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 11 of 11 for “"Aerosol composition"”.
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Investigating Aerosol Composition with Low Cost Optical Particle Counters
… work explores a novel method to generate basic compositional data for ambient PM with low-cost, easily deployable apparatuses in concert with a simple fully connected neural net. Simulated effects of thermal denuders as well as dryers/humidifiers are used to perturb aerosols before they enter …
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Aerosol-Cloud interactions : a new perspective in precipitation enhancement
… and human activity modified the atmospheric aerosol composition and size-distribution during the last several decades. This has affected the structure and evolution of clouds, and precipitation from them. The processes and mechanisms by which clouds and precipitation are modified by changes …
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Improving model representations of black carbon using a particle-resolved aerosol model
… to activate, their morphology and chemical composition are altered soon after emission by condensation of semi-volatile gases and coagulation with pre-existing particles. This transformation in black carbon's characteristics, termed ``aging"", increases particles' susceptibility to cloud …
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Impacts of long-range transport of biomass burning on air quality in Texas.
… BB2) were identified at Port Aransas. Several aerosol- and gas-phase BB tracers were evaluated to identify and characterize these long-range transported BB events in an industrialized location. The aerosol composition and optical properties exhibited good agreement with the BB designation, …
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Investigating the pH of atmospheric fine particles and implications for atmospheric chemistry
… but poorly understood quantity that affects many aerosol processes and properties, including aerosol composition and toxicity. In this study, particle pH and water (which affects pH) are predicted using a thermodynamic model and measurements of RH, T, and inorganic gas and particle species. The …
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Atmospheric chemistry and aerosol associated with the coastal urban environment
… the dynamics of atmospheric secondary organic aerosol (SOA) in Houston, Texas. It (1) explores the relationship between sea breeze and air quality, (2) investigates the spatiotemporal characteristics of aerosols and SOA formation rates, and (3) analyzes factors that impact new particle …
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Enabling Routine Chemical Composition and Volatility Distribution Measurements of Aerosols
Traditional online measurements of the chemical composition and other physicochemical properties (such as volatility and oxygenation) of particulate matter have relied on expensive and complex research-grade instrumentation based on mass spectrometry and/or chromatography. However, routine …
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Determining ground-level composition and concentration of particulate matter across regional areas using the Himawari-8 satellite
Speciated ground-level aerosol concentrations are required to understand and mitigate health impacts from dust storms, wildfires and other aerosol emissions. Globally, surface monitoring is limited due to cost and infrastructure demands. While remote sensing can help estimate respirable (i.e. …
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Improving Our Understanding of Atmospheric Aerosols and Their Climate Effects: Implications for Satellite Retrievals and GCM Simulations
… on improving our understanding of atmospheric aerosols using both observational data and model simulations. EOF analysis of Aerosol Index (AI) product from Total Ozone Mapping Spectrometer (TOMS) and Ozone Monitoring Instrument (OMI) reveals global distribution of absorbing aerosols, with major …
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Uncovering the Potential of Utilising Terrestrial Biogenic Markers in Ice Cores as Proxies to Past Environmental Conditions
… a wealth of information. Secondary organic aerosols (SOAs) and their biogenic volatile organic compound (BVOC) precursors are intrinsically linked to atmospheric chemistry, climate control, and land use. These relationships have the potential to inform our knowledge on the reconstruction of …
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Investigating the Molecular Composition of Rainwater and Secondary Organic Aerosol using Ultra-High Resolution Mass Spectrometry
… complete molecular characterisation of organic aerosol. However atmospheric aerosol often has complex, mixed organic and inorganic composition and soft ionisation techniques that have been developed to ionise organic aerosol specifically, are susceptible to salt suppression effects and …