Research

Winter Weather

  • PhD Thesis: Trees Effects on Snowpack Energetics Experiment (TESEE). Determination of the effects of Eucalyptus Pauciflora forests on atmosphere-snowpack energy flux, snow accumulation, and snow ablation in Australia's Snowy Mountains. (Ongoing)
  • Quantifying the Impact of Synoptic Weather Types on Snowpack Energy Flux in the Snowy Mountains, Australia (ongoing)
  • Meso-Gamma and Microscale Variability of Snowfall Rate Across an Airport Terminal Area. This project examined how snowfall rates change over relatively small distances because it can impact how long anti-icing fluid lasts on aircraft and whether certain types of aircraft are allowed to takeoff or land. This project was originally designed as part of the FAA's Terminal Area Icing Weather Information for NextGen (TAIWIN) program.
  • Construction of United States precipitation climatologies using extensive METAR data. The climatologies illustrate precipitation patterns, shifts in those patterns, and the effect of replacing human observes with automated precipitation type instrumentation.
  • Examination of freezing precipitation spatiotemporal variability. This project was designed as a follow-up to the snowfall rate variability work and was executed by examining a series of surface stations in the Great Lakes region.
  • Forecasting and examination of Super-cooled Liquid Water (SLW) conditions at NASA Glenn to coordinate with Twin Otter Aircraft, experimental radar, radiometer, and SLW-sonde experiments for the Radar Icing Algorithm (RadIA) program.

Instrumentation and Algorithm Design

  • Development of a freezing precipitation detection algorithm to be implemented on the Automated Surface Observing System (ASOS) stations with no alteration to the instrumentation on the system. This algorithm fills current voids in detection by automating freezing drizzle detection in addition to other freezing and frozen precipitation types.
  • Artificial snowfall randomization system added to the NCAR Snow Machine that allows for randomization of artificial snowfall through wind generation that mimics natural snowfall distribution during de-icing and anti-icing fluid testing.
  • Radar Algorithm for Nowcasting (5-30 minutes) Surface Snowfall Rates. The algorithm design uses a combination of elevated reflectivity scans and vertical wind profiles to advect snowfall reflectivities to ground level up to 30 mins in advance allowing for better response to changing conditions.
  • Management of manual snowfall measurements for NCAR Snow Machine operations improvements. This project focused on the manual measurement of snowfall LWE and anti-icing fluid failure times to address discrepancies between results in outdoor and snow machine testing. Identical tests were conducted outdoors and in the snow machine to look for discrepancies between the two and create solutions to them.

Weather Modelling

  • Creation of a surface dust emission scheme for the Weather Research and Forecasting (WRF) model microphysics system. The intention of this work was improve aerosol initialization and fluxes for better performance of forecasting microphysics based aircraft icing conditions.

Severe Weather/Convective

  • Examination of wind records from the Boulder Atmospheric Observatory (BAO) tower and NCAR Marshall Site. Researching thunderstorm outflows and Chinook wind events at various heights in the atmospheric boundary layer to allow for better wind engineering standards (Ongoing)
  • Storm chaser for UQ Hail program. Deploy instrumentation ahead of incoming storms to gather wind and hail data.
  • Management of examination of the influences of the Palmer Divide on convection. Team deployment of instrumentation along the divide and daily monitoring of convective weather to determine similarities between storm days that were attributed to the region.
  • Case Study: El Reno, Oklahoma Tornado of May 31, 2013. In-depth examination of the atmospheric conditions that led to the largest tornado on record.