO Wen2, HU Yong2. Comparison and Analysis on the Variation of Potential Evapotranspiration across the Qinghai Lake and the Poyang Lake in Recent 50 Years. JOURNAL OF DESERT RESEARCH, 2013, 33(3): 866-873.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00123     OR     http://www.desert.ac.cn/EN/Y2013/V33/I3/866

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