115 citations · 301 across the 7 of their papers we have counts for
7 papers
Observations of a glaciating hole-punch cloud
C. D. Westbrook, O. T. Davies
Remote-sensing measurements of a hole-punch cloud or fall-streak hole are presented. The cloud was observed with a vertically pointing infrared ceilometer, Doppler lidar, sky camer…
Doppler lidar measurements of oriented planar ice crystals falling from supercooled and glaciated layer clouds
C. D. Westbrook, A. J. Illingworth, E. J. O'Connor +1
The properties of planar ice crystals settling horizontally have been investigated using a vertically-pointing Doppler lidar. Strong specular reflections were observed from their o…
Testing the influence of small crystals on ice size spectra using Doppler lidar observations
C. D. Westbrook, A. J. Illingworth
Measurements of the vertical velocity of ice crystals using a 1.5micron Doppler lidar are described. The statistics from a continuous sample of stratiform ice clouds over 17 months…
The capacitance of pristine ice crystals and aggregate snowflakes
C. D. Westbrook, R. J. Hogan, A. J. Illingworth
A new method of accurately calculating the capacitance of realistic ice particles is described: such values are key to accurate estimates of deposition and evaporation rates in NWP…
Theory and observations of ice particle evolution in cirrus using Doppler radar: evidence for aggregation
C. D. Westbrook, R. J. Hogan, A. J. Illingworth +1
Vertically pointing Doppler radar has been used to study the evolution of ice particles as they sediment through a cirrus cloud. The measured Doppler fall speeds, together with rad…
Radar scattering by aggregate snowflakes
C. D. Westbrook, R. C. Ball, P. R. Field
The radar scattering properties of realistic aggregate snowflakes have been calculated using the Rayleigh-Gans theory. We find that the effect of the snowflake geometry on the scat…