Variation characteristics of total gaseous mercury at simian mountain background station in mid-subtropical region

被引：0
|
作者：
Liu W.-M. [1 ,2 ]
Ma M. [1 ,2 ]
Wang D.-Y. [1 ,2 ]
Sun T. [2 ]
Wei S.-Q. [1 ,2 ]
机构：
[1] Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, College of Resources and Environment, Southwest University, Chongqing
[2] Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing
来源：
Huanjing Kexue/Environmental Science | 2016年 / 37卷 / 05期
关键词：
Back trajectory analysis; Background area; Diurnal variation; Seasonal variation; Total gaseous mercury;
D O I：
10.13227/j.hjkx.2016.05.006
中图分类号：
学科分类号：
摘要：
Total gaseous mercury (TGM) was continuously monitored at the Simian Mountain Forest Nature Reserve in Chongqing, a representative of the mid-subtropical region, using high-resolution automatic atmospheric mercury vapor analyzer (Tekran 2537X) from March 2012 to February 2013. The results showed that the average concentration of TGM during the monitoring was (2.88±1.54) ng·m-3, which was much higher than the background TGM on north hemisphere but lower than those at most of the other monitoring sites in China. These results suggested that the TGM level in Simian Mountain was still in the normal range on regional scale, but had an increasing tendency globally. The TGM level exhibited a distinct seasonal variation, following the order of winter (3.68±2.43) ng·m-3>summer (3.29±0.79) ng·m-3>spring (2.44±0.69) ng·m-3>autumn (2.13±0.97) ng·m-3, and the TGM concentration varied to a greater extent in winter. The diurnal variation of TGM concentration characterized as being higher at the nighttime in spring, while higher during the daytime in other seasons. The concentration variation of TGM had a positive correlation to temperature and light intensity. The result of backward trajectory analysis using HYSPLIT showed that the main source of the TGM in Simian Mountain was the local coal combustion, and long distance transportation by the Indian monsoon might also play a role in the increasing TGM level. © 2016, Science Press. All right reserved.
引用
收藏
页码：1639 / 1645
页数：6
相关论文
共 16 条
  • [1] Zhou J., Feng X.B., Liu H.Y., Et al., Examination of total mercury inputs by precipitation and litterfall in a remote upland forest of Southwestern China, Atmospheric Environment, 81, pp. 364-372, (2013)
  • [2] Schroeder W.H., Munthe J., Atmospheric mercury-an overview, Atmospheric Environment, 32, 5, pp. 809-822, (1998)
  • [3] Pan L., Chai T.F., Carmichael G.R., Et al., Top-down estimate of mercury emissions in China using four-dimensional variational data assimilation, Atmospheric Environment, 41, 13, pp. 2804-2819, (2007)
  • [4] Feng X.B., Shang L.H., Wang S.F., Et al., Temporal variation of total gaseous mercury in the air of Guiyang, China, Journal of Geophysical Research, 109, D3, (2004)
  • [5] Lindberg S., Bullock R., Ebinghaus R., Et al., A synthesis of progress and uncertainties in attributing the sources of mercury in deposition, AMBIO: A Journal of the Human Environment, 36, 1, pp. 19-32, (2007)
  • [6] Han Y.J., Holsen T.M., Lai S.O., Et al., Atmospheric gaseous mercury concentrations in New York State: relationships with meteorological data and other pollutants, Atmospheric Environment, 38, 37, pp. 6431-6446, (2004)
  • [7] Li Z., Xia C.H., Wang X.M., Et al., Total gaseous mercury in Pearl River Delta region, China during 2008 winter period, Atmospheric Environment, 45, 4, pp. 834-838, (2011)
  • [8] Fu X.W., Feng X.B., Zhu W.Z., Et al., Total gaseous mercury concentrations in ambient air in the eastern slope of Mt. Gongga, South-Eastern fringe of the Tibetan plateau, China, Atmospheric Environment, 42, 5, pp. 970-979, (2008)
  • [9] Kim S.H., Han Y.J., Holsen T.M., Et al., Characteristics of atmospheric speciated mercury concentrations (TGM, Hg(II) and Hg(p)) in Seoul, Korea, Atmospheric Environment, 43, 20, pp. 3267-3274, (2009)
  • [10] Carpi A., Lindberg S.E., Sunlight-mediated emission of elemental mercury from soil amended with municipal sewage sludge, Environmental Science & Technology, 31, 7, pp. 2085-2091, (1997)
12