A5006772627- Mercury impact and mitigation studies
- Toxic Organic Pollutants Impact
- Air Quality and Health Impacts
- Geology and Paleoclimatology Research
- Heavy Metal Exposure and Toxicity
- Atmospheric and Environmental Gas Dynamics
- Geological formations and processes
- Fire effects on ecosystems
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Radiomics and Machine Learning in Medical Imaging
- Environmental Justice and Health Disparities
- Geochemistry and Elemental Analysis
- Heavy metals in environment
- Peatlands and Wetlands Ecology
Harvard University
2022-2024
Harvard University Press
2023
Bowdoin College
2019
Woods Hole Oceanographic Institution
2019
SignificanceRussian rivers are the predominant source of riverine mercury to Arctic Ocean, where methylmercury biomagnifies high levels in food webs. Pollution controls thought have decreased late-20th-century loading watersheds, but there no published long-term observations on Russian rivers. Here, we present a unique hydrochemistry dataset determine trends river particulate concentrations and fluxes recent decades. Using hydrologic deposition modeling together with multivariate time series...
Abstract Soils account for the largest global mercury reservoirs, but observations are sparse in many regions. The accumulation and turnover of soils determines whether they act as an atmospheric source or sink. Here, we present a spatial analysis soil from large survey (three horizons, ∼4800 sites) across conterminous United States conducted by U.S. Geological Survey. Soil pools were calculated 11 layers, cumulatively representing top 1 m soil, totaling 158 ± 2 Gg (±SD) (20.3 0.2 mg −2 )....
Abstract Volcanism is the largest natural source of mercury (Hg) to biosphere. However, past Hg emission estimates have varied by three orders magnitude. Here, we present an updated central estimate and interquartile range (232 Mg a −1 ; IQR: 170–336 ) for modern volcanic emissions based on advances in satellite remote sensing sulfur dioxide (SO 2 improved method considering uncertainty Hg:SO ratios. Atmospheric modeling shows influence surface atmospheric concentrations extratropical...
Abstract Mercury (Hg) is a naturally occurring element that has been greatly enriched in the environment by human activities like mining and fossil fuel combustion. Despite commonalities some carbon dioxide (CO 2 ) Hg emission sources, implications of long‐range climate scenarios for anthropogenic emissions have yet to be explored. Here, we present comprehensive projections extending year 2300 evaluate impacts on global atmospheric deposition. Projections are based four Shared Socioeconomic...
Hazardous air pollutants emitted by United States (U.S) coal-fired power plants have been controlled the Mercury and Air Toxics Standards (MATS) since 2012. Sociodemographic disparities in traditional pollutant exposures from U.S. are known to occur but not evaluated for mercury (Hg), a neurotoxicant that bioaccumulates food webs. Atmospheric Hg deposition domestic decreased 91% across contiguous 6.4 Mg 2010 0.55 2020. Prior MATS, populations living within 5 km of (n = 507) included greater...
Increasing wildfire activity at high northern latitudes has the potential to mobilize large amounts of terrestrial mercury (Hg). However, understanding implications for Hg cycling and ecosystems is hindered by sparse research on peatland emissions. In this study, we used measurements soil organic carbon (SOC) Hg, burn depth, environmental indices derived from satellite remote sensing develop machine learning models predicting emissions major wildfires in permafrost Yukon-Kuskokwim Delta...
Abstract. The Multi-Compartment Hg (mercury) Modeling and Analysis Project (MCHgMAP) is an international multi-model 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 (multi-model...
Mercury (Hg) is a naturally occurring element that has been greatly enriched in the environment by activities like mining and fossil fuel combustion. Despite commonalities some CO2 Hg emission sources, implications of long-range climate scenarios for anthropogenic emissions have yet to be explored. Here, we present comprehensive projections (2020-2300) evaluate impacts on global atmospheric deposition. Projections are based four shared socioeconomic pathway (SSP) narratives ranging from...