title: The depolarization - attenuated backscatter relation: CALIPSO lidar measurements vs. theory.
abstract: Using measurements obtained by the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite, relationships between layer-integrated depolarization ratio (delta) and layer-integrated attenuated backscatter (gamma) are established for moderately thick clouds of both ice and water. A new and simple form of the delta-gamma relation for spherical particles, developed from Monte Carlo simulations and suitable for both water clouds and spherical aerosol particles, is found to agree well with the observations. A high-backscatter, low-depolarization delta-gamma relationship observed for some ice clouds is shown to result primarily from horizontally oriented plates and implies a preferential lidar ratio - depolarization ratio relation in nature for ice cloud particles containing plates.
authors.forename: Yongxiang
authors.initials: Y
authors.lastname: Hu
authors.forename: Mark
authors.initials: M
authors.lastname: Vaughan
authors.forename: Zhaoyan
authors.initials: Z
authors.lastname: Liu
authors.forename: Bing
authors.initials: B
authors.lastname: Lin
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.forename: David
authors.initials: D
authors.lastname: Flittner
authors.forename: Bill
authors.initials: B
authors.lastname: Hunt
authors.forename: Ralph
authors.initials: R
authors.lastname: Kuehn
authors.forename: Jiangping
authors.initials: J
authors.lastname: Huang
authors.forename: Dong
authors.initials: D
authors.lastname: Wu
authors.forename: Sharon
authors.initials: S
authors.lastname: Rodier
authors.forename: Kathy
authors.initials: K
authors.lastname: Powell
authors.forename: Charles
authors.initials: C
authors.lastname: Trepte
authors.forename: David
authors.initials: D
authors.lastname: Winker