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Records 26 to 50 of 513

Oxidation and fragmentation of plastics in a changing environment; from UV-radiation to biological degradation
(JOURNAL) [Published : Dec 10, 2022]
Understanding the fate of plastics in the environment is of critical importance for the quantitative assessment of the biological impacts of plastic waste. Specially, there is a need to analyze in more detail the reputed longevity of plastics in the context of plastic degradation...
Fuel layer specific pollutant emission factors for fire prone forest ecosystems of the western U.S. and Canada
(JOURNAL) [Published : Sep 21, 2022]
Wildland fires are a major source of gases and aerosols, and the production, dispersion, and transformation of fire emissions have significant ambient air quality impacts and climate interactions. The increase in the wildfire area burned and severity across the US and Canada in r...
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 ...
Valuation of long-term coastal wetland changes in the U.S.
(JOURNAL) [Published : Jul 01, 2022]
This study estimates an ensemble of future changes in coastal wetland areas considering both sea level rise, future greenhouse gas emissions, and accretion rate uncertainty, using outputs from the National Ocean and Atmospheric (NOAA) marsh migration model.
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...
Possible Antagonism between Cladosporium cladosporioides and Microcystis aeruginosa in a Freshwater Lake during Bloom Seasons
(JOURNAL) [Published : May 17, 2022]
To ensure drinking-water safety, it is necessary to understand the factors that regulate harmful cyanobacterial blooms (HCBs) and the toxins they produce. One controlling factor might be any relationship between fungi and the cyanobacteria. To test this possibility, water samples...
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....
Development and evaluation of an advanced National Air Quality Forecasting Capability using the NOAA Global Forecast System version 16
(JOURNAL) [Published : Apr 21, 2022]
A new dynamical core, known as the Finite-Volume Cubed-Sphere (FV3) and developed at both NASA and NOAA, is used in NOAA's Global Forecast System (GFS) and in limited-area models for regional weather and air quality applications. NOAA has also upgraded the operational FV3GFS to v...
Assessment of mold contamination in hurricane-damaged homes in Houston, Texas after sanitization by volunteers
(JOURNAL) [Published : Mar 29, 2022]
The purpose of this pilot study was to evaluate the effectiveness of mold sanitation in homes that suffered hurricane-related water damage. After a home is flooded, sanitation of the structure for mold is necessary before the interior of the home can be rebuilt. In this study, ho...
A review of climate change effects on practices for mitigating water quality impacts
(JOURNAL) [Published : Mar 22, 2022]
Best Management Practices (BMPs) are used to mitigate the impacts of human activities on land and water resources. Most BMPs function via physical, chemical, and biological processes that are strongly dependent on weather and climate. Changing climatic conditions can lead to incr...
Recent Developments in Polymer Nanocomposite-Based Electrochemical Sensors for Detecting Environmental Pollutants
(JOURNAL) [Published : Jan 27, 2021]
The growth of industrial and agricultural activities has created increase in environmental pollution worldwide. Environmental pollutants are damaging to the ecosystem and lead to a variety of health issues affecting humans throughout the world regardless of their age, race, and g...
Predictive Model of Lake Photic Zone Temperature Across the Conterminous United States
(JOURNAL) [Published : Oct 18, 2021]
As the average global air temperature increases, lake surface temperatures are also increasing globally. The influence of this increased temperature is known to impact lake ecosystems across local to broad scales. Warming lake temperature is linked to disruptions in trophic linka...
Metal(loid) bioaccessibility of atmospheric particulate matter from mine tailings at Zimapan, Mexico
(JOURNAL) [Published : Jan 04, 2021]
Metal(loid)s are contaminants of concern emitted as particulate matter (PM) from several pollution sources. The objective was to characterize potential exposure from local airborne metal(loid)s in a community in proximity to mine tailings. Air samples were collected weekly at f...
Human exposure to metals in consumer-focused fused filament fabrication (FFF)/ 3D printing processes
(JOURNAL) [Published : Mar 25, 2022]
Fused filament fabrication (FFF) or 3D printing is a growing technology used in industry, cottage industry and for consumer applications. Low-cost 3D printing devices have become increasingly popular among children and teens. Consequently, 3D printers are increasingly common in h...
