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CMAQ is a comprehensive atmospheric modeling system. This invited presentation overviews the development history and recent enhancements to the modeling system in context of its use for the following emerging air pollution issues: (1)Examination of U.S. air pollution in context o...

Deposition and accumulation of aerosol particles on photovoltaics (PV) panels, which is commonly referred to as &ldquo;soiling of PV panels,&rdquo; impacts the performance of the PV energy system. It is desirable to estimate the soiling effect at different locations and times for...

There is growing interest in understanding how maternal diet might affect the sensitivity of offspring to environmental exposures. Previous studies demonstrated that adult rat offspring (approximately 6-months-old) from dams given a high-fat diet (HFD) prior to, during, and after...

Increased availability of commercially-available low cost air quality sensors combined with increased interest in their use by citizen scientists, community groups, and professionals has resulted in a flood of journal articles summarizing their use. Even so, the US EPA's SPEAR r...

Regional, state, and local environmental regulatory agencies often use Eulerian models to investigate the potential impacts on pollutant deposition and air quality from changes in land use, anthropogenic and natural emissions, and climate. The Noah land surface model (LSM) in th...

This is a manuscript that analyzes combined heat and power (CHP)'s potential benefits within the context of the current and future evolution of the US energy system. Scenarios were developed and analyzed via a bottom-up technology model of the U.S. energy system to determine the ...

We followed soil C fluxes in a subalpine grassland system exposed to experimentally increased atmospheric N deposition for 7 years. Earlier we found that, different from the plant productivity response, the bulk soil C stock increase was highest at the medium, not the high N inpu...

This report includes proceedings from the 2013 NIEHS/EPA Children's Centers Annual Meeting, held in Washington D.C. in October, 2013. Summaries of presentations, speaker biosketches, poster abstracts, and a meeting participant list are all included.

The report includes proceedings from the 2015 NIEHS/EPA Children's Centers Annual Meeting. The proceedings include presentation summaries, speaker biosketches, poster abstracts, and a list of meeting participants.

Traditionally hazard quotients (HQs) have been computed for ecological risk assessment, often without quantifying the underlying uncertainties and variability in the risk estimate. We demonstrate a Bayesian network approach to quantitatively assess variability and uncertainties i...

A high level presentation for their senior people, lasting perhaps 45 minutes, covering a history of the protocol program, outcome focused… the why’s and how’s, and how you measure success.

Changing precursor emission patterns in conjunction with stringent health protective air quality standards, necessitate accurate quantification of non-local contributions to ozone pollution at a location due to atmospheric transport, that by nature predominantly occurs aloft noct...

Wildfire smoke contains hazardous levels of fine particulate matter (PM2.5), a pollutant shown to adversely effect respiratory and cardiovascular health. Estimating PM2.5 concentrations attributable to wildfires is key to understanding the extent to which wildfires contribute to ...

To support the goals articulated in the vision for exposure and risk assessment in the twenty-first century, we highlight the application of a thermodynamic chemical activity approach for the exposure and risk assessment of chemicals in the environment. The present article descri...

From the earliest days of public health, environmental protection has been fundamental to preventing disease and ensuring a healthy population. From John Snow and the Broad Street Pump to chlorinated drinking water in Jersey City, NJ, protecting the environment has been a core pu...

Vegetative leaf area is a critical input to models that simulate human and ecosystem exposure to atmospheric pollutants. Leaf area index (LAI) can be measured in the field or numerically simulated, but all contain some inherent uncertainty that is passed to the exposure assessmen...

Stress tests are used clinically to uncover underlying disease and predict future cardiovascular risk. Previously, we used treadmill exercise stress in rats to reveal latent effects of air pollution inhalation. Other daily stressors, when modeled experimentally, may have similar ...

The use of nudging in the Weather Research and Forecasting (WRF) Model to constrain regional climate downscaling simulations is gaining in popularity because it can reduce error and improve consistency with the driving data. While some attention has been paid to whether nudging i...

A cell culture exposure system (CCES) was developed to expose cells established at an air-liquid interface (ALI) to volatile chemicals. We characterized the CCES by exposing indigo dye-impregnated filter inserts inside culture wells to 125 ppb ozone (O3) for 1 h at flow rates of ...

Background Air pollution risk assessments often employ effect coefficients from epidemiologic studies to quantify the public health impact of changes in air quality. Partly due to data and methodological limitations, epidemiologic studies have traditionally characterized the heal...

The information in this document is from a collaborative effort between the U.S. EPA, Region 6 Superfund Division and the Office of Research and Development, National Risk Management Research Laboratory. Research was conducted at the US EPA Region 6 Addison Texas Facility. The fi...

In this paper we review the published, scientific literature addressing the response of nutrients, sediment, pathogens, and cyanobacterial blooms to historical and potential future changes in air temperature and precipitation. The goal is to document how different attributes of w...

The Model for Prediction Across Scales &ndash; Atmosphere (MPAS-A) is the meteorological foundation for a next generation global air quality modeling system currently being developed at the U.S. Environmental Protection Agency (USEPA). In recent years, meteorological fields for r...

Despite its importance to transportation safety and ecosystem health related to pollutant and nutrient deposition, the simulation of fog lags the simulation of other meteorological phenomena due in large part to its complexity and limitations of model resolution. Accordingly, th...

As emissions reductions are desired in end-use sectors –commercial/residential technologies and light- and heavy-duty vehicles – the corresponding changes in fuel use and technologies can lead to shifts in the upstream production processes. These “upstream” emissions can be assoc...