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 20 of 34 for “"Emissions Inventory"”.
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Heavy-duty emissions inventory and prediction
Heavy duty vehicle emissions represent a significant portion of the mobile source emissions inventory. Accurate estimation of their contribution is essential as on-highway and non-road heavy duty diesel emissions account for at least one third of the oxides of nitrogen (NOx) in the inventory. West …
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A novel method to determine a national diesel emissions inventory
A body of data estimating the exhaust emissions from diesel commercial vehicle engines typical of the South African vehicle population was measured in an experimental programme. The core of this work was part of the recent South African Vehicle Emissions Project (VEP), a national programme …
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City of San Luis Obispo: Community and Municipal Operations 2005 Baseline Greenhouse Gas Emissions Inventory
… to consider the quantification of greenhouse gas emissions at the community level in order to develop policies and programs to reduce emissions in the future. Although local jurisdictions are not required to quantify and report emissions at this time, the AB 32 Climate Change Scoping Plan …
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Field and laboratory investigation of ozone-indoor surface reactions: secondary emissions inventory and implications for indoor air quality
… reactants and products in indoor environments. Emissions of volatile organic compounds, as a result of ozone-surface interactions, can lower an occupant's exposure to ozone, but increase indoor concentrations of odorous and carcinogenic compounds. Therefore, investigation of ozone-surface …
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Improving a priori emission estimates using network observations and a perturbed emissions ensemble: a study in Beijing
Emissions inventories are essential inputs in air quality modelling from global to local scales, but they also represent a major source of uncertainty in the simulation outputs. Uncertainties may be propagated from the underlying data used to compile the emissions inventories or they can arise from …
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Development of a rapid global aircraft emissions estimation tool with uncertainty quantification
Aircraft emissions impact the environment by changing the radiative balance of the atmosphere and impact human health by adversely affecting air quality. Many tools used to quantify aircraft emissions are not open source and in most cases are computationally expensive. This limits their usefulness …
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Inventory and prediction of heavy-duty diesel vehicle emissions
A vehicle emissions inventory is an account of emissions produced by all vehicles in an area. Many different factors can affect the emissions and the measurement of the emissions that are used to create an emissions inventory. These factors for heavy-duty diesel vehicles have been addressed and …
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Real world heavy-duty vehicle emissions modeling
Heavy-duty vehicle emissions represent a significant portion of the mobile source emissions inventory. Accurate estimation of their contribution is essential as on-highway and non-road heavy-duty diesel emissions account for at least one third of the oxides of nitrogen (NOx) in the inventory. West …
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Aircraft Greenhouse Gas Emissions during the Landing and Takeoff Cycle at Bay Area Airports
… Throughout all phases of air transit, pollutant emissions, including greenhouse gases (GHGs), are released. The goal of this study is to quantify and characterize these emissions produced from aircraft in the LTO cycle at Bay Area airports.</p> <p>FAA data was used along with the Emissions and …
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Human Health Risk Assessment for Petroleum Refining Industry of the Remaining Air Toxics after MACT I Emissions Reductions
… included compiling vertical and fugitive emissions from 2002 National Emissions Inventory for sources inside two facilities in Louisiana, 'Motiva Norco' and 'Valero St. Charles' refineries. Six cases were modeled applying EPA criteria, where cancer risks are 'low' if the probability is. …
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AI-Based Framework for Identifying Wood Burning Appliances through Chimney Recognition
… inventories such as the U.S. National Emissions Inventory (NEI). To address this limitation, we proposed a novel computer vision framework that leverages visible chimney features as proxies for wood stove usage. Using data from drones, vehicle-based videos across urban and rural areas, …
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Real-time measurement of oxides of nitrogen from heavy-duty diesel engines
New emissions regulations and performance requirements imposed on modern diesel engines encourage the development of improved tools for emissions measurements. This study investigated one of the improved tools for NOx emissions measurement. Objectives of this thesis included measurement, comparison …
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Mercury emissions inventories in the Lake Superior states
… local, national, and global efforts to track emissions, one key complication to accurately estimating atmospheric mercury is the disagreement between the two national EPA inventories, the National Emissions Inventory (NEI) and Toxics Release Inventory (TRI), which differ in both location and …
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Uncertainties in estimates of the oxidative capacity of the urban atmosphere : a modeling and measurement approach
Mobile emissions represent a significant fraction of the total anthropogenic emissions burden in megacities and have a deleterious effect on air quality at local and regional scales. Due to the significant sources of uncertainties involved during the estimation of mobile emissions, an adequate …
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An assessment of the health implications of aviation emissions regulations
… of the health implications of aviation emissions regulations is made by assessing the results of a study of aviation's effects on United States air quality mandated by the Energy Policy Act of 2005. The Energy Policy Act study results estimated that aviation is responsible for 160 yearly …
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A Dynamic Spatial Microsimulation Model for Irish Agricultural Emissions
… a spatially disaggregated profile of resultant emissions. Following the establishment of a baseline spatial agricultural emissions inventory, a dynamic microsimulation model is developed and is used to simulate agricultural activity forward in time to provide an estimation of future emissions …
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Climate impact of aviation NOx̳ emissions : radiative forcing, temperature, and temporal heterogeneity
Aviation NOx emissions are byproducts of combustion in the presence of molecular nitrogen. In the upper troposphere, NOx emissions result in the formation of O₃ but also reduce the lifetime of CH4 , causing an indirect reduction in the formation of O₃. Meta studies by Lee et al. and Prather et al. …
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An air pollution model for complex terrain
… accepts as input the matrics from WIND, a source emissions inventory for the region, and a sequence of meteorological conditions. It produces estimates of pollution concentrations at each point in the region at several vertical elevations over time. This data can then be processed by a general …
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Past, present, and future climate impacts of aviation
… radiative forcing due to its CO₂ and non-CO₂ emissions. As the industry grows faster than its efficiency improvements, aligning its growth with international climate goals becomes increasingly urgent and challenging. To enable data-driven decision-making, this thesis investigates aviation’s …
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Measurement and deduction of emissions of short-lived atmospheric organo-chloride compounds
… Now that controls have been put in place to curb emissions of longer lived halocarbons through the Montreal Protocol, and speculation about the safety of many short-lived chlorinated organic molecules has been raised, there has been more consideration given to the efforts aimed at determining the …
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