Trade-Induced Atmospheric Mercury Deposition over China and Implications for Demand-Side Controls
Trade-Induced Atmospheric Mercury Deposition over China and Implications for Demand-Side Controls
复制标题
贸易引起的中国大气汞沉积及其对需求侧控制的影响
DOI：
10.1021/acs.est.7b04607
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发表时间：
2018-02-20
影响因子：
11.4
通讯作者：
Shu, Jiong
中科院分区：
文献类型：
--
作者：
Chen, Long;Meng, Jing;Shu, Jiong
汞汞（Hg）因其对人类和环境的不利影响而受到全球关注。除了远距离大气迁移外，汞排放还可以通过经济贸易进行地理迁移。在这里，我们调查的影响，中国的区域间贸易对大气汞沉降在中国，使用大气传输模式和多区域投入产出分析。中国大气汞沉降总量为408.8 Mg yr（-1），其中32%集中在中国的区域间贸易中，主要集中在甘肃、河南、河北和云南等省。省际贸易对中国大气汞沉降的再分配作用显著，其沉降通量变化范围为-104%~+28%。发达地区，如长江三角洲（上海、江苏和浙江）和广东，避免了汞在其地理边界上的沉积，反而导致发展中省份的汞沉积增加。在某些地区，省与省之间的双边互动很强，这表明需要联合减缓，如京津冀地区（北京，天津和河北）和长江三角洲。发达地区向发展中国家的贸易伙伴转让先进技术是缓解中国汞污染的有效措施。我们的研究结果与中国省际间减少跨界汞污染的努力有关。
Mercury Mercury (Hg) is of global concern because of its adverse effects on humans and the environment. In addition to long-range atmospheric transport, Hg emissions can be geographically relocated through economic trade. Here, we investigate the effect of China's interregional trade on atmospheric Hg deposition over China, using an atmospheric transport model and multiregional input output analysis. In general, total atmospheric Hg deposition over China is 408.8 Mg yr(-1), and 32% of this is embodied in China's interregional trade, with the hotspots occurring over Gansu, Henan, Hebei, and Yunnan provinces. Interprovincial trade considerably redistributes atmospheric Hg deposition over China, with a range in deposition flux from -104% to +28%. Developed regions, such as the Yangtze River Delta (Shanghai, Jiangsu, and Zhejiang) and Guangdong, avoid Hg deposition over their geographical boundaries, instead causing additional Hg deposition over developing provinces. Bilateral interaction among provinces is strong over some regions, suggesting a need for joint mitigation, such as the Jing-Jin-Ji region (Beijing, Tianjin, and Hebei) and the Yangtze River Delta. Transferring advanced technology from developed regions to their developing trade partners would be an effective measure to mitigate China's Hg pollution. Our findings are relevant to interprovincial efforts to reduce trans -boundary Hg pollution in China.