Assessment of heavy metal contamination in the atmospheric deposition during 1950-2016 AD from a snow pit at Dome A, East Antarctica
Assessment of heavy metal contamination in the atmospheric deposition during 1950-2016 AD from a snow pit at Dome A, East Antarctica
复制标题
对公元 1950 年至 2016 年东南极洲 Dome A 雪坑大气沉降中重金属污染的评估
DOI：
10.1016/j.envpol.2020.115848
复制
发表时间：
2021-01-01
影响因子：
8.9
通讯作者：
Wang, Jiajia
中科院分区：
文献类型：
--
作者：
Liu, Ke;Hou, Shugui;Wang, Jiajia
南极洲微量元素记录可以提供重要的信息，以了解过去几个世纪人类活动对环境的影响。在这项研究中，我们调查了14种代表性重金属的大气浓度（Al、As、Cd、Co、Cu、Fe、K、Mg、Mn、Pb、Sb、Sr、Tl和V）的174个样品，我们发现所有金属的年浓度变化很大。地壳富集因子表明，近几十年来，部分重金属（Cd、Sb、Cu、As和Pb）的含量可能受到人类活动的影响。对来源区域的分析表明，Dome A的重金属污染主要是由澳大利亚和南美洲的人类活动（例如采矿生产、含铅汽油）造成的。根据微量元素通量与海冰浓度（SIC）、海表温度（SST）和地面2 m处年平均气温（T-2 m）的关系，分析表明Dome A大气气溶胶的沉积和输送受环南极大气环流的影响。(C)2020爱思唯尔有限公司保留所有权利。
Antarctic trace element records could provide important insights into the impact of human activities on the environment over the past few centuries. In this study, we investigated the atmospheric concentrations of 14 representative heavy metals (Al, As, Cd, Co, Cu, Fe, K, Mg, Mn, Pb, Sb, Sr, Tl and V) from 174 samples collected in a 4-m snow pit at Dome Argus (Dome A) on the East Antarctic Plateau, covering the period from 1950 to 2016 A.D. We found great variability in the annual concentration of all metals. The crustal enrichment factors suggest that the concentrations of some heavy metals (Cd, Sb, Cu, As and Pb) were likely influenced by anthropogenic activities in recent decades. An analysis of source regions suggests that heavy metal pollution at Dome A was largely caused by human activities in Australia and South America (e.g. mining production, leaded gasoline). Based on the relationship between the trace elements fluxes and sea ice concentration (SIC), sea surface temperature (SST) and annual mean air temperature at 2 m above the ground (T-2m), our analysis shows that deposition and transport of atmospheric aerosol at Dome A were influenced by circum-Antarctic atmospheric circulations. (C) 2020 Elsevier Ltd. All rights reserved.