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ASSIMILATION OF ATTENUATED DATA FROM X-BAND NETWORK RADARS USING ENSEMBLE KALMAN FILTER
(2013)
To use reflectivity data from X-band radars for quantitative precipitation estimation and storm-scale data assimilation, the effect of attenuation must be properly accounted for. Traditional approaches try to make correction ...
Optimal Design of a Multi-scale Ensemble System for Convective Scale Probabilistic Forecasts: Data Assimilation and Initial Condition Perturbation Methods
(2014-12-12)
This dissertation research was undertaken to better understand the optimal design of convection-permitting storm-scale ensemble forecast (SSEF) systems that resolve features ranging from synoptic to convective scales. The ...
Relationships between Monthly Agroclimate Variability and Local Crop Yield in the Central and Eastern United States and Southern Canada
(2015-05-08)
Short-term agroclimate is defined here as the monthly-to-seasonal meteorological, geological, biological, and psychological factors that modulate local and regional crop yield. Modern agricultural production in the central ...
A Synoptic and Dynamic Climatology of Heavy Midlatitude Rainfall: Trends Across the United States from 1950-2009
(2010)
The increasing regularity and intensity of heavy precipitation events across the United States during the latter part of the 20th century is widely recognized. Many climate models predict continued growth in the proportion ...
Multiple Cyclic Tornado Production Modes in the 5 May 2007 Greensburg, Kansas Supercell Storm
(2011)
Long-track, violent tornadoes are rare events, but are responsible for a disproportionate majority of tornado fatalities, injuries, and property damage. It has been observed that such tornadoes are often generated as part ...
OPTIMAL DESIGN OF A CONVECTION-ALLOWING ENSEMBLE FROM A MODEL ERROR PERSPECTIVE
(2016-05-13)
As computer technology continues to improve, resources are becoming increasingly available for running an ensemble of NWP simulations with sufficient resolution that convection parameterization is no longer needed and ...
Ensemble Kalman Filter Data Assimilation in the Presence of Large Model Error
(2010)
Though assimilation of synthetically generated surface flux "observations" into numerical forecast models has been attempted, the topic of observed flux data assimilation over land has received little attention. This may ...
Analysis of environmental modifications by deep convection during the Mesoscale Predictability Experiment
(2017-05)
The Mesoscale Predictability Experiment (MPEX) conducted during the spring of 2013 included frequent coordinated sampling of near-storm environments via upsondes. These unique observations were taken to better understand ...
The Use of Polarimetric Radar Data for Informing Numerical Weather Prediction Models
(2018-05-11)
The explicit prediction of convective storms using storm-scale models has recently become a reality. Radar data is a crucial source of information about the microphysical and kinematic properties of convection at the ...
Mobile, Phased-Array, Doppler Radar Observations of Tornadoes at X Band
(2012)
Previous studies of tornadoes have utilized high-spatial-resolution data obtained by mobile Doppler radars to better understand phenomena that occur on small spatial scales. There has not been a similar focus on using ...