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Development and validation of a sodar simulator for atmospheric boundary layer characterization
(2014-05-09)
A sodar simulator capable of producing time-series data emulating sodar signals
has been developed and tested. The atmospheric elds used to populate the sodar
simulator are taken from output of a large eddy simulation ...
Forecaster Warning Decision Making with Rapidly-Updating Radar Data
(2017-12)
Phased-array radar is being considered as a potential future replacement technology for the current operational Weather Surveillance Radar 1988 Doppler system. One of the most notable differences in these weather radar ...
USING A LOW-ORDER MODEL TO DETECT AND CHARACTERIZE INTENSE VORTICES IN MULTIPLE-DOPPLER RADAR DATA
(2010)
A new multiple-Doppler radar analysis technique is presented for the objective detection and characterization of intense vortices. The technique consists of fitting radial wind data from two or more radars to a simple ...
Variability of Tropical Cyclones in the Philippines
(2014-05-09)
The massive impacts of tropical cyclones (TCs) on the Philippines are well known. This study provides an improved understanding of TC activity in the country, allowing improved risk mitigation strategies that possibly can ...
Exploring Tornadogenesis with High-Resolution Simulations Initialized with Real Data
(2012)
Despite large advances in our understanding of tornadogenesis over the past fifty years, a comprehensive dynamical understanding of the processes behind tornado formation remains elusive. The purpose of this dissertation ...
Sensitivities of 1-km Forecasts of Tornadic Supercells to Microphysics Parameterizations, Assimilated Radar Data, and Assimilation Techniques
(2016-05-13)
The aim of this study is to examine the impact of using five different microphysics parameterization schemes, including single-, double-, and triple-moment microphysics, in an efficient high-resolution data assimilation ...
Polarimetric Radar Observations and Numerical Simulations of Tornadic Debris
(2014-05-09)
Tornadic debris are critical aspects of tornado studies because airborne debris pose significant threats to life and property, and debris often dominate backscattered radar signals, causing biased Doppler velocity measurements. ...
HYBRID EN3DVAR RADAR DATA ASSIMILATION AND COMPARISONS WITH 3DVAR AND ENKF WITH OSSES AND A REAL CASE
(2017-12)
Studies have shown advantages of the hybrid ensemble-variational data assimilation (DA) algorithms over pure ensemble or variational algorithms, although such advantages at the convective scale, in the presence of complex ...
Atmospheric Moisture Transport Associated with the West African Monsoon System: An Observational Study and Evaluation of a WRF Dynamical Downscaling Simulation
(2014-05-09)
The intraseasonal variability of the low-level atmospheric moisture transport and its divergence associated with the West African monsoon (WAM) has been investigated for the 1960-2008 period using the NCEP-NCAR reanalysis ...
ASSESSMENT OF ONE-MOMENT AND TWO-MOMENT BULK MICROPHYSICS AND SPECTRAL BIN MICROPHYSICS SCHEMES USING IDEALIZED SUPERCELL SIMULATIONS AND REAL DATA CONVECTIVE-SCALE PREDICTIONS
(2019-05)
Optimal hydrometeor parameterization and their associated processes in microphysics schemes (both spectral bin and bulk) continue to evolve as these schemes attempt to match observed hydrometeor complexity. This dissertation ...