HR: 0830h
AN: SA51A-0489    [PDF]
TI: Backscatter Lidar Depolarization Study of NLC at Sondrestrom, Greenland
AU: * Pan, W
EM: weilin.pan@sri.com
AF: SRI INTERNATIONAL, 333 RAVENSWOOD AVENUE, MENLO PARK, CA 94025 United States
AU: Thayer, J
EM: thayer@sri.com
AF: SRI INTERNATIONAL, 333 RAVENSWOOD AVENUE, MENLO PARK, CA 94025 United States
AB: The spherical shape of NLC particles is often an assumed property without much scientific support. Such information would impact our understanding of NLC formation and interpreting backscatter signals. The depolarization lidar technique has been used to characterize the degree of depolarization, and thereby determine the sphericity of ice particles. During the summer of 2003, Sondrestrom Rayleigh lidar system has been operated to make depolarization measurements by discriminating the cross-polarized component from NLC backscatter signals. We will report our initial experimental results and discuss the nonspherical scattering properties of NLC particles using the T-matrix algorithm.
UR: http://www.isr.sri.com
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0320 Cloud physics and chemistry
DE: 0669 Scattering and diffraction
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3349 Polar meteorology
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting