首页|Anthropogenic Sulfate and Nitrate Signals in Snow from Bogda Glacier,Eastern Tianshan
Anthropogenic Sulfate and Nitrate Signals in Snow from Bogda Glacier,Eastern Tianshan
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A 1.2 m snow pit was recovered on July 29th,2009 from the Bogda Glacier,eastern Tianshan(天山)．The sample site temperature of -9.6℃indicates that the unique glaciochemical record was well preserved and suitable for the reconstruction of air pollution levels in this previously unexplored region.Samples were analyzed for major ions(Na+,K+,Ca2+,Mg2+,NH4+,CI-,SO42-,N03-,HCOO-,and CH3000).NO33-and S0424-were characterized by significant high levels of pollution concentration.Most air masses backward trajectories ending in December 2008 have passed the Urumqi City center,while some even traveled across the primary nuclear weapons testing venue of the former Soviet Union(STS).The mean pH value of snow samples is coincident with the average value of Urumqi's aerosol,and the ratio of 1N031/ISO42-1 in the snow pit generally agrees with the value of the Urumqi winter aerosols.In addition,the [HCOO-]/ICH3000-] ratio of snow samples is only 0.7,lower than unity.These analyses indicate that S042-and N03-in the Bogda Glacier are the result of anthropogenic pollutions.
anthropogenic pollutionsSO42-NO3-
Xiaoyu Zhang、Ross Edwards
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State Key Laboratory of Cryospheric Sciences/Tianshan Glaciological Station,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China
Graduate University of Chinese Academy of Sciences,Being 100049,China
Desert Research Institute,Reno NV 89512-1095,USA
Curtin University of Technology,Bentley WA6102,Australia
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This study was supported by the National Basic Research Program of ChinaKnowledge Innovation Project of the Chinese Academy of Sciencesprogram for New Century Excellent Talents in UniversityFund of SKLCS
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