title: Backscattering linear depolarization ratio measurements of mineral, sea-salt, and ammonium sulfate particles simulated in a laboratory chamber.
abstract: The backscattering linear depolarization ratios of major types of tropospheric aerosol particles (Asian and Saharan mineral dust, sea salt, and ammonium sulfate) were measured using a laboratory chamber for interpreting the polarization lidar measurement of tropospheric aerosols. The values obtained from Asian and Saharan mineral particles were 0.39 +/- 0.04 to 0.05 (mean +/- standard deviation) for a high number of concentrations in the supermicrometer range and 0.17 +/- 0.03 to 0.14 +/- 0.03 in the submicrometer range. The values were 0.08 +/- 0.01 for sea-salt crystals, 0.04 +/- 0.003 for ammonium sulfate crystals, and 0.01 +/- < or = 0.001 for both liquid droplets in the submicrometer range. These values can serve as a reference for estimating aerosol type using lidar measurement.
authors.affiliation: Meteorological Research Institute, Japan Meteorological Agency, 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan. tetsu@mri-jma.go.jp
authors.forename: Tetsu
authors.initials: T
authors.lastname: Sakai
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Nagai
authors.forename: Yuji
authors.initials: Y
authors.lastname: Zaizen
authors.forename: Yuzo
authors.initials: Y
authors.lastname: Mano