The Turbulence Intensity of Surface Layer and Land Surface Processes over Guaizi Lake Shifting Sandy Land on the Northern Margin of Badain Jaran Desert

Zheng Xinqian; Yang Fan; Li Chaofan; Pan Honglin; Ji Chunrong; Ali Mamtimin; Huo Wen; Yang Xinghua; Zhou Chenglong

doi:10.7522/j.issn.1000-694X.2018.00090

2019 , Vol. 39 >Issue 4: 103 - 112

DOI: https://doi.org/10.7522/j.issn.1000-694X.2018.00090

The Turbulence Intensity of Surface Layer and Land Surface Processes over Guaizi Lake Shifting Sandy Land on the Northern Margin of Badain Jaran Desert

Zheng Xinqian ,
Yang Fan ,
Li Chaofan ,
Pan Honglin ,
Ji Chunrong ,
Ali Mamtimin ,
Huo Wen ,
Yang Xinghua ,
Zhou Chenglong

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1. Xinjiang Agro-Meteorolical Observatory, Urumqi 830002, China;
2. Taklimakan Desert Meteorology Field Experiment Station of CMA, Institute ofDesert Meteorology, China Meteorological Administration, Urumqi 830002, China;
3. College of Atmospheric Science, Lanzhou University, Lanzhou 730000, China;
4. School of Geographic Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China

Received date: 2018-06-13

Revised date: 2018-08-17

Online published: 2019-07-12

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Abstract

In this paper, we analyzed the turbulent intensity, the relationship between normalized standard deviations of wind velocity components, temperature, water vapor, CO₂ and stability parameters z/L and bulk transfer coefficients in the atmospheric surface layer over Guaizi Lake shifting sandy land based on land-atmosphere turbulent flux data in July, October 2013 and January and April 2014. The results indicated that the turbulent intensity of wind velocity components decreased with the increase of wind velocity. The development of turbulence was much vigorous, when the average wind velocity was below 2 m·s^-1. The near-neutral and unstable atmospheric stratification condition were favorable to the development of turbulence. Also, the horizontal components of wind velocity were main factor that could impact turbulent intensity, and the influence of vertical wind velocity was relatively weak. Compared with other underlying surface, because of the desert was relatively flat, the mechanical turbulence of desert was weak. So the turbulent intensity of desert also was small. Further, we also found the normalized standard deviations of wind velocity components presented the less regularity and the obvious fluctuation was found at sunrise and sunset during diurnal variation. Bulk transfer coefficients decrease with increasing wind speeds under unstable atmospheric condition, and increase with increasing wind speeds under stable atmospheric condition.

Key words： Badain Jaran Desert; turbulence intensity; normalized standard deviation; bulk transfer coefficients

Cite this article

Zheng Xinqian , Yang Fan , Li Chaofan , Pan Honglin , Ji Chunrong , Ali Mamtimin , Huo Wen , Yang Xinghua , Zhou Chenglong . The Turbulence Intensity of Surface Layer and Land Surface Processes over Guaizi Lake Shifting Sandy Land on the Northern Margin of Badain Jaran Desert[J]. Journal of Desert Research, 2019 , 39(4) : 103 -112 . DOI: 10.7522/j.issn.1000-694X.2018.00090

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