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Air Research Products in the Science Inventory

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Records 1 to 25 of 223

A web-based tool for assessing the condition of benthic diatom assemblages in streams and rivers of the conterminous United States
(JOURNAL) [Published : Jan 04, 2022]
We used a data-driven approach in which all-possible combinations of 2-7 metrics were compared for three measures of performance. After ranking the best-performing MMIs, we selected the final MMIs by evaluating stress-response relations in independent regional datasets of diatom ...
The extent to which soil hydraulics can explain ecohydrological separation
(JOURNAL) [Published : Oct 30, 2022]
The degree of water mixing in the critical zone is under intense debate. Field measurements of isotope ratios indicate varying degrees of separation between pools of water that supply streams and vegetation. The exact physical mechanisms behind ecohydrologic separation are unknow...
Beyond Particulate Matter Mass: Heightened Levels of Lead and Other Pollutants Associated with Destructive Fire Events in California
(JOURNAL) [Published : Oct 18, 2022]
Abstract: As the climate warms, wildfires are increasing in size and intensity, posing a risk to human health and sensitive ecosystems. Studies have reported on particulate matter (PM) in wildfire smoke; however, the chemicals associated with PM, including toxic metals, have rece...
Nitrogen and Sulfur Deposition Reductions Projected to Partially Restore Forest Soil Conditions in the US Northeast, While Understory Composition Continues to Shift with Future Climate Change
(JOURNAL) [Published : Sep 05, 2022]
We used a dynamic soil-vegetation model (ForSAFE-Veg) to simulate responses to future scenarios of atmospheric deposition and climate change across 23 Northeastern hardwood stands. Specifically, we simulated soil percent base saturation, acid neutralizing capacity (ANC), nitrate ...
Ocean acidification but not nutrient enrichment reduces grazing and alters diet preference in Littorina littorea
(JOURNAL) [Published : Aug 15, 2022]
Ocean acidification and eutrophication have direct, positive effects on the growth of many marine macroalgae, potentially resulting in macroalgal blooms and shifts in ecosystem structure and function. Enhanced growth of macroalgae, however, may be controlled by the presence of gr...
Modeled vegetation community trajectories: Effects from climate change, atmospheric nitrogen deposition, and soil acidification recovery
(JOURNAL) [Published : Jul 28, 2022]
Forest understory plant communities in the United States are diverse and often sensitive to changes in climate and atmospheric inputs of nitrogen (N) caused by air pollution. Recently, understory vegetation response functions (expressed as Probability of Occurrence of Plant Speci...
Modeling Streamflow and Water Quality Sensitivity to Climate Change and Urban Development in 20 U.S. Watersheds.
(JOURNAL) [Published : Oct 01, 2015]
Watershed modeling in 20 large, United States (U.S.) watersheds addresses gaps in our knowledge of streamflow, nutrient (nitrogen and phosphorus), and sediment loading sensitivity to mid-21st Century climate change and urban/residential development scenarios. Use of a consistent ...
A harmonized chemical monitoring database for support of exposure assessments
(JOURNAL) [Published : Jun 11, 2022]
Direct monitoring of chemical concentrations in different environmental and biological media is critical to understanding the mechanisms by which human and ecological receptors are exposed to exogenous chemicals. Monitoring data provides evidence of chemical occurrence in differe...
The Role of Hepatic Vagal Tone in Ozone-induced Metabolic Dysfunction in the Liver
(JOURNAL) [Published : Jun 01, 2021]
  Air pollution has been associated with metabolic diseases and hepatic steatosis-like changes. We have shown that ozone alters liver gene expression for metabolic processes through neuroendocrine activation. This study aimed to further characterize ozone-induced changes and...
Comprehensive evaluations of diurnal NO2 measurements during DISCOVER-AQ 2011: effects of resolution-dependent representation of NOx emissions
(JOURNAL) [Published : Jul 23, 2021]
Nitrogen oxides (NOx=NO2NO2) play a crucial role in the formation of ozone and secondary inorganic and organic aerosols, thus affecting human health, global radiation budget, and climate. The diurnal and spatial variations in NO2 are functions of emissions, advection, deposition,...
Climate Change Shrinks and Fragments Habitats for Salmon in a Snow-Dependent Region
(JOURNAL) [Published : Jun 28, 2022]
Climate change threatens biodiversity through global alteration of habitats, but efficient conservation responses are often hindered by imprecise downscaling of impacts. Besides thermal effects, warming also drives important ancillary environmental changes, such as when river hyd...
Spatiotemporal variability in Swedish lake ecosystems
(JOURNAL) [Published : Mar 21, 2022]
Studying ecosystem dynamics is critical to monitoring and managing linked systems of humans and nature. Due to the growth of tools and techniques for collecting data, information on the condition of these systems is more widely available. While there are a variety of approaches f...
How deep to dig: effects of web-scraping search depth on hyperlink network analysis of environmental stewardship organizations
(JOURNAL) [Published : Jun 06, 2022]
Social network analysis (SNA) tools and concepts are essential for addressing many environmental management and sustainability issues. One method to gather SNA data is to scrape them from environmental organizations’ websites. Web-based research can provide important opport...
