Daily Local-Level Estimates of Ambient Wildfire Smoke PM_2.5 for the Contiguous US

Environmental Science & Technology, Год журнала: 2022, Номер 56(19), С. 13607 - 13621

Опубликована: Сен. 22, 2022

Smoke from wildfires is a growing health risk across the US. Understanding spatial and temporal patterns of such exposure its population impacts requires separating smoke-driven pollutants non-smoke long time series to quantify measure impacts. We develop parsimonious accurate machine learning model daily wildfire-driven PM2.5 concentrations using combination ground, satellite, reanalysis data sources that are easy update. apply our contiguous US 2006 2020, generating estimates smoke over 10 km-by-10 km grid use these characterize levels trends in PM2.5. contributions have increased by up 5 μg/m3 Western last decade, reversing decades policy-driven improvements overall air quality, with fastest for higher income populations predominantly Hispanic populations. The number people locations at least 1 day above 100 per year has 27-fold including nearly 25 million 2020 alone. Our set can bolster efforts comprehensively understand drivers societal extremes wildfire smoke.

Язык: Английский

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Pollutant emissions from biomass burning: A review on emission characteristics, environmental impacts, and research perspectives

Particuology, Год журнала: 2023, Номер 85, С. 296 - 309

Опубликована: Июль 28, 2023

Язык: Английский

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Wildfire impacts on surface water quality parameters: Cause of data variability and reporting needs

Environmental Pollution, Год журнала: 2022, Номер 317, С. 120713 - 120713

Опубликована: Ноя. 23, 2022

Язык: Английский

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Air quality and ventilation: exploring solutions for healthy and sustainable urban environments in times of climate change

Results in Engineering, Год журнала: 2024, Номер unknown, С. 103157 - 103157

Опубликована: Окт. 1, 2024

Язык: Английский

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Investigation of 2021 wildfire impacts on air quality in southwestern Turkey

Atmospheric Environment, Год журнала: 2024, Номер 325, С. 120445 - 120445

Опубликована: Март 7, 2024

Язык: Английский

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Transboundary vegetation fire smoke and expressed sentiment: Evidence from Twitter

Journal of Environmental Economics and Management, Год журнала: 2024, Номер 124, С. 102928 - 102928

Опубликована: Янв. 21, 2024

Язык: Английский

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Wildfire Smoke Contributions to Polycyclic Aromatic Hydrocarbon Loadings in Western Canadian Urban Surface Grime

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 30, 2025

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 loadings. To explore this hypothesis, coupled analysis samples collected August November 2021 two historically smoke-affected Canadian cities, Calgary Kamloops, with contemporaneous field- model-based indicators influence. In Calgary, a single day contributed over 20% total loadings during study's 3-month sampling period, which implies inputs have potential dominate composition typical season. although congener profile displayed sustained background influence, were dominated by hyper-local combustion event, highlights even small-scale activities control pollutant nearby surfaces. both locations, temporal profiles showed no evidence reactive loss, implying biomass burning contributes presence persistent reservoir available for direct exposure or runoff-mediated contamination downstream environmental compartments.

Язык: Английский

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The Impact of the 2023 Canadian Forest Fires on Air Quality in Southern Ontario

Journal of Geophysical Research Atmospheres, Год журнала: 2025, Номер 130(5)

Опубликована: Март 3, 2025

Abstract The record‐breaking 2023 Canadian wildfire season had large‐scale burning that resulted in wide‐reaching long‐range transport of smoke plumes and their associated trace gases. This paper examines three events (May 16‐23, June 3‐9 17‐30, 2023) during which the composition was measured over Toronto Egbert, Ontario. Tropospheric columns (0–10 km) CO, C 2 H 6 , CH 3 OH, HCN, HCOOH, NH O were using high‐resolution Fourier transform infrared spectrometers. Coincident enhancements CO other gases used to calculate enhancement ratios. Correlations with observed for HCN but not . Plume investigated Hybrid Single‐Particle Lagrangian Integrated Trajectory model, GEM‐MACH‐FireWork (GM‐FW) air quality Measurements Pollution Troposphere (MOPITT) satellite data. Additional measurements examined surface PM 2.5 plume height from a Mini Micro Pulse Lidar, EM27/SUN XCO columns. GM‐FW model output compared ground‐based 0–10 km column measurements, MOPITT maps. Over forest fire (May‐September), underestimated background tropospheric generally overestimated events. Relative situ seasonal averages (which enhanced events), while fluctuated between positive negative bias. Compared MOPITT, event‐averaged appropriately represent dispersion across country, some offsets on scale locations are consistent discussed findings.

Язык: Английский

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Impact of Wildfire Smoke PM2.5 on Indoor Air Quality of Public Buildings on a University Campus

ACS ES&T Air, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

With increasing wildfire events impacting many regions worldwide, understanding and mitigating the effects of smoke on indoor air quality (IAQ) in public buildings are essential for protecting occupant health. This study investigated impact IAQ across 24 campus Alberta, Canada, representing spaces with varied ventilation systems. Using a network low-cost sensors to monitor PM2.5, identified significant spikes during events, 71% exceeding Canadian Ambient Air Quality Standards daily limit 27 μg/m3. The had mechanical systems filters different Minimum Efficiency Reporting Value (MERV) ratings. MERV13 were found be more efficient at capturing PM2.5 particles, resulting lower indoor/outdoor ratios (0.12 ± 0.07) compared MERV8 (0.28 0.14). Buildings change rates (ACH) ranging from 5 15 per hour exhibited infiltration patterns, higher ACH generally leading elevated concentrations events. highlights need balance pollutant by optimizing filtration efficiency reduce PM2.5. trajectory-fire interception method, combined satellite data, enhanced identification wildfire-influenced periods, contributing better dynamics. These findings underscore that even advanced alone may not ensure healthy extreme pollution. Real-time measurements crucial effective management. offer valuable insights building administrators policymakers, helping them develop strategies mitigate support healthier environments seasons.

Язык: Английский

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Wildland fire, air pollution and cardiovascular health: is it time to focus on the microvasculature as a risk assessment tool?

Frontiers in Physiology, Год журнала: 2023, Номер 14

Опубликована: Июль 19, 2023

Climate change favors weather conditions conducive to wildland fires. The intensity and frequency of forest fires are increasing, fire seasons lengthening. Exposure human populations smoke emitted by these increases, thereby contributing airborne pollution through the emission gas particulate matter (PM). adverse health outcomes associated with exposure represent an important burden on economies systems societies. Even though cardiovascular diseases (CVDs) main cause global attributable PM exposure, it remains difficult show reliable associations between disease risk in population-based studies. Optimal requires a resilient adaptable network small blood vessels, namely, microvasculature. Often alterations this microvasculature precede occurrence outcomes, including CVD. Biomarkers microvascular could then possible markers for early detection poor outcomes. This review aims synthesize current literature gauge whether assessing can better estimate impact

Язык: Английский

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