Estimating Base Cation Weathering Rates in the USA: Challenges of Uncertain Soil Mineralogy and Specific Surface Area with Applications of the PROFILE Model
(JOURNAL) [Published : Feb 10, 2018]
The weathering release rate of base cations (BCw) from soil minerals is fundamentally important for terrestrial ecosystem growth, function, and sensitivityto acid deposition. Understanding BCw is necessary to reduce or prevent damage to acid-sensitive natural ...
Recent Carbon Storage and Burial Exceed Historic Rates in the San Juan Bay Estuary Peri-Urban Mangrove Forests (Puerto Rico, United States)
(JOURNAL) [Published : Jun 07, 2021]
Mangroves sequester significant quantities of organic carbon (C) because of high rates of burial in the soil and storage in biomass. We estimated mangrove forest C storage and accumulation rates in aboveground and belowground components among five sites along an urbanization grad...
Extension of a gaseous dry deposition algorithm to oxidized volatile organic compounds and hydrogen cyanide for application in chemistry transport models
(JOURNAL) [Published : Aug 16, 2021]
The dry deposition process refers to flux loss of an atmospheric pollutant due to uptake of the pollutant by the Earth's surfaces, including vegetation, underlying soil, and any other surface types. In chemistry transport models (CTMs), the dry deposition flux of a chemical speci...
Assessing ecological risks from atmospheric deposition of nitrogen and sulfur to US Forests using epiphytic macrolichens
(JOURNAL) [Published : Jun 03, 2019]
Critical loads of atmospheric deposition help decision-makers identify harmful levels of air pollution. But when critical loads are exceeded, how can the accompanying environmental risk be quantified? We use epiphytic macrolichens to assess risks from nitrogen and sulfur-containi...
Volatile Organic Compound Emissions from Prescribed Burning in Tallgrass Prairie Ecosystems
(JOURNAL) [Published : Aug 14, 2019]
Prescribed pasture burning plays a critical role in ecosystem maintenance and agricultural productivity, especially in tallgrass prairie ecosystems, but can also have negative impacts on air quality. Volatile organic compound (VOC) concentrations were measured immediately downwin...
Examining the impacts of increased corn production on groundwater quality using a coupled modeling system
(JOURNAL) [Published : May 15, 2017]
This study demonstrates the value of a coupled chemical transport modeling system for investigating groundwater nitrate contamination responses associated with nitrogen (N) fertilizer application and increased corn production. The coupled Community Multiscale Air Quality Bidirect...
Sensitivity of lake thermal and mixing dynamics to climate change
(JOURNAL) [Published : Jan 19, 2015]
Warming-induced changes in lake thermal and mixing regimes present risks to water quality and ecosystem services provided by U.S. lakes and reservoirs. Modulation of responses by different physical and hydroclimatic settings are not well understood. We explore the potential effec...
Observation of Conditions Preceding Peak Indoor Air Volatile Org Compound Concentrations in Vapor Intrusion Studies
(JOURNAL) [Published : May 21, 2021]
Temporal and spatial variability of indoor air volatile organic compound (VOC) concentrations can complicate vapor intrusion (VI) assessment and decision-making. Indicators and tracers (I&T) of VI, such as differential temperature, differential pressure, and indoor radon conc...
Asthma Prevalence and Mold Levels in US Northeastern Schools
(JOURNAL) [Published : Mar 01, 2021]
Background: Asthma is among the most common chronic diseases of children in the United States (US). Mold exposures have been linked to asthma development and exacerbation. In homes, mold exposures have been quantified using the Environmental Relative Moldiness Index (ERMI) and hi...
Aqueous Elemental Mercury Production versus Mercury Inventories in the Lake Michigan Airshed: Deciphering the Spatial and Diel Controls of Mercury Gradients in Air and Water
(JOURNAL) [Published : Jan 05, 2021]
Atmospheric delivery mechanisms are the dominant pathways leading to mercury (Hg) contamination in the Upper Great Lakes, yet studies of gaseous Hg exchange between surface water and air are limited. Speciated atmospheric Hg, continuous surface dissolved gaseous Hg (DGM), profile...
Contributions of Ecosystem Services to Human Well-being in Puerto Rico
(JOURNAL) [Published : Nov 18, 2020]
Ecosystem services, including availability of greenspace, clean air, and clean water, can have benefits to human well-being, but their relative importance compared to economic or social services is often overlooked. In Puerto Rico, for example, improving community well-being, inc...