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 size distribution"”.
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Formation of secondary organic aerosol and its processing by atmospheric halogen species – A spectroscopic study
Atmospheric aerosols play an important role in the global climate system. Through their physicochemical properties, they contribute in various ways to climate change and radiative forcing. Those properties can be considerably changed by processing the aerosols, which is especially significant for …
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A new technique to find both real and imaginary index of refraction of atmospheric aerosols from clear sky radiance measurements.
… and imaginary index of refraction of atmospheric aerosols has been developed which utilizes polarized sky radiance measurements in the solar principal plane. The technique requires that the aerosol size distribution, Rayleigh optical depth, aerosol optical depth, surface albedo, and preferably the …
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Aerosolization of Ebola Virus Surrogates in Wastewater Systems
… and the potential for the virus to be aerosolized and pose a risk of inhalation exposure has not been evaluated. We considered this risk for three wastewater systems: toilets, a lab-scale model of an aeration basin, and a lab-scale model of converging sewer pipes. We measured the …
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A STUDY OF OPTICAL, PHYSICAL AND CHEMICAL PROPERTIES OF AEROSOLS USING IN SITU MEASUREMENTS
Using a simple sampling apparatus, aerosol particles were collected on a polycarbonate substrate in various locations around the world. The focus of this study was Xianghe, China, an industrial town 70 km southeast of Beijing. The Nuclepore filters were collected in two size ranges (coarse, …
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Statistical Inverse Modelling of Aerosol Size Distributions
… uncertainty in the radiative forcing caused by aerosols is considered the main factor limiting our understanding of past and future climate changes. Some of this uncertainty is because the processes governing the aerosol dynamics are not fully known, and some uncertainty is because current …
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Formation of ozone and growth of aerosols in young smoke plumes from biomass burning
… is a major source of atmospheric trace gases and aerosols. Regional and global-scale models of atmospheric chemistry and climate take estimates for these emissions and arbitrarily "mix" them into grid boxes with horizontal scales of 10-200 km. This procedure ignores the complex non-linear chemical …
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Fibrous Membranes in Personal Protective Applications
… reduce the exposure of the respiratory system to aerosols, which may contain harmful components that can cause infection of diseases and other health problems. Mechanical protective clothing is a type of PPE that protects against bruises, cuts, and injuries from sharp objects or even ballistic …
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Constraining the representation of aerosols in GCMs: explainable AI and Lagrangian approaches to identify key drivers of the natural aerosol lifecycle.
Aerosols remain one of the largest sources of uncertainty in climate modelling, with the representation of the natural baseline significantly hampering constraint on aerosol induced radiative forcing. This thesis begins with an introduction to aerosols and their role in the climate system, as well …
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Constraining the representation of aerosols in GCMs: explainable AI and Lagrangian approaches to identify key drivers of the natural aerosol lifecycle.
Aerosols remain one of the largest sources of uncertainty in climate modelling, with the representation of the natural baseline significantly hampering constraint on aerosol induced radiative forcing. This thesis begins with an introduction to aerosols and their role in the climate system, as well …
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Microphysical retrieval of non-spherical aerosol particles using regularized inversion of multi-wavelength lidar data
… past century make a clear case of the impact of aerosols and clouds, identified as sources of largest uncertainty in climate projections. Earth’s radiation balance is altered by aerosols depending on their size, morphology and chemical composition. Competing effects in the atmosphere can be …
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Real-time Analysis of Aerosol Size Distributions with the Fast Integrated Mobility Spectrometer (FIMS)
… has emerged as an innovative instrument in the aerosol science domain. It employs a spatially varying electric field to separate charged aerosol particles by their electrical mobilities. These separated particles are then enlarged through vapor condensation and imaged in real time by a …