Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Ozone pollution"”.
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Summertime ozone pollution in China: Observations and Simulations
Ground-level ozone is a secondary atmospheric pollutant that damages human and vegetation health. The chemical production of ground-level ozone involves the photochemical reactions between nitrogen oxides (NOX = NO + NO2) and volatile organic compounds (VOCs). China is experiencing high levels of …
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Air quality analysis of nitrogen oxides and relationships with ozone pollution
Air pollution can harm us when it accumulates in the air in high enough concentrations. Nitrogen oxides (NOx), especially nitrogen dioxide (NO₂), are increasingly of concern due to the environmental and health problems they cause. This reviews the recent literature on the reasons and impacts of NOx …
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Quantifying the impacts of ozone pollution on the sustainability of pasture
Tropospheric ozone (O3) is a potent threat to food security. In recent years, increasing evidence suggests that ozone can have large effects on the growth and functioning of grassland species, although the responses of grassland to ozone are complex and difficult to predict. Given the global …
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A Geospatial and Machine Learning Framework for Forecasting Ground Level Ozone Pollution
… major detrimental health effects of ground-level ozone (GLO) pollution make it imperative that both policy makers and ordinary citizens have access to high accuracy, high-resolution forecasts of their local area. Recently, advancements in computing power have made it possible to apply artificial …
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Investigating variation in the response of photosynthetic traits to ozone pollution in maize
Ozone is the most damaging air pollutant to crops, currently reducing Midwest U.S. maize production by up to 10%, yet there has been very little effort to adapt germplasm for ozone tolerance. Ozone enters plants through stomata, reacts to form reactive oxygen species in the apoplast, and ultimately …
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Reducing the contribution of the power sector to ground-level ozone pollution : an assessment of time-differentiated pricing of nitrogen oxide emissions
… precursor for tropospheric (ground-level) ozone formation. Both pollutants significantly impact human health and welfare, so National Ambient Air Quality Standards (NAAQS) have been established for each. As of 2013, over 100 million people in the U.S. lived in areas with ozone …
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Modeling Interactions of Aircraft Emissions With Global and Regional Atmospheric Chemistry and Climate
… do not contribute significantly to ground level ozone pollution in the Chicago area, and are much smaller than the effects due to other emissions such as those from vehicular traffic.
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A tale of two cities : the regulation of particulate air pollution in Mexico City and Los Angeles
… and Los Angeles have employed very similar air pollution abatement programs yet their results have been disparate. Particulate and ozone pollution levels have been significantly reduced in Los Angeles but not in Mexico City. The reasons for this difference in effectiveness are specific to each …
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Les transports, la pollution atmosphérique et la santé : évolution de la gestion des émissions d'ozone par le gouvernement canadien.
… is to discuss the different types of atmospheric pollution management programs, specifically related to the problem of ozone emissions management by the federal government. Ozone pollution is of considerable concern, especially its impact on the health of the population. Transportation represents …
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The Economics Of Gasoline Regulation: Price Impacts And Consumer Costs Of Environmental Air Quality Programs
… regulations designed to combat tropospheric ozone pollution. I construct several fixed effects econometric models to assess impacts of reformulated gasoline and low volatility gasoline on retail gasoline prices and consumer costs. I estimate that reformulated gasoline has had a positive and …
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Cluster-enhanced Ensemble Learning for Mapping Surface Ozone in China
As global air quality deteriorates, ground-level ozone (O3) has gained significant attention as a major secondary pollutant. Its simulation and prediction have become key research areas. Existing studies on ozone concentration simulation and prediction primarily focus on individual urban scales, …
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Projections of Future Changes in Surface Ozone Concentrations Over the United States, Effects of Pollutant Transport, and Uncertainty Analyses
This research analyzes potential U.S. ozone changes from the present time period (1996-2000) to the mid (2048-2052) and late (2095-2099) 21 St century. Included in the analysis is a systematic evaluation of the individual and combined effects of climate change, resulting changes in biogenic …
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On potential effects from the aviation and refrigeration sectors on ozone and climate
… refrigeration sectors contribute to the global ozone budget and to climate change via emissions of relevant gases and particles, subsequently followed by a complex set of chemical and physical processes. For the refrigeration sector, iodotrifluoromethane (CF3I) and methyl iodide (CH3I) are two …
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Simulations and projections of major air pollutants over the United States and uncertainty analyses, effects of natural change and human activities
… in major air pollutants including surface ozone, particulate matter and mercury from the present (1998–2002) to the 2050 (2048–2052). The projections of future air quality consider changes in global climate, precursor emissions from anthropogenic and biogenic sources, and pollutant …
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Surface Ozone and Population Health
Atmospheric ozone is attracting ever-growing research attention, as i) stratospheric ozone depletion will expose the biosphere to stronger hazardous ultraviolet radiation, which has been emphasised in the Montreal Protocol; ii) ozone as a greenhouse gas can alter the atmospheric thermodynamics; …