Changes of Main Climatic Parameters and Potential Evapotransipiration in Typical Semi-arid Sandy Lands of Northern China during 1951-2005

JOURNAL OF DESERT RESEARCH

2012, Vol. 32

Issue (5): 1384-1392 DOI:

Weather and Climate

Changes of Main Climatic Parameters and Potential Evapotransipiration in Typical Semi-arid Sandy Lands of Northern China during 1951-2005

YANG Zhen-chang1, LI Yu-lin2, CUI Duo2, CHEN Jing2, ZHAO Xue-yong2

1.Baiyin Institute of Agricultural Science, Baiyin 730900, Gansu, China;
2.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract The changes of main climatic parameters and potential evapotranspiration were calculated and analyzed by using the Penman-Monteith model and observation data in typical semi-arid sandy lands (Horqin Sandy Land, Hunshadake Sandy Land and Mu Us Sandy Land) of Northern China during 1950-2005. During this period, annual mean temperature significantly increased; annual precipitation fluctuated, and annual mean wind speed decreased significantly in these sandy lands. Potential evapotranspiration increased significantly in the Hunshandake Sandy Land, increased slightly in the Horqin Sandy Land, but slightly decreased in the Mu Us Sandy Land. Partial correlation analysis showed that the annual potential evapotranspiration in Mu Us Sandy Land was significantly positively correlated with the annual sunshine hours and the annual mean wind speed, and was significantly negatively correlated with the annual mean temperature. However, the annual potential evapotranspiration in Horqin Sandy Land and Hanshandake Sandy Land was significantly positively correlated with the annual mean temperature, but it was irrelevant with the sunshine hours. Therefore, it can be concluded that decreasing of annual sunshine hours and annual mean wind speed may cause the decreasing of annual potential evapotranspiration in the Mu Us Sandy Land, and variations of annual potential evapotranspiration in the Horqin Sandy Land and the Hunshandake Sandy Land may be affected by annual mean temperature.

Key words: potential evapotranspiration temperature precipitation wind speed semi-arid sandy land

Received: 08 February 2012 Published: 20 September 2012



	Articles by authors
	YANG Zhen-chang
	LI Yu-lin
	CUI Duo
	CHEN Jing
	ZHAO Xue-yong

Cite this article:

YANG Zhen-chang, LI Yu-lin, CUI Duo, CHEN Jing, ZHAO Xue-yong. Changes of Main Climatic Parameters and Potential Evapotransipiration in Typical Semi-arid Sandy Lands of Northern China during 1951-2005. JOURNAL OF DESERT RESEARCH, 2012, 32(5): 1384-1392.

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http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2012/V32/I5/1384

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