Deposition Process of Dust Microparticles from Aerosol to Snow-Firn Pack on Glacier No. 1 in Eastern Tianshan Mountains, China

Xiaoni YOU; Zhiwen DONG

doi:10.1007/s12583-011-0200-y

Volume 22 Issue 4

Aug 2011

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Journal of Earth Science > 2011 > 22(4): 460-469.

Xiaoni YOU, Zhiwen DONG. Deposition Process of Dust Microparticles from Aerosol to Snow-Firn Pack on Glacier No. 1 in Eastern Tianshan Mountains, China. Journal of Earth Science, 2011, 22(4): 460-469. doi: 10.1007/s12583-011-0200-y

Citation:

Xiaoni YOU, Zhiwen DONG. Deposition Process of Dust Microparticles from Aerosol to Snow-Firn Pack on Glacier No. 1 in Eastern Tianshan Mountains, China. Journal of Earth Science, 2011, 22(4): 460-469. doi: 10.1007/s12583-011-0200-y

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Deposition Process of Dust Microparticles from Aerosol to Snow-Firn Pack on Glacier No. 1 in Eastern Tianshan Mountains, China

doi: 10.1007/s12583-011-0200-y

Xiaoni YOU^{1
,
,},
Zhiwen DONG²

1.
Tianshui Normal University, Tianshui 741001, China
2.
State Key Laboratory of Cryospheric Sciences/Tien Shan Glaciological Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

More Information

Corresponding author: Xiaoni You, youxiaoni_818@yeah.net
Received Date: 27 Oct 2010
Accepted Date: 30 Dec 2010
Publish Date: 01 Aug 2011

Abstract

Abstract

Samples were continuously collected from aerosol, fresh snow, and snow pits on Glacier No. 1 at Urumqi River source in eastern Tianshan (天山) Mountains. The deposition processes and the characteristics of mineral dust microparticles from aerosol to fresh snow, and then evolution to the snow pit were determined. Total dust microparticle concentration in the surface snow and aerosol showed a similar temporal variation trend, which was strongly associated with regional and local atmospheric circulation in the Tianshan Mountains region of Central Asia. Especially from November to February, the correlation coefficient of microparticles concentration in surface snow and aerosol is very high (R ²=0.7). Vertical profiles of microparticles in the snow pits showed that observed dust layers were in high correlation with concentration peaks of large microparticles (d > 10 μm), but low correlation with that of fine microparticles (d < 1 μm). Moreover, explicit post-depositional process of dust particles was studied by tracking some typical dust concentration peaks in the snow pit. We find that late summer is a key period for post-deposition of dust particles in the snow, as particle concentration peaks in the snow pit evolve intensely during this period. Such evolutional pattern of large particles makes it possible to preserve information of atmospheric dust in the snow, which offers an available proof to reconstruct historical climate using ice cores on Glacier No. 1 and other glaciers in the Tianshan Mountains.
- Glacier No. 1,
- dust microparticle,
- post-deposition

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References(34)

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