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.
Results
Showing 1 to 8 of 8 for “"atmospheric evolution"”.
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Understanding the Sources, Atmospheric Evolution and Radiative Effect of Brown Carbon Aerosol Particles
… to the lack of knowledge about emissions and the evolution of BrC aerosol. As part of the thesis work, the light absorption of BrC aerosol was measured with filters sampled from research aircraft during the NASA ATom mission. The aircraft flew from near surface to up to ~ 13 km altitude nearly …
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Detection and Characterization of Hot Super-Earth Exoplanets
… main research areas: surface characterization, atmospheric characterization, and planet detection. Surface characterization is explored through laboratory experiments to help explain the observed brightness (high geometric albedos) of some hot super-Earths. We design high-temperature experiments …
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Gene transfer history of carbon fixation proteins constrains marine cyanobacteria divergence times
… provide an avenue for narrowing the timing of evolutionary events in groups of cyanobacteria that are ecologically dominant in modem marine environments - groups that may have an integral role in oxygenating the Earth's atmosphere. Here I show that using concatenated phylogenies of carbon …
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Chemistry of carbonaceous aerosols : studies of atmospheric processing and OH-initiated oxidation
… information essential for understanding their atmospheric evolution and environmental effects. Samples of particulate matter < 2.5 pm in diameter (PM2.5) were collected from the Mexico City Metropolitan Area (MCMA) for both bulk compositional analysis and single particle characterization. …
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The role of C-O-H volatiles in the martian mantle and the production of the martian atmosphere.
… liquid water. The fundamental variable in the evolution of the martian atmosphere is the storage of C-O-H volatiles in the interior, and the processes and fluxes leading to ventilation of those volatiles to the atmosphere. A key constraint on the likely CO2 fluxes accompanying martian magmatism …
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Quantification of the spatial structure and temporal variability of Earth's exosphere using optical tomography
… structure of Earth's exosphere, the outermost atmospheric layer, is crucial for understanding various aspects of aeronomy and heliophysics, such as atmospheric chemistry and energetics, magnetospheric energy dissipation, ion-neutral coupling, and atmospheric evolution. Atomic hydrogen (H) is …
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The Atmospheric Fingerprints of Volcanism: Simulating Volcanic Outgassing and Secondary Atmospheres on Rocky Planets
The study of the atmospheric composition and evolution of rocky planet atmospheres is key to understanding both the conditions required to develop a habitable planet, and to analyse the link between the deep interior and atmosphere of rocky bodies. This thesis uses volcanism as a chemical link …
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Remote sensing of ion-neutral charge exchange and diffusive transport in planetary atmospheres
… variability in its composition, structure, and evolution over periods ranging from hours to years. Through the loss of water to space, these dynamic interactions affect the evolution and habitability of planets. At Earth, these interactions also drive power outages, radiation hazard to humans, …