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 14 of 14 for “"Dust Events"”.
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Unraveling the Mystery of Extreme trans-Atlantic African Dust Events: Insights from Case Studies
North Africa is the world’s largest source of dust. Each summer, the Saharan Air Layer transports massive amounts of mineral dust across the Atlantic Ocean, affecting weather, climate, ecosystem, and public health across large areas. While considerable attention has been devoted to extreme events …
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A Study of Asian Dust Events Using Surface, Satellite, and Aircraft Measurements During Intex-B
<p>Asian dust events occur frequently during the northern hemisphere spring season. Some of these events can transport dust downwind to North America within 7 days’ time and turn a regional impact into one of a much larger scale. To further quantify the transpacific transport and evolution of Asian …
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Comparison of three dust sources in Iceland: Dyngjusandur, Mýrdalssandur and Sandkluftavatn
Dust, a growing concern due to its impact on ecosystems and human health, has prompted increased research and awareness. This study focuses on dust source activity in Iceland, specifically in Dyngjusandur, Mýrdalssandur, and Sandkluftavatn. These locations are known as "hot spots" for dust events. …
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Atmospheric Dynamics of Sub-Tropical Dust Storms
… Harmattan, Saudi Arabian, and Bodélé Depression dust storms. For each dust storm case study, MERRA reanalysis datasets, WRF simulated very high resolution datasets, MODIS/Aqua and Terra images, EUMETSAT images, NAAPS aerosol modelling plots, CALIPSO images, surface observations, and rawinsonde …
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Variability, origin and physical characteristics of dust aerosol in Iceland
… of the total particulate air pollution. Less industrialized and inhibited regions, such as deserts, can contribute remarkably to air pollution. Iceland is a good example of such areas. The trends in long-term dust activity in Iceland and results from the pioneer field experiments on dust …
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Determining ground-level composition and concentration of particulate matter across regional areas using the Himawari-8 satellite
… 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. ground level) concentrations, current observations are …
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Investigation of the Chemical and Physical Properties of Asian Dust and Asian Pollution Transpacific Transport During the Intex-B Field Campaign
<p>Asian dust events during INTEX-B were analyzed by using chemical and physical in situ measurements taken by instruments on board a NASA DC-8 aircraft during the INTEX-B (2006) field campaign. From this analysis, the three following scientific questions about the nature of the Asian dust events …
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Tropospheric aerosol detection over Southern Ireland using a backscatter Raman lidar
… and 0.215. Several aerosol loads due to Saharan dust particles were detected in Spring 2011 and 2012. Lidar ratio of the dust layers were determine to be between 45 and 77 sr and AOD at 532 nm during the dust events range between 0.84 to 0.494.
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Radiative Transfer in the Martian Environment: In-Situ Results from the MSL Curiosity Rover and Laboratory Experimentation on Martian Regolith and Crystalline Rock Analogs
… Images from Mars allow the amount of suspended dust near the crater floor to be estimated numerically. The atmosphere within the crater is shown to be relatively dust free compared to the amount of dust inferred in the atmospheric column, suggesting little mixing between the upper and lower …
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Metal and Metalloid Contaminants in Atmospheric Aerosols from Mining Operations
… As, Pb, Cd and other potentially toxic elements. Dust particles emitted from mining operations can accumulate in surrounding soils, natural waters and vegetation at relatively high concentrations through wind and water transport. Human exposure to the dust can occur through inhalation and, …
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Characterising South Africa’s major dust sources
… study investigates the surface controls of major dust emissions and determines the patial distribution of major dust source in South Africa. This study follows a multi-disciplinary approach where primary and secondary data were used. The main objective of the study is to determine the spatial …
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Spatio-temporal variability of aerosols in the tropics relationship with atmospheric and oceanic environments
… regions strongly influenced by increases in dust events. Spectral and composite analyses of surface temperature, atmospheric wind, geopotential height, outgoing longwave radiation, water vapor and precipitation together with the climatology of aerosols provide insight on how the variables …
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Mineral dust lofting and interactions with cold pools
Convective dust storms, or haboobs, form when strong surface winds loft loose soils in convective storm outflow boundaries. Haboobs are a public safety hazard and can cause a near instantaneous loss of visibility, inimical air quality, and contribute significantly to regional dust and radiation …
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Environmental change and soil organic carbon storage in a dust emission hotspot, Free State, South Africa
… management practices which may contribute to dust emissions and soil loss, a common symptom of land degradation. The goal of this study was to establish how the shift in land cover or land use change affects the occurrence of dust and determine the climate constraints and mitigations to crop …