Retrieval of the Pinatubo-Aerosol Optical Depth and Microphysical Parameters from Lidar Measurements.
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概要
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Three techniques are reviewed which are presently applied to retrieve optical and microphysicalparameters of the stratospheric aerosol from lidar backscatter signals. Measurement examplesare presented to demonstrate the potential of the different methods and to documentthe stratospheric perturbation caused by the violent eruptions of Mount Pinatubo in June 1991. Lidar observations of the optical depth and microphysical properties such as the particlesurface-area concentration are needed to support model calculations performed to quantifythe influence of the volcanic aerosol on the global climate and the stratospheric ozone chemistry. The measurement examples show that the optical depth of the Pinatubo aerosol layer wasof the order of 0.1 during the first two years after the eruption. The surface-area concentrationexceeded 10 μm<SUP>2</SUP> cm<SUP>-3</SUP> which is regarded to be a threshold for a significant depletion of ozonein the lower stratosphere during the winter seasons 1992 and 1993.
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社団法人 レーザー学会 | 論文
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