气候变化领域集成服务门户(CCPortal): Atmospheric mercury in the Southern Hemisphere - Part 2: Source apportionment analysis at Cape Point station; South Africa

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DOI	10.5194/acp-20-10427-2020
	Atmospheric mercury in the Southern Hemisphere - Part 2: Source apportionment analysis at Cape Point station; South Africa
	Bieser J.; Angot H.; Slemr F.; Martin L.
发表日期	2020
ISSN	1680-7316
起始页码	10427
结束页码	10439
卷号	20 期号:17
英文摘要	Mercury (Hg) contamination is ubiquitous. In order to assess its emissions, transport, atmospheric reactivity, and deposition pathways, worldwide Hg monitoring has been implemented over the past 10-20 years, albeit with only a few stations in the Southern Hemisphere. Consequently, little is known about the relative contribution of marine and terrestrial Hg sources, which is important in the context of growing interest in effectiveness evaluation of Hg mitigation policies. This paper constitutes Part 2 of the study describing a decade of atmospheric Hg concentrations at Cape Point, South Africa, i.e. the first long-term (> 10 years) observations in the Southern Hemisphere. Building on the trend analysis reported in Part 1, here we combine atmospheric Hg data with a trajectory model to investigate sources and sinks of Hg at Cape Point. We find that the continent is the major sink, and the ocean, especially its warm regions (i.e. the Agulhas Current), is the major source for Hg. Further, we find that mercury concentrations and trends from long-range transport are independent of the source region (e.g. South America, Antarctica) and thus indistinguishable. Therefore, by filtering out air masses from source and sink regions we are able to create a dataset representing a southern hemispheric background Hg concentrations. Based on this dataset, we were able to show that the interannual variability in Hg concentrations at Cape Point is not driven by changes in atmospheric circulation but rather due to changes in global emissions (gold mining and biomass burning). © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	air quality; atmospheric deposition; atmospheric pollution; biomass burning; concentration (composition); emission inventory; gold mine; mercury (element); pollutant transport; pollution monitoring; source apportionment; Southern Hemisphere; Cape Point; South Africa; Western Cape
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141114
作者单位	Helmholtz-Zentrum Geesthacht (HZG), Institute of Coastal Research, Max-Planck-Str. 1, Geesthacht, 21502, Germany; Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, United States; Max-Planck-Institut für Chemie (MPI), Air Chemistry Division, Hahn-Meitner-Weg 1, Mainz, 55128, Germany; South African Weather Service C/o Csir, P.O. Box 320, Stellenbosch, 7599, South Africa
推荐引用方式 GB/T 7714	Bieser J.,Angot H.,Slemr F.,et al. Atmospheric mercury in the Southern Hemisphere - Part 2: Source apportionment analysis at Cape Point station; South Africa[J],2020,20(17).
APA	Bieser J.,Angot H.,Slemr F.,&Martin L..(2020).Atmospheric mercury in the Southern Hemisphere - Part 2: Source apportionment analysis at Cape Point station; South Africa.Atmospheric Chemistry and Physics,20(17).
MLA	Bieser J.,et al."Atmospheric mercury in the Southern Hemisphere - Part 2: Source apportionment analysis at Cape Point station; South Africa".Atmospheric Chemistry and Physics 20.17(2020).