A5064592421- Geology and Paleoclimatology Research
- Mercury impact and mitigation studies
- Heavy metals in environment
- Atmospheric chemistry and aerosols
- Isotope Analysis in Ecology
- Radioactive contamination and transfer
- Icing and De-icing Technologies
- Air Quality Monitoring and Forecasting
- Fire effects on ecosystems
- Atmospheric and Environmental Gas Dynamics
- Archaeology and ancient environmental studies
- Analytical chemistry methods development
- Cryospheric studies and observations
- Heavy Metal Exposure and Toxicity
Desert Research Institute
2023-2025
Oregon State University
2020-2022
Ancient texts and archaeological evidence indicate substantial lead exposure during antiquity that potentially impacted human health. Although routes were many included the use of glazed tablewares, paints, cosmetics, even intentional ingestion, most significant for nonelite, rural majority population may have been through background air pollution from mining smelting silver ores underpinned Roman economy. Here, we determined potential health effects this using Arctic ice core measurements...
Anthropogenic nitrogen oxide (NOx = NO + NO2) emissions have increased since the Industrial Revolution as a result of fossil fuel burning, contributing to increasing atmospheric acidity and changes oxidative capacity atmosphere. Oxidation NOx leads formation nitrate both in gas phase (HNO3(g)) aerosol (p-NO3–), which may then be removed from atmosphere via wet dry deposition. Ice core records thus used infer past concentrations given high enough accumulation rates prevent...
Abstract Estimating fire emissions prior to the satellite era is challenging because observations are limited, leading large uncertainties in calculated aerosol climate forcing following preindustrial era. This challenge further limits ability of models accurately project future change. Here, we reconstruct a gridded dataset global biomass burning from 1750 2010 using inverse analysis that leveraged array 31 ice core records black carbon deposition fluxes, two different historical emission...
Glacial ice provides an opportunity to understand changes in global atmospheric lead (Pb) pollution through examination of some Earth's least disturbed areas.While analytical fingerprinting capabilities have improved, the number Pb isotope measurements cores remains limited.Small sample size and low concentrations found glacial (often only a few pg/g) challenged capabilities.Studies that measure isotopes are limited either by lower precision (> 0.2% RSD) or opt for temporal resolution...