Vol. 34, issue 12, article # 7

Abstract:

Multiple scattering in cirrus clouds occurring in lidar sensing of the atmosphere is studied in Monte-Carlo simulation with the use of model phase functions appropriate to crystal cloud particles of 20–100 mm in size. Critical analysis of some common methods for multiple scattering correction in cirrus clouds is presented. Sensing of cirrus clouds and stratosphere aerosol from the Earth surface with signal calibration at 30 km is numerically simulated. A significant deformation of the altitude profile of the backscattering coefficient at cirrus clouds and above without multiple scattering correction is shown, meanwhile the error in the optical depth of clouds is small. An iteration multiple scattering correction procedure is suggested and verified in numerical simulations. The comparison between the simulation and experimental data is performed.

Keywords:

cirrus clouds, stratosphere, lidar sensing, multiple scattering

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