Elevated atmospheric deposition and dynamics of mercury in a remote upland forest of southwestern China
Elevated atmospheric deposition and dynamics of mercury in a remote upland forest of southwestern China
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DOI：
10.1016/j.envpol.2010.01.032
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发表时间：
2010-06-01
影响因子：
8.9
通讯作者：
Zhang, Hui
中科院分区：
文献类型：
--
作者：
Fu, Xuewu;Feng, Xinbin;Zhang, Hui
Mt.Mt.中国西南部贡嘎地区受到工业活动汞排放和燃煤汞排放的影响，区域背景站大气TGM和PHG的年平均值分别为3.98ngm(-3)和30.7pgm(-3)。本文对该地区山地森林中汞的质量平衡进行了研究。研究区大气沉降高度偏高，年平均THG沉降通量为92.5微克/立方米(-2)/年。总沉降量以干沉降量为主(71.8%)，湿沉降量占28.2%。森林是大气汞的一个大池，近76%的大气输入储存在森林土壤中。挥发和径流是森林THG损失的两条主要途径，其平均输出通量分别为14.0和8.6mgm(-2)a r(-1)。(C)2010爱思唯尔有限公司。保留所有权利。
Mt. Gongga area in southwest China was impacted by Hg emissions from industrial activities and coal combustion, and annual means of atmospheric TGM and PHg concentrations at a regional background station were 3.98 ng m(-3) and 30.7 pg m(-3), respectively. This work presents a mass balance study of Hg in an upland forest in this area. Atmospheric deposition was highly elevated in the study area, with the annual mean THg deposition flux of 92.5 mu g m(-2) yr(-1). Total deposition was dominated by dry deposition (71.8%), and wet deposition accounted for the remaining 28.2%. Forest was a large pool of atmospheric Hg, and nearly 76% of the atmospheric input was stored in forest soil. Volatilization and stream outflow were identified as the two major pathways for THg losses from the forest, which yielded mean output fluxes of 14.0 and 8.6 mu g m(-2) yr(-1), respectively. (C) 2010 Elsevier Ltd. All rights reserved.