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 10 of 10 for “"surface air quality"”.
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Remote Sensing of the Lower Atmosphere: From Surface Concentration to Mixing Layer Height
… angles and main data products include near surface concentration, tropospheric column and vertical profile for different trace gases. It addresses an important gap in near surface air quality measurements that is difficult for in-situ, satellite and other remote sensing measurements to …
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Human health impacts of high altitude emissions
… are attributed annually to exposure degraded surface air quality and UV-induced skin cancer. However, the focus has been on surface emissions, and the contribution of high altitude emissions to these issues is rarely examined. In this thesis, potential links are investigated between high …
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Satellite constraints on surface concentrations of particulate matter
… effects on human health from exposure to poor air quality and the recommendations of the World Health Organization to significantly reduce PM2.5 in order to reduce these risks, better estimates of surface air quality globally are required. However, surface measurements useful for monitoring …
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Redefining “Space Sustainability” for Launch Vehicles: Forecasting the Atmospheric Impact of the Commercial Space Launch Industry in 2050
… of launch emissions on stratospheric ozone and surface air quality. We find that the black carbon emitted by kerosene and methane rockets causes an indirect increase in stratospheric ozone due to the removal of NOx, with ozone column change averaging 5.07 Dobson Units (DU) and 1.26 DU …
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Electro-aerodynamic thrust for fixed-wing aircraft propulsion
… negatively impact global climate, degrade surface air quality, and create noise. Towards mitigating these effects, this thesis considers electro-aerodynamic (EAD) propulsion, a form of in-atmosphere electrostatic propulsion, which requires no on-board propellant and has zero primary gaseous …
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Environmental and economic assessment of alternative transportation fuels
… road transport. The use of LNG as a supplemental aircraft fuel is considered in the context of the Lockheed Martin C- 1 30H and C-130J transport aircraft. We estimate the cost of retrofitting these aircraft to use LNG and the savings from reduced fuel expenses. We evaluate the societal impacts of …
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Atmospheric Pollutant Levels in Southeast Brazil During COVID-19 Lockdown: Combined Satellite and Ground-based Data Analysis
… lockdown measures are being implemented making air pollution levels go down in several countries. In this context, the air quality changes in the highly populated and trafficked Brazilian states of Sao Paulo (SP) and Rio de Janeiro (RJ) are hereby going to be addressed using a combination of …
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Stochastic Methods for Setting Effective Aviation NOₓ Policies
… are well known to have detrimental effects on air quality and the climate. Presently, they are regulated to preserve local air quality around airports. As part of the regulation process, aircraft engines are placed on a test stand with NOₓ levels measured at different thrust settings meant to …
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Sensitivities of Atmospheric Composition to High-Altitude Vehicles Emissions
… including changes in atmospheric composition and air quality, are examined in detail. Previous studies have evaluated global ozone changes and radiative forcing resulting from aviation emissions. However, they have sometimes neglected the variability due to altitude, latitude, and species, which …
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Plume to global-scale atmospheric impacts of aviation emissions
Commercial aircraft combustion emissions impact the atmospheric composition, alter the Earth’s climate by accounting for ~4% of anthropogenic radiative forcing [72, 49] and affect surface air quality, causing an estimated ~16,000 premature mortalities per year [7, 28]. These environmental impacts …