Atmospheric temperature dependence of the aerosol backscattering coefficient |
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Institution: | 1. Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;2. School of Atmospheric Sciences, Nanjing University, Nanjing 210093, China;3. Department of Mechanical and Manufacturing Engineering, University of Calgary, AB T2N 1N4, Canada |
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Abstract: | In extracting vertical profiles of aerosol backscattering coefficient from lidar signals, the effects of atmospheric temperature are usually ignored. In this study, these effects are analyzed using a rotational Raman–Mie lidar system, which is capable of simultaneously measuring atmospheric temperature and vertical profiles of aerosols. A method is presented to correct the aerosol backscattering coefficient using atmospheric temperature profiles, obtained from Raman scattering signals. The differences in the extracted aerosol backscattering coefficient with and without considering temperature effects are further discussed. The backscattering coefficients for scattering off clouds are shown to be more sensitive to temperature than that of aerosols and atmosphere molecules; the aerosol backscattering coefficient is more sensitive to temperature in summer due to higher atmospheric temperatures. |
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Keywords: | Lidar Atmospheric temperature Aerosol Raman scattering Backscattering coefficient |
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