Journal ArticleDOI
A Synthesis of Progress and Uncertainties in Attributing the Sources of Mercury in Deposition
Steve E. Lindberg,Russell Bullock,Ralf Ebinghaus,Daniel R. Engstrom,Xinbin Feng,William F. Fitzgerald,Nicola Pirrone,Eric M. Prestbo,Christian Seigneur +8 more
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TLDR
It is agreed that the uncertainty is strongly dependent upon scale and that the question as stated is answerable with greater confidence both very near and very far from major point sources, assuming that the “global pool” is a recognizable “source.”Abstract:
A panel of international experts was convened in Madison, Wisconsin, in 2005, as part of the 8th International Conference on Mercury as a Global Pollutant. Our charge was to address the state of science pertinent to source attribution, specifically our key question was: "For a given location, can we ascertain with confidence the relative contributions of local, regional, and global sources, and of natural versus anthropogenic emissions to mercury deposition?" The panel synthesized new research pertinent to this question published over the past decade, with emphasis on four major research topics: long-term anthropogenic change, current emission and deposition trends, chemical transformations and cycling, and modeling and uncertainty. Within each topic, the panel drew a series of conclusions, which are presented in this paper. These conclusions led us to concur that the answer to our question is a "qualified yes," with the qualification being dependent upon the level of uncertainty one is willing to accept. We agreed that the uncertainty is strongly dependent upon scale and that our question as stated is answerable with greater confidence both very near and very far from major point sources, assuming that the "global pool" is a recognizable "source." Many regions of interest from an ecosystem-exposure standpoint lie in between, where source attribution carries the greatest degree of uncertainty.read more
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The role of terrestrial vegetation in atmospheric Hg deposition: Pools and fluxes of spike and ambient Hg from the METAALICUS experiment
Jennifer A. Graydon,Vincent L. St. Louis,Steve E. Lindberg,Ken A. Sandilands,John W. M. Rudd,Carol A. Kelly,R. Harris,Michael T. Tate,D. P. Krabbenhoft,Craig A. Emmerton,Hamish Asmath,Murray Richardson +11 more
TL;DR: In this article, a Geographical Information Systems (GIS)-based approach was used to quantify canopy and ground vegetation pools of experimentally applied upland and wetland spike Hg within the METAALICUS watershed over the terrestrial loading phase of the experiment.
Journal ArticleDOI
Spatial and temporal variation of THg concentrations in run-off water from 19 boreal catchments, 2000-2010.
TL;DR: The correlation between THg and OM indicates that OM is the main controlling factor independent of geographical variation in Hg deposition, geology, or any other factor evaluated in this study.
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Atmospheric mercury speciation dynamics at the high-altitude Pic du Midi Observatory, southern France
Xuewu Fu,Xuewu Fu,Nicolas Marusczak,Lars-Eric Heimbürger,Bastien Sauvage,François Gheusi,Eric Prestbo,Jeroen E. Sonke +7 more
TL;DR: In this paper, continuous measurements of atmospheric gaseous elemental mercury (GEM), particulate bound mercury (PBM), and Gaseous oxidized (GOM) at the high-altitude Pic du Midi Observatory (PDM Observatory) in southern France were made from November 2011 to November 2012.
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Variation trends and influencing factors of total gaseous mercury in the Pearl River Delta—A highly industrialised region in South China influenced by seasonal monsoons
Laiguo Chen,Ming Liu,Zhencheng Xu,Ruifang Fan,Jun Tao,Duohong Chen,Deqiang Zhang,Donghai Xie,Jiaren Sun +8 more
TL;DR: In this paper, total gaseous mercury (TGM), meteorological parameters and criteria pollutant concentrations were measured at Mt. Dinghu (DH), a regional monitoring site and Guangzhou (GZ, an urban monitoring site) in the PRD region from October 2009 to April 2010 and from November 2010 to November 2011, respectively.
Journal ArticleDOI
Monsoon-facilitated characteristics and transport of atmosphericmercury at a high-altitude background site in southwestern China
TL;DR: In this paper, the influence of monsoonal climate and transport of atmospheric mercury (Hg) in southwestern China has been investigated using measurements of total gaseous mercury (TGM), defined as the sum of Gaseous elemental mercury (GEM), GOM, particulate bound mercury (PBM), and GOM were carried out at Ailaoshan Station (ALS, 2450m m.a.s.
References
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Journal ArticleDOI
The biogeochemical cycling of elemental mercury: Anthropogenic influences☆
TL;DR: A review of the available information on global Hg cycling shows that the atmosphere and surface ocean are in rapid equilibrium; the evasion of Hg0 from the oceans is balanced by the total oceanic deposition of hg(II) from the atmosphere as mentioned in this paper.
Journal ArticleDOI
The Case for Atmospheric Mercury Contamination in Remote Areas
TL;DR: A review of the weaknesses in interpretation and the choice of information that has been used to argue against atmospheric Hg contamination can be found in this paper, where the authors examine the weaknesses of the information used to support the prevailing scientific view that natural geologic sources are the principal contributors of Hg.
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Global anthropogenic mercury emission inventory for 2000
TL;DR: Wilson et al. as mentioned in this paper presented a new inventory of global emissions of mercury to the atmosphere from anthropogenic sources for the year 2000, showing that the largest emissions of Hg to the global atmosphere occur from combustion of fossil fuels, mainly coal in utility, industrial, and residential boilers.
Journal ArticleDOI
Arctic springtime depletion of mercury
W.H. Schroeder,Kurt G. Anlauf,Leonard A. Barrie,J. Y. Lu,Alexandra Steffen,D. Schneeberger,Torunn Berg +6 more
TL;DR: In this paper, the authors show that during the spring (April to early June) of 1995, there were frequent episodic depletions in mercury vapour concentrations in Arctic surface air.