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Aerosol observations by lidar in the nocturnal boundary layer

机译：夜间边界层中激光雷达的气溶胶观测

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Aerosol observations by lidar in the nocturnal boundary layer (NBL) were performed in Potenza, Southern Italy, from 20 January to 20 February 1997. Measurements during nine winter nights were considered, covering a variety of boundary-layer conditions. The vertical profiles of the aerosol backscattering coefficient at 355 and 723.37 nm were determined through a Klett-modified iterative procedure, assuming the extinction-to-backscattering ratio within the NBL has a constant value. Aerosol average size characteristics were retrieved from almost simultaneous profiles of the aerosol backscattering coefficient at 355 and 723.37 nm, the measurements being consistent with an accumulation mode radius not exceeding 0.4 μm. Similar results in terms of aerosol sizes were obtained from measurements of the extinction-to-backscattering ratio profile at 355 nm performed on six nights during the measurement campaign. Backscattering profiles at 723.37 nm were also converted into profiles of aerosol liquid water content.
机译：1997年1月20日至2月20日在意大利南部的波坦察进行了激光雷达对夜间边界层（NBL）的气溶胶观测。考虑了在九个冬夜进行的测量，涵盖了各种边界层条件。假设NBL内的消光/背散射比为常数，则通过Klett修正的迭代过程确定355和723.37 nm处的气溶胶背散射系数的垂直分布。从355和723.37 nm处的气溶胶反向散射系数的几乎同时的轮廓中获取了气溶胶的平均尺寸特征，这些测量结果与不超过0.4μm的累积模式半径一致。在测量活动期间的六个晚上，从在355 nm处的消光-背向散射比分布图的测量获得了关于气溶胶尺寸的类似结果。在723.37 nm处的反向散射剖面也被转换为气溶胶液体水含量的剖面。

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