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Wildfire Smoke Contributions to Polycyclic Aromatic Hydrocarbon Loadings in Western Canadian Urban Surface Grime.
Environ Sci Technol
January 2025
Department of Chemistry & Chemical Biology, McMaster University, Hamilton L8S 4L8, Canada.
Wildfires emit large amounts of polycyclic aromatic hydrocarbons (PAHs) into the atmosphere. As PAHs emitted from anthropogenic sources are known to accumulate in urban surface grime present on building exteriors and windows, we hypothesized that PAH-containing wildfire smoke plumes could similarly increase PAH grime loadings. To explore this hypothesis, we coupled analysis of PAHs in grime samples collected from August to November 2021 in two historically smoke-affected Canadian cities, Calgary and Kamloops, with contemporaneous field- and model-based indicators of wildfire influence.
View Article and Find Full Text PDFMicroscale Spatiotemporal Variation of Reactive Oxygen Species in the Charosphere: Underlying Formation Mechanism and Their Role in CO Emission.
Environ Sci Technol
January 2025
College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
Charosphere, a highly active zone between biochar and surrounding soil, is widely present in agricultural and wildfire-affected soils, yet whether reactive oxygen species (ROS) are produced within the charosphere remains unclear. Herein, the production and spatiotemporal evolution of charosphere ROS were explored. In situ ROS capture visualized a gradual decrease in ROS production with increasing distance from the biochar/soil interface.
View Article and Find Full Text PDFImpacts of wildfire smoke PM, greenspace and terrain ruggedness on life expectancy in the contiguous United States.
Sci Total Environ
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Division of Environmental Health Sciences, College of Public Health, The Ohio State University, Columbus, OH 43210, USA. Electronic address:
Wildfire smoke PM has been associated with many adverse health effects. However, little is known about its impact on life expectancy. This study investigated the impact of wildfire smoke PM and its interaction with greenspace and terrain ruggedness on life expectancy in the contiguous United States.
View Article and Find Full Text PDFChilean Mediterranean forest on the verge of collapse? Evidence from a comprehensive risk analysis.
Sci Total Environ
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Departamento de Ingeniería Geoespacial y Ambiental, Facultad de Ingeniería, Universidad de Santiago de Chile, Chile.
World forests are experiencing significant modification due to the confluence of climate change and deforestation, with Mediterranean forests facing particularly acute threats. The Chilean Sclerophyllous Mediterranean Forest is considered a world biodiversity hotspot, a restricted ecosystem type that is highly affected by global change drivers. Despite the high ecological and environmental importance of this ecosystem, an integrated assessment of its risk derived from climate and land-use change is lacking.
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