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Now showing items 41-50 of 66
ON THE FURTHER STUDIES OF SUITABLE STORM-SCALE 3DVAR DATA ASSIMILATION FOR THE PREDICTION OF TORNADIC THUNDERSTORMS
(2011)
Storm-scale 3DVAR data assimilation and NWP for the prediction of tornadic supercell thunderstorms still faces many challenges. Some fundamental issues are still not thoroughly (or explicitly) investigated. To name a few: ...
Optimizing Lidar Scanning Strategies for Wind Energy Turbulence Measurements
(2015-05-08)
Turbulence has a significant effect on wind farm power production and turbine reliability. Since remote sensing devices, such as lidars, are commonly used in wind energy studies, the accurate measurement of turbulence with ...
ENSEMBLE KALMAN FILTER METHODS FOR CONVECTIVE-SCALE RADAR DATA ASSIMILATION AND MULTI-SCALE DATA ASSIMILATION OF THE 13 JUNE 2010 TORNADIC SUPERCELL ENVIRONMENT
(2014-08-15)
Ensemble data assimilation at convective-scales will need to solve a number of scientific and technical issues prior to being usable for operational numerical weather prediction. This research contributes to this goal by ...
The Role of Surface Drag in Supercell Tornadogenesis and Mesocyclogenesis: Studies Based on Idealized Numerical Simulations
(2017-05)
Idealized numerical simulations of supercell thunderstorms have been employed for several decades to study tornadogenesis, providing valuable insights that have helped shape our current understanding of the process. Until ...
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 ...