Global change effects on biogeochemical mercury cycling

AMBIO, Journal Year: 2023, Volume and Issue: 52(5), P. 853 - 876

Published: March 29, 2023

Abstract Past and present anthropogenic mercury (Hg) release to ecosystems causes neurotoxicity cardiovascular disease in humans with an estimated economic cost of $117 billion USD annually. Humans are primarily exposed Hg via the consumption contaminated freshwater marine fish. The UNEP Minamata Convention on aims curb environment is accompanied by global monitoring efforts track its success. biogeochemical cycle a complex cascade release, dispersal, transformation bio-uptake processes that link sources exposure. Global change interacts impacting physical, ecological factors control these processes. In this review we examine how such as biome shifts, deforestation, permafrost thaw or ocean stratification will alter cycling Based past declines environmental levels, expect future policy impacts should be distinguishable from effects at regional scales.

Language: Английский

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The impact of mercury contamination on human health in the Arctic: A state of the science review

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 831, P. 154793 - 154793

Published: March 25, 2022

Language: Английский

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Arctic atmospheric mercury: Sources and changes

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 839, P. 156213 - 156213

Published: May 24, 2022

Global anthropogenic and legacy mercury (Hg) emissions are the main sources of Arctic Hg contamination, primarily transported there via atmosphere. This review summarizes state knowledge global emissions, examines recent changes source attribution transport deposition to using models. Estimated atmosphere for 2015 were ~2220 Mg, ~20% higher than 2010. anthropogenic, geogenic were, respectively, responsible 32%, 64% (wildfires: 6–10%) 4% annual deposition. Relative contributions origin was dominated by in East Asia (32%), Commonwealth Independent States (12%), Africa (12%). Model results exhibit significant spatiotemporal variations fluxes, driven regional differences air routes, surface precipitation uptake rates, inter-seasonal atmospheric circulation pathways. simulations reveal that meteorology having a profound impact on contemporary Arctic. Reversal North Atlantic Oscillation phase from strongly negative 2010 positive 2015, associated with lower temperature more sea ice Canadian Arctic, Greenland surrounding ocean, resulted enhanced production bromine species Hg(0) oxidation evasion ocean waters 2015. led increased Hg(II) (and its deposition) reduced concentrations these regions line High observations. However, combined overall elevated modeled levels compared contrary observed declines at most monitoring sites, likely due uncertainties emission speciation, wildfire model representations air-surface fluxes.

Language: Английский

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Toxicity of methylmercury in aquatic organisms and interaction with environmental factors and coexisting pollutants: A review

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 943, P. 173574 - 173574

Published: May 31, 2024

Language: Английский

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From Stockholm to Minamata and beyond: Governing mercury pollution for a more sustainable future

One Earth, Journal Year: 2022, Volume and Issue: 5(10), P. 1109 - 1125

Published: Oct. 1, 2022

The 50th anniversary of the 1972 United Nations Conference on Human Environment provides an opportunity to reflect mercury pollution as a sustainability issue past, present, and future. Scientists policy-makers recognize that is connected multiple challenges, but more comprehensive understanding global governance in context needed. Here, this Review, we synthesize existing literature evaluate relation sustainability. We find 50-year trends production, consumption, discharges are mixed, has expanded; from coal-fired power plants artisanal small-scale gold mining, two leading sectors pollution, increasingly challenges; global-scale indicator can provide policy-relevant information, cannot capture local variations; long-term interventions addressing use part broader transitions.

