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 […]
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.
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) […]
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).