School of Meteorology (Defense)

“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, […]

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.

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).