Mercury fluxes and pools in three subtropical forested catchments, southwest China.
Mercury fluxes and pools in three subtropical forested catchments, southwest China.
复制标题
DOI：
10.1016/j.envpol.2008.11.018
复制
发表时间：
2009-03
影响因子：
8.9
通讯作者：
Zhangwei Wang;Xiaoshan Zhang;Jingsong Xiao;Ci Zhijia;Pingzhong Yu
中科院分区：
文献类型：
--
作者：
Zhangwei Wang;Xiaoshan Zhang;Jingsong Xiao;Ci Zhijia;Pingzhong Yu
森林集水区是汞循环的重要组成部分，也是大气和水环境之间的联系。本文研究了中国西南亚热带森林流域汞的输入和输出通量及其截留。大气汞输入显着增强，观察和凋落物汞的贡献起着更重要的作用，在这些亚热带森林集水区。LGS和TSP的汞输出通量占总输入通量的比例分别为2.5%和1.2%，明显低于欧洲和北美的报告值。目前的年输入汞仅占LGS和TSP中上部90 cm土壤中汞的0.8 ‰和1.8 ‰。这表明，亚热带森林流域是重要的保留大气汞沉降在中国西南地区。
Forested catchments are an important part of the mercury (Hg) cycle and a link between the atmospheric and the aquatic environments. In this study, Hg input and output fluxes and its retention were investigated at subtropical forested catchments in southwest China. Significantly enhanced atmospheric Hg inputs were observed, and the contribution of litterfall Hg plays a more important role at these subtropical forested catchments. The ratios of Hg output fluxes from stream water to total input were 2.5% and 1.2% for LGS and TSP, which were markedly lower than those reported from Europe and North America. The current annual input Hg only accounted for 0.8 and 1.8 per mille to the Hg stored in the upper 90 cm of soil in LGS and TSP. These suggest that subtropical forested catchments are important for retention of atmospheric mercury deposition in southwest China.