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Arid Land Geography >

2019 , Vol. 42 >Issue 4: 774 - 781

DOI: https://doi.org/10.12118/j.issn.1000-6060.2019.04.08

Differences in snow albedo between Tianshan Mountainsand northern Xinjiang

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  • 1 Department of Geographic Information Science,Nanjing University,Nanjing 210023,Jiangsu,China;2 Jiangsu Provincial  Key Laboratory of Geographic Information Science and Technology,Nanjing University,Nanjing 210023,Jiangsu,China; 3 Key Laboratory for Satellite Mapping Technology and Applications of State Administration of surveying, Mapping and  Geoinformation of China,Nanjing 210023,Jiangsu,China

Received date: 2019-01-12

  Revised date: 2019-04-01

  Online published: 2019-07-24

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Abstract

Tianshan Mountains and Northern Xinjiang is one of the three stable snowcovered areas in winter in China.The changes in snow albedo of this area significantly affect the solar radiation energy absorbed by the surface.Based on the snow albedo observation in Tianshan Mountains and Northern Xinjiang from January to March in 2018,combined with temperature,industrial structure and urban distribution of Xinjiang,this paper summarizes the spatial and temporal differences of snow albedo,and the change law of snow albedo was also analyzed.It could help to explore the relationship between snow albedo and snow cover in this region,and provide a scientific basis for further study of the role of snow in the balance of surface energy,hydrological processes and global changes.The 57 points with snow albedo,temperature,snow surface density,snow depth and snow particle size distributed in Tianshan Mountains and Northern Xinjiang are used.In terms of method,this paper analyzes the difference of snow albedo in the study area from time and space.In terms of time,the albedo distribution range is divided into four intervals,by analyzing the distribution of snow albedo in the three periods in four intervals,the relationship between snow albedo and temperature,snow surface density,snow depth and snow particle size is summarized.In terms of space,the study area is divided into four areas: Altay region,Tacheng region,the northern slope of Tianshan Mountains and Ili River Valley,combined with Xinjiang industrial structure and urban distribution,it is concluded that the difference in pollutant content is the main factor causing the difference in snow albedo in the four regions.From time perspective,due to the influence of temperature changes,the snow albedo in the study area showed a downward trend.The declines in different periods were different,and the change in albedo from the end of January to the beginning of March is more pronounced than the change in albedo from the beginning of January to the end of January.In terms of locations,there is a difference between snow albedo in various regions (Altay region,Tacheng region,the northern slope of Tianshan Mountains and Ili River Valley) due to the influence of the pollutant content.The snow albedo in the Tianshan region (the northern slope of Tianshan Mountains and the Ili River Valley) is lower than that in the northern Xinjiang region (Altay region and Tacheng region),and the albedo on the northern slope of Tianshan Mountains is the lowest.Last but not least,during the stable period and the ablation period,the effect of the pollutant content on snow albedo is most obvious.

Key words： snow cover; albedo; spatiotemporal difference; snow changes; Xinjiang

Cite this article

Differences in snow albedo between Tianshan Mountainsand northern Xinjiang . Differences in snow albedo between Tianshan Mountainsand northern Xinjiang[J]. Arid Land Geography, 2019 , 42(4) : 774 -781 . DOI: 10.12118/j.issn.1000-6060.2019.04.08

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