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 20 of 20 for “"Dust Deposition"”.
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The effect of plant surfaces on pesticidal dust deposition
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Agricultural Engineering, 1954
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The Influence of dust deposition, carbonates and erosion on the formation of Clanwilliam heuweltjies
… was firstly to determine the influence of dust deposition and carbonates on heuweltjie formation in order to gain insight into the formative process of heuweltjies. The second part of this investigation sought to further test the VPE hypothesis by examining whether erosion alone could give …
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Quantifying glacier melt enhancement due to dust deposition during the 2022 melt season. Tungnaárjökull glacier, South Iceland
… of light absorbing impurities such as mineral dust on glacier surfaces alters their reflective properties leading to a reduction in albedo, consequently increasing absorption of incoming solar radiation which further impacts the glacier surface mass balance (SMB). Icelandic glaciers portray a …
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Bacterioplankton dynamics in surface waters of the north-eastern (sub-)tropical Atlantic Ocean affected by Aeolian dust
… in terms of wind driven mixing and Aeolian dust deposition.<br/>Firstly, the region’s surface water bacterioplankton community was compared with adjacent<br/>regions in terms of metabolic activity, by measuring the uptake rates of radioactively labelled<br/>amino acids (3H-leucine and …
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Quantifying Sphagnum spp. presence and distribution along a gradient in aeolian mineral deposition in Icelandic mires
Aeolian dust deposition has been shown to affect natural ecosystems in different ways, for instance by increasing soil’s bulk density and mineral content, leading to shifts in vegetation. Due to Iceland frequent volcanic eruptions and vast sandy deserts and eroded areas, in combination with strong …
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Modelling the speciation and biogeochemistry of iron in oceanic surface waters at the Bermuda Atlantic Time-series Study site
… export. The model is forced with observed dust deposition rates, mixed layer depths, and solar radiation at the site of the Bermuda Atlantic Timeseries Study (BATS). It contains an optimised ecosystem model which yields results close to the observational data from BATS.<br/><br/>Firstly, …
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Biogeochemical niche construction in the forest-fynbos mosaic of Jonkershoek Nature Reserve, South Africa
… and carbon and nitrogen analysis. Evidence for dust deposition varied spatially, although this could be a result of the rapid erosion experienced during winter. Soil properties, mainly texture and nutrient concentration differed distinctly between forest and fynbos. I argue that these …
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The marine geochemistry of iron and iron isotopes
… dissolved Fe distributions reflect atmospheric deposition trends with colloidal Fe following dust deposition more strongly than the soluble fraction of Fe. Observed surface maxima and shallow minima in dissolved Fe were always due to variations in the colloidal Fe fraction. Deep-water dissolved …
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The effectiveness of actively accumulating dust in rejuvenating soils and ecosystems in a super-humid, high weathering and leaching environment, West Coast, South Island, New Zealand
The deposition of mineral dust is an integral component of terrestrial and marine biogeochemical cycles. Dust is recognised as an important rejuvenator by supplying nutrients and unweathered mineral material to ecosystems. While deposition rates have been regularly quantified for terrestrial …
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Effects of Climate and Ecological Processes on Engineered Uranium Disposal Cell Performance with Respect to Nearby Subsistence-Based Indigenous Communities
… years post-construction, vegetative succession, dust deposition, and soil development are changing the as-built engineering design, clearly notwithstanding the longevity standard of 200-1,000 years. Little is known about how natural ecological succession will impact the performance of …
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Toward Rapid Silica Analysis of CPDM Samples using Portable Fourier Transform Infrared Spectrometry
Continuous personal dust monitors (CPDMs) are widely used to monitor respirable coal mine dust (RCMD) to reduce miners' exposures, but they are unable to directly assess respirable crystalline silica (RCS) concentrations, which are linked to the recent rise of respiratory diseases among coal …
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The marine geochemistry of iron and iron isotopes
… dissolved Fe distributions reflect atmospheric deposition trends with colloidal Fe following dust deposition more strongly than the soluble fraction of Fe. Observed surface maxima and shallow minima in dissolved Fe were always due to variations in the colloidal Fe fraction. Deep-water dissolved …
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Mineralogical, Chemical, and Isotopic (Sr, Pb) Composition of Atmospheric Mineral Dusts in an Ombrotrophic Peat Bog, Southern South America
… excellent environmental archives of atmospheric deposition of many major and trace elements and of mineral dusts. Geochemical studies of major and trace elements, mineralogy of atmospheric dust and their radiogenic isotope compositions in the peat, provide important information about the …
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Marine Biogeochemistry Studies of Iron and Hydrogen Peroxide using Flow Injection-Chemiluminescence
… (17 pM) for the determination of dissolved iron. Dust deposition is an important source of iron to remote open ocean regions. The solubility of iron and aluminium in North Atlantic waters was assessed through an on-deck dissolution experiment. Calculated solubilities of iron released from six …
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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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Quantifying the impacts of exogenous dust inputs to watersheds using reactive transport modeling
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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Advancements in Isotopic Geolocation Tools for Insect Migration Research
… wings can be altered through the adult diet or dust deposition, making them poor candidates for geolocation but potentially interesting tools to study insect physiology, diet, or toxicology. For example, lead was found to accumulate on butterfly wings from external sources, and lead isotopes …
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The role of wind and water in shaping earth's plateaus
… volumes within the Qaidam Basin and coeval dust deposition on the Chinese Loess plateau, exemplify the importance of dust production within arid plateau environments for marine and terrestrial depositional processes, but also health issues and fertilization of soils. In the south-central …
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Reconstructing climate from the Dead Sea sediment record using high-resolution micro-facies analyses
… 1500 years comprising time series of erosion and dust deposition events was established and anchored to the absolute time-scale through 14C dating and age modelling. A particular focus of this study was the characterisation of two dry periods, from ~3500 to 3300 and from ~3000 to 2400 cal yr BP, …
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Experimental Investigations of the Onset of Sand Deposits on Hastelloy-X between 1000 C and 1100 C
… primary gas path components through erosion or deposition. Characterizing crystalline deposits on metallic substrates can allow for the prediction of deposition to improve component resilience and develop health monitoring algorithms. This work investigates the effect of temperature and angle on …