Ph.D. Research AssistantshipStarting Spring or Fall 2018
The Atmospheric Science Group in the Department of Geosciences has an immediate
opening for a PhD student to work on problems related to atmospheric
electricity, lightning, and the turbulence kinetics of deep convection, using
two summers of data from the Kinematic Texture and Lightning Experiment, our
recent field campaign sponsored by the National Science Foundation. Data from the West Texas Lightning Mapping
provided information about the way lightning fills the volume of the
cloud, and the distribution of lightning flash sizes, which are related to the
energy dissipated by each flash. Continuous,
10s RHI data
along intersecting, perpendicular planes from the TTU Ka-band
mobile radars at 9 m range and 0.33 deg azimuthal resolution provided a novel
view of the turbulence kinetics, including the prospect of resolving the outer
length scale of turbulence in deep convection. Sounding data collected in the
near-storm environment are suitable for use in simulations of the observed
storms. Together, these data allow for the study of the fundamental processes
that couple the fluid and electrical properties, and their scale-dependent
spatiotemporal distributions, in real thunderstorms. The ideal applicant will
have an interest in the quantitative study of the fluid physics of turbulence,
linking theory to the radar observations to quantify the eddy scale kinetics.
In collaboration with others in the lightning group, we expect to find insights
concerning the eddy-scale distribution of charge and its subsequent effects on
the distribution of lightning flash sizes. Proposals for related research using
these or similar data are welcome as well. Interested applicants should contact
with any questions.
Dr. Bruning specializes in the relationships of storm electrification and lightning to the thermodynamics, microphysics, kinematics, and dynamics of thunderstorms. Observational studies of lightning facilitate knowledge transfer to forecasters in the operational use of lightning data, which is expected to to grow with the launch of the Geostationary Lightning Mapper on GOES-R. The VHF-band West Texas Lightning Mapping Array facilitates observational studies of lightning. Lightning data are typically synthesized with weather radar data to provide meteorological context.
Three research emphases characterize the current work in Dr. Bruning's group.
- Electrification's dependence on cloud microphysical conditions, including the impact of environmental thermodynamics and entrainment
- The distribution of flash sizes and electrical energy, and the role of turbulent kinematic trajectories in organizing the texture of charge
- Lightning physics during the discharge process, including processes by which optical and RF emission take place during leader steps and current flows
Together, these interests encompass the the conditions for microscale electrification, the distribution of electrical energy, and the means by which it is dissipated.
Other interests include data visualization, the Python programming language, and the history and philosophy of science.
Dr. Eric Bruning
Department of Geosciences,
Atmospheric Science Group
Texas Tech University
Lubbock, TX 79409-1053
Phone: (806) 834-3120
firstname dot lastname at ttu.edu