Two-wavelength lidar monitoring of stratospheric particles after Pinatubo Volcano eruption
Document ID: 362
Rau, Yi -Chung1
Philbrick, C. Russell2
1 Caelum Research Corporation. 11229 Lockwood Dr., Silver Spring, MD, U.S.A.
2 The Pennsylvania State University, Department of Electrical Engineering, University Park, PA, U.S.A.
Presented: International Geoscience and Remote Sensing Symposium (IGARSS)
Pasadena, CA., August 8-12, 1994
Abstract
Monitoring of stratospheric dust particles after the Pinatubo Volcano eruption, June 1991, has been made with a two-wavelength lidar. A novel two-wavelength particle backscattering ratio, R12, was used to observe the stratospheric particle distribution with a1titude. This ratio is defined as a ratio between the particle backscattering signal at 532 nm and the particle backscattering signal at 355 nm. Different particle groups in the atmosphere present different two-wavelength particle backscattering ratios. By observing this two-wavelength particle backscattering ratio profile, we noticed the presence of different particle groups in the stratosphere and the sedimentation of the Pinatubo volcanic particles. The changing of the two-wavelength particle backscattering ratio and wavelength dependence values at latter time are discussed.