Tim Supinie – April 24
Four-Dimensional Ensemble Kalman Filter Assimilation of High Temporal Resolution Phased Array Radar Data With Real Convective Storm Cases Tim Supinie Friday, April 24th 2:00 PM CDT Join Zoom Meeting https://oklahoma.zoom.us/j/592764373?pwd=bkMySkU2bEorWDVjSytqanhRNXF6dz09 Zoom Meeting ID: 592 764 373 Password: 423984 With the US National Weather Service (NWS) Weather Surveillance Radar-1988 Doppler (WSR-88D) radar network […]
Ryan Lagerquist- April 8
Using Deep Learning to Improve Prediction and Understanding of High-impact Weather Ryan Lagerquist Wednesday, April 8th 11:00 am https://oklahoma.zoom.us/j/822210097 Zoom password: 596031 I describe the application of convolutional neural networks (CNN), a type of deep-learning method, to high-impact weather. CNNs are specially designed to learn directly from spatial grids, which improves both skill and interpretability. […]
Daniel Tripp- Nov 12
Name: Daniel Tripp Title: AN ASSESSMENT OF OKLAHOMA WINTER WEATHER THROUGH THE HIGH-RESOLUTION LENS OF UNMANNED AERIAL VEHICLES Location: NWC 5600 Date: 2019/11/12 Time: 2:30 PM Series: MASTERS THESIS DEFENSE Abstract: Winter weather can lead to power grid failures, disruption of transportation, and can impact the local economy. Specifically in the southern Great Plains, short term […]
Xu Lu- Oct 21
School of Meteorology (Defense) Improving High-Resolution Tropical Cyclone Prediction using a Cycled, GSI-Based Hybrid Ensemble-Variational Data Assimilation System for HWRF with Vortex Scale Observations Xu Lu Monday, October 21st 2:00 pm/NWC 5600 A GSI-based, continuously cycled, dual-resolution hybrid EnKF-Var DA system is developed for the HWRF Model. The newly developed DA system is then […]
Briana Lynch- Thesis Defense – Aug 27
“The Influence of Urban Form and Vegetation on Near-Source Dispersion in a Realistic Urban Canopy” NWC 5600 ABSTRACT: The atmospheric boundary layer controls many interactions within the troposphere from larger scale atmospheric features to land-atmospheric interactions. The urban boundary layer is the layer above an urban area that is heavily impacted by what happens below, […]
Marcus Johnson- April 30th
Assessment of One-Moment and Two-Moment Bulk Microphysics and Spectral Bin Microphysics Schemes using Idealized Supercell Simulations and Real Data Convective-Scale Predictions 04/30/2019 10 AM NWC 4140. Abstract: 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 […]
Madeline Frank-School of Meteorology (Defense)
Even though the observed amplified warming trend in the Arctic region is well-established in theory through climate feedbacks and reproduced in global climate model projections, the same global climate models underestimate the corresponding decline in Arctic sea ice extent. Even some of the most sophisticated global climate models do not reproduce the observed characteristics or trends in present day Arctic cyclones.
Vivek Mahale – March 29
Analysis of the Dynamics and Microphysics of a Wet Downburst Case Using Dual-Polarization Radar Data 11 AM/NWC 4140 A significant, wet downburst affected Norman, Oklahoma, on 14 June 2011. Surface winds in excess of 35 m s-1 (>80 mph) and hailstones in excess of 4 cm diameter occurred during the downburst. The polarimetric S-band (~11.09 cm) […]
Nick Szapiro-March 12-School of Meteorology (Defense)
Towards furthering understanding and extending predictions of the polar environment, this thesis explores the variability in Arctic summer sea ice driven by coherent upper-level potential vorticity anomalies common in the Arctic termed tropopause polar vortices (TPVs).
Qingyu Wang-December 6 Defense
Atmospheric Variations in Column Integrated CO2 on Synoptic and Seasonal Time Scale over the U.S.