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 72 for “"tornadoes"”.
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Quantitative Investigation of the Destructive Energy in Tornadoes
Made available in DSpace on 2014-12-05T17:37:16Z (GMT). No. of bitstreams: 1 6101644.pdf: 10627450 bytes, checksum: 138aa400d2a47762050534ec83d98209 (MD5) Previous issue date: 1961
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Characteristics of tornadoes associated with land-falling Gulf Coast tropical cyclones
Tropical cyclone tornadoes are brief and often unpredictable events that can produce fatalities and create considerable economic loss. Given these uncertainties, it is important to understand the characteristics and factors that contribute to tornado formation within tropical cyclones. This thesis …
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Thermodynamic, kinematic, and radar parameters of isolated tornadoes with and without NWS warning
Tornadoes are a rapidly forming weather phenomenon that forecasters may have difficulty anticipating. A tornado warning is issued when atmospheric conditions are imminent for formation or a tornado has already formed and been confirmed. The purpose of this research was to find what, if any, …
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Non-thunderstorm-related effects on the near-surface wind field in strong tornadoes
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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“If it happened in…” a pseudo-global warming assessment of tropical cyclone tornadoes
… climate change on the production of tornadoes by tropical cyclones (TCs) making landfall in the United States Atlantic Basin. Hurricane Ivan (2004), a prolific tropical cyclone tornado (TCT)-producing storm, is the particular case under consideration. This dissertation also seeks to …
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Dynamic impact induced by tornadoes through simulations based on two-way wind-structure interactions
"Tornadoes have become a significant cause of property damage, injuries and life losses. Investigations of tornadoes indicate that most fatalities were caused by building failure. For example, in the Joplin, MO tornado of 22 May 2011, 161 people were killed, and 84% fatalities were related to …
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Wind flow characteristics of multi-vortex tornadoes and their wind effects on residential houses
"Tornadoes strike the USA very frequently, with an average of 1200 reports per year, and the average annual tornado-induced property loss has reached $10B. The devastation from recent tornadoes have prompted a renewed interest in better understanding tornado dynamics, their interactions with the …
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Weather extremes in a changing climate: analyses for extreme precipitation, severe hail, and tornadoes
This thesis is broken into three parts, examining three distinct hazards that often accompany severe thunderstorms: extreme precipitation, severe hail, and tornados. First, observational data and an ensemble of climate change model experiments (from the Coupled Model Intercomparison Project Phase 5 …
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Analysis of residential building performance in tornadoes as a function of building and hazard characteristics
Tornadoes damage and destroy many thousands of buildings per year in the United States leading to significant economic losses and long-lasting disruption to communities. In an effort to better understand the relationship between tornado wind speeds and resulting damage, multiple data sources from …
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Using statistical learning approaches to understand trends and variability of tornadoes across the continental United States
<p>The annual frequency of tornadoes during 1950-2018 across the major tornado-impacted states were examined and modeled using anthropogenic and large-scale climate covariates in a hierarchical Bayesian inference framework. Anthropogenic factors include increases in population density and better …
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Mesoscale and stormscale ingredients of tornadic supercells producing long-track tornadoes in the 2011 Alabama super outbreak
… dynamics of supercells that produce long-track tornadoes, with modeling emphasis on the central Alabama storms from April 27, 2011 - part of the 2011 Super Outbreak. While most of the 204 tornadoes produced on this day were weaker and short-lived, this outbreak produced 5 tornadoes in Alabama …
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A numerical simulation of a tornado-scale vortex in a three-dimensional cloud model
… rotating thunderstorm called a ""supercell"", tornadoes are one of the most destructive atmospheric phenomena. Tornadoes almost always have length and time scales smaller than the measurable scales within the observing network of surface stations, conventional radar, Doppler radar and …
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The numerical simulation of non-supercell tornadogenesis
… tornado is a name given to a class of tornadoes which occur with deep moist convection not displaying the strong mid-level rotation found in supercell thunderstorms. In recent years the severe storms community has acknowledged that a significant portion of the small tornadoes occurring …
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Analyses of quasi-linear convective system tornado characteristics, environments, and genesis mechanisms
… characteristics of the T&S- and H&S- associated tornadoes and their supporting environments. A combined Doppler radar, tornado report, and environment dataset was compiled for this purpose. Lastly, this research aimed to quantify National Weather Service (NWS) warning performance for both …
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Tornado Scars: The Long-term Imprints of Disaster on the Texas Urban Landscape
… contains little on the long-term imprints of tornadoes upon the built landscape. "Tornado scars" describes the long-term existence of the visual impacts and evidence of historic tornadoes upon the constructed landscape. This research on these scars presents a theoretical framework, details the …
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Design of Stick-Framed Wood Roofs Under Extreme Wind Loads
… to failure in high-speed wind events, such as tornadoes. Around 90% of all tornadoes in Canada fall in or below the EF-2 category,making it a possible target for design of wood-frame houses to be resistant to theseevents. This research proposes improved stick-framing guidelines that would work …
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Near-surface tornado wind field estimation using damage patterns
Tornadoes are considered the most violent and dangerous wind hazards and are emerging as a major public concern, causing a significant amount of property loss and casualties in the past decades. In response, the engineering community in the United States is implementing tornado-based design in …
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Controls of updraft size, cold pool characteristics, and potential tornado intensity in supercell thunderstorms
… lead to the formation of particularly intense tornadoes are modulated by updraft width. Specifically, a simple hypothesis is proposed that larger, more intense tornadoes should more readily form from wider rotating updrafts. This hypothesis is tested using idealized simulations, which reveal …
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Terrain and Landcover Effects of the Southern Appalachian Mountains on the Low-Level Rotational Wind Fields of Supercell Thunderstorms
That tornadoes cannot occur in mountains due to disruptive influences of the complex terrain is a common misperception. Multiple tornadoes occur each year in mountainous environments, including the Appalachian Mountains. Copious research examines the influences of complex terrain on large severe …
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