Abstract. This paper presents a collection of lidar-derived aerosol intensive optical properties for several aerosol types, namely the particle linear depolarization ratio, the extinction-to-backscatter ratio (lidar ratio) and the Ångström exponent. The data collection, named DeLiAn, is based on globally distributed, long-term, ground-based, multiwavelength, Raman and polarisation lidar measurements, conducted mainly with lidars that have been developed at the Leibniz Institute for Tropospheric Research. The intensive optical properties are presented at two wavelengths, 355 and 532 nm, for 13 aerosol categories. The categories cover the basic aerosol types (i.e., marine, pollution, continental European background, volcanic ash, smoke, mineral dust) as well as the most frequently observed mixtures they form. This extensive collection also incorporates more peculiar aerosol categories, including dried marine aerosol that, compared to marine aerosol, exhibits a significantly enhanced depolarization ratio (up to 15 %). Besides Saharan dust, additional mineral dust types related to their source region were identified due to their lower lidar ratios (Central Asian and Middle Eastern dust). In addition, extreme wildfire events (such as in north America and Australia) emitted smoke into the stratosphere showing significant different optical properties, i.e., high depolarization values (up to 25 %), compared to tropospheric smoke. The data collection reflects and underlines the variety of aerosol mixtures in the atmosphere and can be used for the development of aerosol typing schemes. The paper contains the currently most comprehensive overview of optical properties from aerosol lidar measurements and, therefore, provides a solid basis for future aerosol retrievals in the frame of both spaceborne and ground-based lidars. Furthermore, DeLiAn can assist the efforts for harmonization of satellite records of aerosol properties performed at different wavelengths.

中文翻译：

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DeLiAn – 越来越多的去极化比、激光雷达比和 Ångström 指数，用于不同气溶胶类型和来自地面激光雷达观测的混合物

摘要。本文介绍了几种气溶胶类型的激光雷达衍生气溶胶密集光学特性的集合，即粒子线性去偏振比、消光背散射比（激光雷达比）和 Ångström 指数。名为 DeLiAn 的数据收集基于全球分布的、长期的、基于地面的、多波长的、拉曼和偏振激光雷达测量，主要使用莱布尼茨对流层研究所开发的激光雷达进行。对于 13 种气溶胶类别，在 355 和 532 nm 这两个波长下显示了强烈的光学特性。这些类别涵盖了基本的气溶胶类型（即海洋、污染、欧洲大陆背景、火山灰、烟雾、矿物粉尘）以及它们形成的最常观察到的混合物。这个广泛的集合还包含更多特殊的气溶胶类别，包括干燥的海洋气溶胶，与海洋气溶胶相比，它表现出显着增强的去极化率（高达 15%）。除了撒哈拉尘埃之外，由于激光雷达比率较低（中亚和中东尘埃），还确定了与其来源区域相关的其他矿物尘埃类型。此外，与对流层烟雾相比，极端野火事件（例如在北美和澳大利亚）向平流层排放的烟雾显示出显着不同的光学特性，即高去偏振值（高达 25%）。数据收集反映并强调了大气中气溶胶混合物的多样性，可用于制定气溶胶分类方案。该论文包含目前最全面的气溶胶激光雷达测量光学特性概述，因此为未来星载和地面激光雷达框架内的气溶胶检索提供了坚实的基础。此外，DeLiAn 可以协助协调在不同波长下进行的气溶胶特性的卫星记录。