Evidence for eddy-scale control of lightning flash sizes using the West Texas Lightning Mapping Array and TTUKa radars
This study presents data from field trials with the TTU Ka-band mobile doppler radars and the West Texas Lightning Mapping Array (WTLMA). Intersecting vertical cross sections from the radars (every 10 s at 0.33 deg beamwidth and ~12 m gate spacing) clearly resolved the turbulent kinematics, as seen in both the texture of Doppler velocities and values of spectrum width. Trackable patterns in time series of those fields appeared to provide additional signal about the atmospheric fluid's motion. More turbulent regions tended to have the smallest flashes, and vice versa. These data are being used to refine plans for The Kinematic Texture and Lightning (KTAL) Experiment, which will be conducted in 2015-16 to formally quantify the turbulent kinematics and test for their covariance with flash sizes mapped by LMAs.