Legacy impacts of historical anthropogenic mercury emissions on the global source-receptor relationships
- 作者：Long ChenWei ZhangYindong TongXuejun Wang
- 会议时间：2015-12-08
- 关键词：mercury ; legacy impacts ; source-receptor relationship ; human activities ; anthropogenic enrichment
- 作者单位：Long Chen,Xuejun Wang(Ministry of Education Laboratory of Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China)Wei Zhang(School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China)Yindong Tong(School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China)
- 母体文献：2015年汞污染防治与履行国际汞公约国际研讨会论文集
- 会议名称：2015年汞污染防治与履行国际汞公约国际研讨会
- 会议地点：北京
- 主办单位：中国环境科学学会
- 语种：chi
摘要
Growing concerns have focused on the relationships between emitted and deposited mercury (Hg) on intercontinental scales.Compared with previous studies on modern source-receptor relationships, we use a global biogeochemical model of Hg (eight continents and eight ocean basins defined) to evaluate the legacy impacts of historical anthropogenic emissions on the source-receptor relationships.A historical anthropogenic emission inventory from 2000 BC to present is used to drive the model.Results indicate human activities contribute the most to Arctic Ocean among all ocean basins with 29%, 19%, 13% and 11% of oceanic Hg from North America, Europe, South America and Asia, respectively.Anthropogenic emission from North America is the largest source for all oceanic receptors (avg.27%) except Asia for North Pacific (37%).These findings are inconsistent with the dominant contributor of Asia in previous studies.Total proportion of contribution from continental anthropogenic sources to the whole ocean has increased from 14% in 1500 to 85% in 2008.In the modern era (post-1990), historical anthropogenic emissions from North America and Asia are the two primary sources for the ocean.These findings reveal the legacy impacts of historical anthropogenic emissions are significant on global source-receptor relationships of Hg, and policy-makers had better to revisit the role of critical source continents.