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Rationale & Objectives: Wildfire smoke is associated with short-term respiratory outcomes including asthma exacerbation in children. As investigations into developmental exposure to wildfire smoke exposure (WSE) on children’s longer-term respiratory health are sparse, w...

Wildfire smoke risks are not uniformly distributed across people and places, and the most vulnerable communities are often disproportionately impacted. This study develops a Community Health Vulnerability Index (CHVI) using three major vulnerability components: adaptive capacity,...

Despite decades of emission control measuresaimed at improving air quality, Los Angeles (LA) continues toexperience severe ozone pollution during the summertime. Weincorporate cooking volatile organic compound (VOC) emissionsin a chemical transport model and evaluate it against o...

A portion of Alaska’s Fairbanks North Star Borough was designated as nonattainment for the 2006 24 h fine particulate matter 2.5 µm or less in diameter (PM2.5) National Ambient Air Quality Standards (NAAQS) in 2009. PM2.5 NAAQS exceedances in Fairbanks mainly occur du...

Wildland fire (i.e., prescribed fire and wildfire) smoke exposure is an emerging public health threat, in part due to climate change. Previous research has demonstrated disparities in ambient fine particulate matter (PM2.5) exposure, with Black people, among others, exposed to hi...

This study investigated the effect of relative humidity (RH) on the chemical composition of gas and particle phases formed from the photooxidation of 1,3-butadiene (13BD) in the presence of NOx under acidified andnon-acidified seed aerosol. The experiments were conducted in a 14....

As the number of methods for assessing air pollution exposure proliferate there is a need to understand the utility of these metrics (and their uncertainties) for characterizing exposures in determining potential public health outcomes at different spatial and temporal resolution...

With the increase in acres burned from wildfire over the last few decades, wildfire smoke is an increasing global public health threat. To date, wildfire smoke research, risk communication, and public health action has focused on short-term (or daily) smoke exposures. However, th...

Climate change factors and expanded population growth in the Wildland Urban Interface (transition zone between human structures and undeveloped wildland) contribute to a projected increase in wildfire frequency and smoke exposure. As an unregulated source of air pollution, reduci...

Urban ozone (O3) pollution correlates with temperature, and higher O3 often occurs during heatwaves, threatening public health. However, limited data on how anthropogenic volatile organic compound (AVOC) precursor emissions vary with temperature hinders understanding their i...

Dry deposition of atmospheric aerosols in large-scale models is a critical, but highly uncertain, sink process with a strong dependence on particle size, meteorological conditions, and land surface properties. This study investigates the particle dry deposition scheme implemented...

We used EPA’s ecohydrology model, Visualizing Ecosystem Land Management Assessments (VELMA), to 1) conduct a performance-tested synthesis of long-term Konza Prairie Biological Station (KPBS) experimental data capable of describing the interactive effects of climate, fire, g...

Exposures to airborne allergenic pollen have been increasing under the influence of changing climate. A modeling system incorporating pollen emissions and atmospheric transport and fate processes has been developed and applied to simulate spatiotemporal distributions of two major...

Green-blue-grey infrastructure (GBGI) offers environmental benefits in urban areas, yet its impact on air pollution is under-researched, and the literature fragmented. This review evaluates quantitative studies on GBGI's capability to mitigate air pollution, compares their specif...

This is an invited commentary by the journal - Proceedings of the National Academy of Sciences of the United States of America (PNAS) on a paper they recently accepted examining longer duration wildfire smoke exposure and mortality.  This commentary focuses on highlighting t...

Dry deposition of aerosols from the atmosphere is an important but poorly understood and inadequately modeled process in atmospheric systems for climate and air quality. Comparisons of currently used aerosol dry deposition models to a compendia of published field measurement stud...

Atmospheric deposition of nitrogen (N) and sulfur (S) compounds from human activity has greatly declined in the United States (US) over the past several decades in response to emission controls set by the Clean Air Act. While many observational studies have investigated spatial a...

Comparison of lightning flash data from the National Lightning Detection Network (NLDN) and from the World Wide Lightning Location Network (WWLLN) over the contiguous United States (CONUS) for the 2016–2018 period reveals temporally and spatially varying flash rates that wo...

Carbon dioxide and non-greenhouse gas air pollutants are emitted from many of the same sources. Decarbonization actions thus typically yield air pollutant emission reductions, resulting in significant air quality benefits. Although several studies have highlighted this connection...

Atmospheric deposition of nitrogen (N) and sulfur (S) alter tree demographic processes via changes in nutrient pools, soil acidification, and biotic interactions. Previous work established tree growth and survival response to atmospheric N and S deposition in the conterminous Uni...

2-Methyltetrols and C5H10O3 compounds, referred to as “C5-alkene triols,” are chemical tracers used to estimate isoprene-derived epoxydiol (IEPOX) contributions to atmospheric PM2.5. For nearly two decades, “C5-alkene triol” molecular structures and P...

The lightning assimilation (LTA) technique in the Kain–Fritsch convective parameterization in the Weather Research and Forecasting (WRF) model has been updated and applied to continental and hemispheric simulations using lightning flash data obtained from the National Light...

Soil dry surface layer (DSL) thickness is often considered a key parameter for land surface resistance to gas exchange. Commonly used, simple models for DSL thickness are typically empirical in nature and based on limited observational evidence. Laboratory experiments were perfor...

In the pursuit of carbon neutrality, China’s 2060 targets have been largely anchored in reducing greenhouse gas emissions, with less emphasis on the consequential benefits for air quality and public health. This study pivots to this critical nexus, exploring how China&rsquo...

Now more than ever, complex socio-ecological challenges require timely and integrated responses from scientists and policymakers. Air quality is one such challenge. Under the Clean Air Act, the U.S. Environmental Protection Agency establishes ambient air quality standards to prot...