Abstract：
To clarify gaseous elemental mercury (GEM) in suburban megacities in the Yangtze River Delta region, China, we observed GEM concentrations from December 2019 to November 2020 in Wujing town, a suburban area of Shanghai. The annual mean GEM concentration was 1.44 ± 0.88 ng m-3. Compared with the historical monitoring data of GEM in Shanghai over the past 10 years, the concentration of GEM showed a decreasing trend. The monthly mean concentrations of GEM showed clear seasonal variation, with higher values in the spring and winter. In spring and winter, typical Hg pollution events were observed, which could be mostly associated with increased local anthropogenic activity and temperature inversion. The results of the correlation analysis of the daily mean GEM concentrations with the AQI and backward trajectory calculations indicate that mercury pollution at monitoring sites can be affected by local, regional and interregional influences.
摘要：
为弄清长江三角洲地区郊区特大城市的气态元素汞（GEM），中国,我们观察了2019年12月至2020年11月吴井镇的创业板浓度，上海的一个郊区。GEM的年平均浓度为1.44±0.88ngm-3。与上海创业板近10年的历史监测数据相比，GEM浓度呈下降趋势。GEM的月平均浓度表现出明显的季节性变化，在春季和冬季具有较高的值。在春天和冬天，观察到典型的汞污染事件，这可能主要与当地人为活动和温度反转的增加有关。日平均GEM浓度与AQI和后向轨迹计算的相关性分析结果表明，监测点处的汞污染可能受到当地，区域和区域间影响。
