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 20 of 329 for “"model simulations"”.
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Barotropic Model Simulations of Low-Frequency Variability
Unforced, subcritical nonlinear simulations fail to produce meaningful variability, indicating that forcing is necessary in maintaining the low-frequency variability in the barotropic system under subcritical condition. Stochastically forced experiments are conducted using spatially homogeneous …
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Field observations and numerical model simulations of a migrating inlet system
… in ~7 years. A field-verified Delft3D numerical model developed for this system is used to examine the hydrodynamics in the nearshore and their effect on the migrating inlet. An initial numerical experiment showed that the observed 70⁰ tidal modulation of wave direction in the nearshore was owing …
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Field observations and numerical model simulations of a migrating inlet system
… in ~7 years. A field-verified Delft3D numerical model developed for this system is used to examine the hydrodynamics in the nearshore and their effect on the migrating inlet. An initial numerical experiment showed that the observed 700 tidal modulation of wave direction in the nearshore was owing …
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Investigation of Inorganic Stratospheric Bromine using Balloon-Borne DOAS Measurements and Model Simulations
… using the 3-D CTM (Chemical Transport Model) SLIMCAT [Chipperfield98] and a 1-D photochemical model. Photochemical changes were calculated along air mass trajectories which match the balloon data with SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) …
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Terrestrial Water Storage Change Over Dryland Regions Using Observational Data and Model Simulations
… subtropical drylands. Using a process-based model, the drying trend is attributed to human interventions and climate variations. The second study is focused on disaggregating the impacts of climate variations on the declining TWS over the Tigris-Euphrates river basin by analyzing …
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Black carbon mixing state impacts on aerosol activation investigations using particle-resolved model simulations
… the representation of these processes in models are a major source of uncertainties in current climate model predictions. This dissertation focuses on studying the impact of mixing state of BC particles on cloud microphysical quantities during the early stages of cloud formation. With the …
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THE PHYSIOLOGICAL RESPONSE OF PICOPHYTOPLANKTON TO LIGHT, TEMPERATURE AND NUTRIENTS, INCLUDING CLIMATE CHANGE MODEL SIMULATIONS
… The impact of climate change in a RCP8.5 model scenario simulation was investigated. An acclimated and a dynamic photosynthesis response model reproduce the physiological response to light. Long-term damage (accumulated over days) through photoinhibition is underestimated by the dynamic …
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Improving Convective Permitting Model Simulations of Extreme Precipitation using Object-Based Tracking and Data Assimilation
… a km-scale (e.g. 1.8 km) convective-permitting model (CPM) implementation of the Weather Research and Forecasting (WRF) model in simulating MCS activity during the record-flooding period over Texas from 21 to 31 May 2015. Applying satellite-based MCS tracking and multiple precipitation datasets, …
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The Study of the Indian Ocean Response to Climatic Events Using Satellite Observations and Model Simulations
<p>The interactions of intraseasonal and interannual climate variability with surface ocean properties is an active area of research in the Indian Ocean region. Understanding how climate variations impact basin-wide salinity patterns is an important step in understanding how this variable impacts …
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Exploration of natural climate variability and changes in future events using observations, proxy data and model simulations
… or corals) with large datasets comprised of model simulations. Additionally, I utilize some of the data science and visualization techniques I produced to explore a state-of-the-art, high-resolution dataset developed by the Minnesota Climate Adaptation Partnership (MCAP) to generate …
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Study On the Basin Scale Salt Exchange In the Indian Ocean Using Satellite Observations and Model Simulations
… in the last few decades. Observational and modeling efforts are directed towards understanding the impact of intraseasonal variability and interannual variability on the monsoon variability.</p> <p>A key component of better understanding for the region is the resolving of salt transport …
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Assessment of early 20th Century climate model simulations of Antarctic Sea ice using historical commercial humpback whale catch data
… such as the Southern Ocean. The trust on climate models to produce valuable projections rely on how skilled they are in reproducing the historical climate; therefore their results require assessments against as many observations as possible to further increase their reliability. The Southern Ocean …
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Observations and Modelling of Thermospheric Dynamics at High Latitudes
… available about this region of the atmosphere, model simulations by the WACCM-X model are employed. Model simulations, along with WINDII observations, allowed describing in a great detail most of the wind wall features, as well as its impact on other altitudes and regions. One of the main goals …
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Modeling the impacts of pulsed riverine inflows on hydrodynamics and water quality in the Barataria Bay estuary
… sites. My dissertation research concerns modeling the effects of the observed and hypothetical freshwater diversion discharges on the hydrodynamics, salinity and water quality in the Barataria estuary, a deltaic estuary in south Louisiana. This estuary receives freshwater and nutrient …
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The role of historical land-cover changes as a mechanism for global and regional climate change
This paper describes the results from several modeling studies and an observational analysis as to the effect of historical land-cover change on regional and global climates. We discuss methods for determining historical vegetation change and present results from model simulations at the global and …
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Competitive Adsorption of Trace Organic Compounds by PAC in Membrane Filtration Systems
A three-component kinetic adsorption model was developed to describe competitive adsorption of a trace organic compound in the presence of NOM. NOM was simplified into two fractions: a strongly competing fraction that directly competes for adsorption sites, and a large, pore blocking fraction that …
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A mode-based metric for evaluating global climate models
Climate models are software tools that simulate the climate system and require evaluation to assess their skill, guide their development, and assist in selecting model simulations from among the many different ones available. There are a variety of methods and approaches that can be used to …
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Modeling the Dissemination of Antibiotic Resistance in Aquatic Environments
… issue worldwide. The use of watershed-scale models is popular with many other water quality issues but not in the case of antibiotic resistance. In this study, we introduce a watershed-scale bacteria fate and transport model to simulate antibiotic resistance in E. coli. This model was …
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