Atmospheric deposition and contamination of trace elements in snowpacks of mountain glaciers in the northeastern Tibetan Plateau

被引:35
作者
Wei, Ting [1 ,3 ]
Dong, Zhiwen [1 ,2 ,4 ]
Kang, Shichang [1 ,2 ,3 ]
Zong, Chunlei
Rostami, Masoud [4 ,5 ]
Shao, Yaping [4 ]
机构
[1] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Lanzhou 730000, Gansu, Peoples R China
[2] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Univ Cologne, Inst Geophys & Meteorol, D-50923 Cologne, Germany
[5] Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Trace elements; Contamination; Glacier snowpack; Anthropogenic sources; Northeastern Tibetan plateau; RECENT SNOW; POLLUTION; METALS; BASIN; PRECIPITATION; CHEMISTRY; CORES; SITE; LEAD;
D O I
10.1016/j.scitotenv.2019.06.455
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To investigate the large-scale trace element deposition and anthropogenic pollution in mountain glaciers of the northeastern Tibetan Plateau (TP) and its surrounding regions, we analyzed Al and 13 trace elements (As, Cd, Co, Cr, Cs, Cu, Mn, Mo, Ni, Pb, Sb, V, and Zn) in glacier snowpacks collected at the Yuzhufeng, Laohugou No.12, and Qiyi glaciers (YG, LG12, and QG, respectively) in the northeastern TP as well as in the Miaoergou Glacier (MG) in the eastern Tianshan Mountains in June 2017. The concentrations and enrichment factors (El's) of most trace elements (e.g., As, Cd, Co, Cr, Cu, Ni, and Sb) showed that the largest value appeared in the MG, followed by LG12, and the lowest value appeared in the QG, thereby implying a decreasing influence of anthropogenic emissions on these elements from the west (MG) W the east (QG). The YG inversely exhibited high concentrations but low EIs for As, Cd, Co, Cr, Cs, Cu, Pb, and Sb. Compared to the surrounding regions of the southern and western TP (e.g., Nam Co, ML Everest, and Pamirs), Japan, and Kathmandu, the trace element concentrations were relatively higher at the YG and MG but relatively lower at the LG12 and QG. The spatial distribution characteristics of trace elements (e.g., Pb and Sb) exhibited a gradually decreasing concentration from west to east in the Tianshan Mountains, and from south to north in the TP, implying two potential transport routes of atmospheric pollutants from Central and South Asia to the northeastern TP. The Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) backward trajectory model and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations/Cloud-Aerosol Lidar with Orthogonal Polarization (CALIPSO/CALIOP) data reflected that these trace elements in the MG, LG12, and QG predominately originated from the western and surrounding areas, whereas in the YG they were mainly derived from a local source and South Asia through long-distance transport. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:754 / 764
页数:11
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