Elemental composition of aerosol in the Nam Co region, Tibetan Plateau, during summer monsoon season
Elemental composition of aerosol in the Nam Co region, Tibetan Plateau, during summer monsoon season
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青藏高原纳木错地区夏季风季气溶胶的元素组成
DOI：
10.1016/j.atmosenv.2006.09.046
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发表时间：
2007-02-01
影响因子：
5
通讯作者：
Wang, Guangfu
中科院分区：
文献类型：
--
作者：
Cong, Zhiyuan;Kang, Shichang;Wang, Guangfu
为了研究青藏高原偏远地区大气气溶胶的化学特征，于2005年7 - 10月在纳木错综合观测研究站连续采集了大气总悬浮颗粒物。PIXE分析结果表明，气溶胶中Si、Ca、Fe、Al、K和S是主要成分，含量范围为82（K）~ 550（Si）ng m（-3）。平均元素浓度与其他偏远地点的浓度相当，但明显低于特大城市（如北京）的浓度。人为元素含量很低，表明纳木错地区是大气监测的理想背景地点。地壳富集因子（EF）计算表明，几个人为重金属（Cr，Ni，Cu，Zn，As）在大气中长距离传输。后向气团轨迹分析表明，南亚可能是这些污染物的来源区域。(c)2006爱思唯尔有限公司保留所有权利。
In order to investigate the chemical characteristics of atmospheric aerosols in a remote region of the Tibetan Plateau, total suspended particles were collected continuously at the Nam Co Comprehensive Observation and Research Station from July to October 2005. The PIXE analytical results showed that Si, Ca, Fe, Al, K, and S were the major components of aerosols, ranging from 82 (K)-550 (Si) ng m(-3). The mean elemental concentrations were comparable with those from other remote sites and significantly lower than those from megacities (e.g. Beijing). The very low presence of anthropogenic elements demonstrates that the Nam Co region is an ideal background site for atmospheric monitoring. Crustal enrichment factor (EF) calculation indicated that several anthropogenic heavy metals (Cr, Ni, Cu, Zn, As) are transported long distances atmospherically. The backward air mass trajectory analysis suggests that South Asia may be the source region of those pollutants. (c) 2006 Elsevier Ltd. All rights reserved.