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Cyclic tornadogenesis and horizontal vortex tubes in high-resolution idealized simulations of supercells
(2021-12)
Despite enormous progress in our understanding of tornadic supercells obtained over the last several decades, many aspects regarding the evolution of these storms and their attendant tornadoes require further investigation. ...
Examining Environmental Conditions, Storm-scale Characteristics, and Tornado Potential in Observed and Simulated Supercell Thunderstorms
(2020-07-30)
Despite advancements in our understanding of supercell thunderstorms, numerous questions remain regarding relationships between their environment, storm-scale characteristics, and tornado potential. In particular, quantifying ...
Disentangling the relative contribution of land-atmosphere coupling toward the evolution of extreme events
(2021-05-14)
The Great Plains region is characterized by highly variable and often extreme precipitation. Devastating multi-year droughts are common in the region, and can often be followed by years of above normal precipitation. Drought ...
Effects of nesting frequency and lateral boundary perturbations on the dispersion of limited-area ensemble forecasts.
(2003)
To help restore error variance and LAM ensemble dispersion, a new method is developed to apply statistically consistent LBC perturbations that remain spatially and temporally coherent while passing through the boundaries. ...
Machine Learning Predictions of Flash Floods
(2016-08-12)
This dissertation contains a literature review and three studies concerned with the development, assessment, and use of machine learning (ML) algorithms to explore automatically generated predictions of flash floods. The ...
Observational and model analyses of the Oklahoma City urban heat island
(2014-05-09)
To date, much of the current understanding of the impacts of urban areas on atmospheric processes results from a number of field programs. Between 28 June and 31 July 2003, a vast array of instrument systems collected ...
The effects of wind shear on convective boundary layer entrainment.
(2004)
24 large eddy simulations (LES) were conducted for CBLs growing under varying conditions of surface buoyancy flux, free atmospheric stratification, and wind shear. With the intent of elucidating the effects of surface layer ...
Alterations in land surface-atmosphere processes resulting from the 1988 Greater Yellowstone Area fires.
(2004)
Meteorological observations for the 10-year period 1984 to 1993 have been collected from 178 stations within the GYA, quality assured, and spatially and temporally interpolated to produce gridded data suitable for model ...
Numerical simulation of nonlinear buoyancy waves in the lower atmosphere.
(1997)
A 2D dry incompressible vorticity-stream function model is developed and used to investigate nonlinear buoyancy waves, especially internal solitary waves and related phenomena in the lower atmosphere. Using this model some ...
Near Surface Atmospheric Impacts Resulting From a Developing Metropolitan Area
(2016-12)
Over the past century, the population of the world has become increasingly urbanized. As a result, cities have become larger and more densely populated than any time in history. This unprecedented growth and rapid modification ...