Language: Английский

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None

Arctic and North, Journal Year: 2023, Volume and Issue: 51

Published: June 26, 2023

Арктика и Север» зарегистрирован

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Coastal Inorganic Mercury Time Series Reveals Interannual and Seasonal Variability Driven by Regional Climate Factors

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

Inorganic mercury (iHg) is an anthropogenic pollutant that forms monomethylmercury, a neurotoxicant affecting human health through seafood consumption. Despite iHg emission reduction policies, the impact on oceanic concentrations remains unclear due to limited long-term data. Here, we present four-year weekly time series of at Scripps Pier in La Jolla, California, capturing seasonal and interannual variability. Interannual variability driven by wet season precipitation, with conditions exhibiting sevenfold higher variance than dry conditions, potentially linking climate modes, such as El Niño-Southern Oscillation. Seasonally, precipitation wave dynamics influence inputs, seasons runoff upwelling. Using model informed these parameters, reconstructed 20-year record iHg, suggesting decline 0.005 pM yr^{− 1}. Our findings highlight challenges detecting trends emphasize need for sustained monitoring concentrations.

Language: Английский

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Coastal inorganic mercury time series reveals interannual and seasonal variability driven by regional climate factors

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: April 16, 2025

Language: Английский

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The Multi-Compartment Hg Modeling and Analysis Project (MCHgMAP): mercury modeling to support international environmental policy

Geoscientific model development, Journal Year: 2025, Volume and Issue: 18(9), P. 2747 - 2860

Published: May 16, 2025

Abstract. The Multi-Compartment Hg (mercury) Modeling and Analysis Project (MCHgMAP) is an international multimodel research initiative intended to simulate analyze the geospatial distributions temporal trends of environmental inform effectiveness evaluations two multilateral agreements (MEAs): Minamata Convention on Mercury (MC) Long-Range Transboundary Air Pollution (LRTAP). This MCHgMAP overview paper presents its science objectives, background, rationale; experimental design (multimodel ensemble (MME) architecture, inputs evaluation data, simulations, reporting framework); methodologies for analysis simulated levels. primary goals project are facilitate detection attribution recent (observed) future (projected) spatial patterns global levels identification key knowledge gaps in modeling improve cycles MEAs. current advances challenges models, emission inventories, observational data examined, optimized introduced address policy questions A common set emissions, conditions, observation datasets proposed (where possible) enhance MME comparability. novel harmonized simulation approach between atmospheric, land, oceanic, multimedia models account short- long-term changes secondary exchanges achieve mechanistic consistency across matrices. comprehensive model experiments prioritized ensure systematic participation a variety from scientific community.

Language: Английский

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Climate change dynamics and mercury temporal trends in Northeast Arctic cod (Gadus morhua) from the Barents Sea ecosystem

Environmental Pollution, Journal Year: 2023, Volume and Issue: 338, P. 122706 - 122706

Published: Oct. 9, 2023

The Northeast Arctic cod (Gadus morhua) is the world's northernmost stock of Atlantic and considerable ecological economic importance. are widely distributed in Barents Sea, an environment that supports a high degree ecosystem resiliency food web complexity. Here using 121 years ocean temperature data (1900-2020), 41 sea ice extent information (1979-2020) 27 total mercury (Hg) fillet concentration (1994-2021, n = 1999, ≥71% Methyl Hg, 20) from Sea ecosystem, we evaluate effects climate change dynamics on Hg temporal trends cod. We observed low consistently stable, concentrations (yearly, least-square means range 0.022-0.037 mg/kg wet wt.) length-normalized fish, with slight decline most recent sampling periods despite significant increase temperature, sharp regional extent. Overall, our suggest amplification "Atlantification," other perturbations along rapidly declining over last ∼30 did not translate into major increases or decreases bioaccumulation Our findings consistent similar long-term, assessments inhabiting Oslofjord, Norway, investigations empirical for marine apex predators. This demonstrates highly context specific, some species may be as sensitive to current change-contaminant interactions currently thought. Fish bioaccumulation-climate relationships complex uniform, predators can vary considerably within among species, geographically. regimes biota nuanced likely driven by suite factors such local diets, sources bioenergetics, toxicokinetic processing, growth metabolic rates individuals taxa, inputs anthropogenic activities at varying spatiotemporal scales. Collectively, these have important policy implications global security, Minamata Convention Mercury, several relevant UN Sustainable Development Goals.

Language: Английский

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