Using Carbon, Nitrogen, and Mercury Isotope Values to Distinguish Mercury Sources to Alaskan Lake Trout
(JOURNAL) [Published : Apr 12, 2022]
Lake trout (Salvelinus namaycush), collected from 13 remote lakes located in southwestern Alaska, were analyzed for carbon, nitrogen, and mercury (Hg) stable isotope values to assess the importance of migrating oceanic salmon, volcanic activity, and atmospheric deposition to fish...
Linking multi-media modeling with machine learning to assess and predict lake chlorophyll a concentrations
(JOURNAL) [Published : Dec 13, 2021]
Eutrophication and excessive algal growth pose a threat on aquatic organisms and the health of the public, environment, and the economy. Understanding what drives excessive algal growth can inform mitigation measures and aid in advance planning to minimize impacts....
Regional patterns and drivers of total nitrogen trends in the Chesapeake Bay watershed: Insights from machine learning approaches and management implications
(JOURNAL) [Published : Apr 09, 2022]
Nutrient enrichment is a major issue to many inland and coastal waterbodies worldwide, including Chesapeake Bay. River water quality integrates the spatial and temporal changes of watersheds, thus monitoring forms the foundation for disentangling the effects of anthropogenic inpu...
Cytotoxicity and Oxidative Stress Induced by Atmospheric Mono-Nitrophenols in Human Lung Cells
(JOURNAL) [Published : May 15, 2022]
Nitrophenols (NPs) are hazardous pollutants found in various environmental matrices, including ambient fine particulate matter (PM2.5), agricultural residues, rainwater, wildfires, and industrial wastes. This study showed for the first time the effect of ...
Emissions of Carbonaceous Particulate Matter and Ultrafine Particles from Vehicles—A Scientific Review in a Cross-Cutting Context of Air Pollution and Climate Change
(JOURNAL) [Published : Apr 02, 2022]
Airborne particulate matter (PM) is a pollutant of concern not only because of its adverse effects on human health but also on visibility and the radiative budget of the atmosphere. PM can be considered as a sum of solid/liquid species covering a wide range of particle sizes with...
Integrating high-resolution coastal acidification monitoring data across seven United States estuaries
(JOURNAL) [Published : Aug 19, 2021]
Beginning in 2015, the U.S. EPA’s National Estuary Program (NEP) started a collaboration with partners in seven estuaries along the East Coast (Barnegat Bay; Casco Bay), West Coast (Santa Monica Bay; San Francisco Bay; Tillamook Bay), and the Gulf of Mexico (GOM) Coast (Tam...
Community Science for Coastal Acidification Monitoring and Research
(JOURNAL) [Published : Jul 26, 2021]
Ocean and coastal acidification (OCA) present a unique set of sustainability challenges at the human-ecological interface. Extensive biogeochemical monitoring that can assess local acidification conditions, distinguish multiple drivers of changing carbonate chemistry, and ultimat...
A Comparative Study of Two-way and Offline Coupled WRF v3.4 and CMAQ v5.0.2 over the Contiguous U.S.: Performance Evaluation and Impacts of Chemistry-Meteorology Feedbacks on Air Quality
(JOURNAL) [Published : Nov 26, 2021]
The two-way coupled Weather Research and Forecasting and Community Multiscale Air Quality (WRF-CMAQ) model has been developed to more realistically represent the atmosphere by accounting for complex chemistry–meteorology feedbacks. In this study, we present a comparative an...
Synthesis and Hydrolysis of Atmospherically Relevant Monoterpene-Derived Organic Nitrates
(JOURNAL) [Published : Nov 02, 2021]
The partition of gas-phase organic nitrates (ONs) to aerosols and subsequent hydrolysis are regarded as important loss mechanisms for ON species. However, the hydrolysis mechanisms and the major factors controlling the hydrolysis lifetime are not fully understood. In this work, w...
Anaerobic digestate management, environmental impacts, and techno-economic challenges
(JOURNAL) [Published : Mar 01, 2022]
Digestate is a nutrient-rich by-product from organic waste anaerobic digestion but can contribute to nutrient pollution without comprehensive management strategies. Some nutrient pollution impacts include harmful algal blooms, hypoxia, and eutrophication. This contribution explor...
Self-Reported Effects of the Covid-19 Pandemic on Stewardship Organizations and Their Activities in Southeast New England, USA
(JOURNAL) [Published : Jan 06, 2022]
In many communities, regions, or landscapes, there are numerous environmental groups working across different sectors and creating stewardship networks that shape the environment and the benefits people derive from it. The make-up of these networks can vary, but generally include...
The Dynamicity of Acute Ozone-Induced Systemic Leukocyte Trafficking and Adrenal-Derived Stress Hormones
(JOURNAL) [Published : Jun 30, 2021]
Ozone exposure induces neuroendocrine stress response, which causes lymphopenia. It was hypothesized that ozone-induced increases in stress hormones will temporally follow changes in circulating granulocytes, monocytes- and lymphocyte subpopulations. The goal of this study was to...