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 34 for “"precipitation rates"”.
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A Model of Precipitation Rates in Kentucky, 1965-1996
Hourly precipitation data from thirty cooperative stations in Kentucky from 1965 to 1996 were used to determine the diurnal distribution of precipitation rates. Descriptive summaries for the diurnal distribution for each climate division in Kentucky and for Kentucky as a whole were calculated. In …
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Precipitation and Dissolution of Uranyl Phosphates in a Mircofluidic Pore Structure
The abiotic precipitation of uranium (U(VI)) was evaluated in a microfluidic pore structure (i.e. micromodel) to assess the efficacy of using a phosphate amendment to immobilize uranium in groundwater and mitigate the risk of this contaminant to potential down-gradient receptor sites. U(VI) was …
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A Case Study of a High-Precipitation Supercell-Bow Echo Transition on 4-5 June 2008
… of instruments to make measurements from a high-precipitation (HP) supercell-bow echo (SBE) transition during Project MOBILE. Prior to crossing the StickNet array, this HP supercell interacted and merged with a nascent supercell before transitioning into a bow echo (BE). Surface kinematic and …
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Analysis of microbes in Greenland ice cores from periods of high and low atmospheric carbon dioxide levels
… that have been deposited from the atmosphere by precipitation or on dust particles carried by the wind. The ice is deposited in sequential layers representing distinct past periods of time. Metagenomics and metatranscriptomics offer means to perform comprehensive analyses of microbial genes and …
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The role of precipitation on Bedrock Channel Incision in Kauai, HI
… with the stream power law, which relates erosion rates to drainage area, slope, and an erosional efficiency coefficient k. The value of k, however, varies with many physical factors and most of these relationships are not well quantified. This study uses a form of stream power dependent on mean …
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Fluid-rock interactions in a carbon storage site analogue, Green River, Utah
… in the absolute mineral surface reaction rates and the significance of other rate limiting steps in natural systems. This study uses the chemical evolution of groundwater from the Jurassic Navajo Sandstone, part of a leaking natural accumulation of CO2 at Green River, Utah, in the Colorado …
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Storm-wide precipitation retrievals
The monitoring of precipitation is important for scientific purposes, such as the study of world weather patterns, the development of global precipitation maps, and the tracking of seasonal and diurnal variations in precipitation rates. Over time many observation methods have been used to estimate …
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The Effects of Applied Strain and Heat Treatment on the Properties of NiTi Wire During Shape Setting
… applied strain were observed. Following theory, precipitation rates of Ni-rich phases generally increased with increased temperature (up to a certain point), time and applied strain levels. Reaction rates to achieve a particular Af might be faster than expected if the sample is under strain …
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A Model for Simulating Soil-Zone Processes at the Regional Scale
… a range of hydraulic conductivities and applied precipitation rates, MODFLOW-SZF achieved a good infiltration and interflow solution (0.014-0.052 RMSE) with only 6 grid cells and 0.11 seconds computation time compared to the 6250 grid cells and 40 seconds of computation time required for a stable …
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Remote sensing of land cover changes in the Jeffara Plain, North-West Libya
… large North African country with annual average precipitation rates of 200 nun. More than 950/0 of the country receives less than 100 mm, and as consequence, recharge of groundwater is extremely limited. Groundwater availability and quality are also vulnerable both to climate change and …
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Pairing Water Rights to Land Parcels -- Connecting the Prior Appropriations Doctrine and Croplands in the western US
… crop yields from higher temperatures, lower precipitation rates, and shifting the growing seasons. This impacts farmers and their livelihood but more broadly, the United States's food supply and economic activity. While climatic characteristics are necessary to understand how crop production …
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Evaluating the Controls of Neogene Exhumation in the Tropical Northern Andes (colombia)
… tropics of South America. To obtain exhumation rates, I used thermochronology, which is a method that records—over timescales of millions of years—the rate at which rocks located at great depths within the Earth cool as they are transported to the surface through the erosion of overlying rock …
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Ocean circulation and dynamics on the west Antarctic Peninsula continental shelf
… fluxes associated with large glacier melt and precipitation rates in the region.
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Quantifying mercury surface fluxes by combining atmospheric observations and models
… evasion fluxes in summer (related to the high precipitation rates and deposition fluxes of oxidized mercury), whereas the terrestrial ecosystem in the eastern United States is likely a net sink of Hg⁰ during summer. Third, a one-dimensional chemical transport model is built and used to simulate …
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The response of moist convection and the atmospheric general circulation to climate warming
… cloud updrafts in a warming atmosphere. The precipitation distribution in RCE is also examined. The scaling of precipitation extremes with temperature is found to be amplified by increases in the mean fall speed of hydrometeors as the atmosphere warms. The hydrometeor fall speed affects …
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Simulating and quantifying land-surface biogeochemical, hydrological, and biogeophysical processes using the Community Land Model version 4
… may act as cloud condensation nuclei to modify precipitation rates and eventually the hydrological cycle. Therefore, we were motivated to investigate these processes in different ecosystems. Specifically, this research aims to 1) to elucidate the carbon- and nitrogen-pool adjustment processes in …
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Differential Thermal Isotope Analysis: A Method for the Study of Past Climates
… at the onset of the PETM, indicating increased precipitation intensity and weathering, and implying an enhanced hydrologic cycle response to global warming, particularly at the early stages of the PETM. These results are consistent with other research indicating higher precipitation rates during …
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Spatial pattern of African Easterly Waves and their Precipitation in Northern Africa
… the spatial distribution of AEWs and their precipitation using the Tropical Easterly Waves Climatology and the Integrated Multi-satellite Retrievals for Global Precipitation Measurement (IMERG). First, a spatial filter is used to limit 2001-2021 tropical easterly waves to only waves over the …
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Palaeoceanographic conditions and palaeoproductivity changes from the sub-Antarctic island South Georgia since the late deglacial, using marine micropalaeontology and geochemistry
… of the SWW towards South Georgia, increasing precipitation rates and replenishing glaciers.<p></p>
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Modification of Precipitation in Mid-Latitude Cyclones Passing over a Coastal Mountain Range
… range, the processes producing their clouds and precipitation are modified, leading to considerable spatial variability in precipitation amount and composition. Surface, radar, and aircraft observations from the 2015-16 Olympic Mountains Experiment (OLYMPEX) field campaign and realistic, …
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