Current Methods of Estimating Atmospheric Mercury Fluxes in Remote Areas

Rasmussen, Pat E.

doi:10.1021/es00062a006

Cited by 157 publications

(85 citation statements)

References 90 publications

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“…Rasmussen (1994) argued that the contribution of anthropogenic inputs to Hg concentrations in aquatic environments are difficult to determine because natural concentrations vary from 0.01-0.3 kg/g. However, baseline concentrations of Hg (0.06 f0.01 pg/g) are not highly variable in San Francisco Bay, despite some of the richest geologic deposits of Hg in the world in the watershed (Nriagu, 1994).…”

Section: Discussionmentioning

confidence: 99%

Historical trends of metals in the sediments of San Francisco Bay, California

et al. 1999

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Section: Discussionmentioning

confidence: 99%

Historical trends of metals in the sediments of San Francisco Bay, California

et al. 1999

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“…Industrial emissions, mainly from coal combustion, waste incineration, and industrial processes are the primary sources of Hg to the atmosphere (Driscoll et al 2007a). Important natural Hg sources include volcanic activity, soil mineral weathering and forest fires (Rasmussen 1994 (Amyot et al 1994;Ericksen and Gustin 2004;Ericksen et al 2006). …”

Section: Introductionmentioning

confidence: 99%

A synthesis of rates and controls on elemental mercury evasion in the Great Lakes Basin

Denkenberger

Driscoll

Branfireun

et al. 2012

Environmental Pollution

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Rates of surface-air elemental mercury (Hg o ) fluxes in the literature were synthesized for the Great Lakes Basin (GLB). For the majority of surfaces, fluxes were net positive (evasion).Digital land-cover data were combined with representative evasion rates and used to estimate annual Hg o evasion for the GLB (7.7 Mg/yr). This value is less than our estimate of total Hg deposition to the area (15.9 Mg/yr), suggesting the GLB is a net sink for atmospheric Hg. The

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“…Despite an ongoing discussion about the in£uence of geological sources on Hg records in peat and lake sediments [7,8], some of these studies have shown unambiguously that anthropogenic Hg emissions have increased relative to natural sources since the beginning of the industrial age. Mason et al [2] have estimated that 70^80% of the present-day atmospheric Hg £ux can be attributed to anthropogenic sources.…”

Section: Introductionmentioning

confidence: 99%

Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) – an anthropogenic signal from the Southern Hemisphere

Biester

Kilian

Franzen

et al. 2002

Earth and Planetary Science Letters

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Increasing mercury deposition rates in the Northern Hemisphere recorded in natural archives such as peat bogs or lake sediments have been documented in numerous studies. However, data on atmospheric Hg deposition in the Southern Hemisphere dating back to pre-industrial times are rare. Here, we provide a continuous record of atmospheric Hg deposition in the Southern Hemisphere recorded by an ombrotrophic peat bog of the Magellanic Moorlands, Chile (53 ‡S), extending back 3000 yr. Pre-industrial mercury accumulation rates range between 2.5 and 3.9 Wg/m 2 /yr. In the past 100 yr, Hg accumulation rates increased 18-fold from about 3 Wg/m 2 /yr to a maximum of 62.5 Wg/m 2 /yr. If Hg accumulation rates were normalized to peat accumulation rates, maximum rates were 7.9 Wg/m 2 / yr, which is only 2.5 times the pre-industrial rates. Thus, Hg accumulation rates normalized to peat accumulation rates are more comparable to the three-fold net increase in atmospheric Hg concentrations estimated for the same period. We suggest that the increase in Hg accumulation rates in the Magellanic Moorlands within the past 100 yr is at least partly attributed to global dispersion of Hg derived from anthropogenic sources in the Northern Hemisphere. The finding that no increase of atmospheric deposition of Pb could be observed in the bog indicates the extraordinary long-range transport and ubiquitous dispersion of anthropogenic derived gaseous Hg compared to other metals. ß

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Current Methods of Estimating Atmospheric Mercury Fluxes in Remote Areas

Cited by 157 publications

References 90 publications

Historical trends of metals in the sediments of San Francisco Bay, California

Historical trends of metals in the sediments of San Francisco Bay, California

A synthesis of rates and controls on elemental mercury evasion in the Great Lakes Basin

Elevated mercury accumulation in a peat bog of the Magellanic Moorlands, Chile (53°S) – an anthropogenic signal from the Southern Hemisphere

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