Aerosol properties gridded data from 1995 to present derived from satellite observations

This data set provides observational records of aerosol properties obtained from observations collected by various satellite instruments. Aerosols are minor constituents of the atmosphere by mass, but critical components in terms of impact on climate. Aerosols influence the global radiation balance directly by scattering and absorbing radiation, and indirectly through influencing cloud reflectivity, cloud cover and cloud lifetime.
The main variables provided by this dataset are: aerosol optical depth, fine mode aerosol optical depth, dust aerosol optical depth, single scattering albedo, aerosol layer height and aerosol extinction coefficient. These variables are derived from observations from several sensors using a set of different processing techniques. This provides the possibility to derive a large set of complementary aerosol properties needed to describe the complex nature of atmospheric aerosols. Furthermore, different algorithms have their specific strengths and weaknesses, meaning that datasets originating from the same sensor but processed by different algorithms provide a way to evaluate uncertainties (e.g. areas of good or bad agreement between them). Altogether, the aerosol properties dataset is very extensive and offers a choice of complementary options – which is appropriate depends on the intended application.
Selected observational records in this dataset are extended in time on a semi-annual basis. At the moment of extending, these records are up-to-date until five months behind present time.
This dataset is produced on behalf of the Copernicus Climate Change Service.

本数据集提供了由多种卫星仪器收集的气溶胶特性观测记录。气溶胶按质量计是大气中的次要成分，但在影响气候方面却是关键组成部分。气溶胶通过散射和吸收辐射直接影响全球辐射平衡，并通过影响云反射率、云量和云寿命间接发挥作用。本数据集提供的主要变量包括：气溶胶光学深度、细颗粒气溶胶光学深度、尘埃气溶胶光学深度、单次散射反照率、气溶胶层高度和气溶胶消光系数。这些变量通过一组不同的处理技术，从多个传感器的观测中提取而来，从而为描述大气气溶胶的复杂特性提供了大量互补的气溶胶特性。此外，不同的算法具有各自的优势和劣势，这意味着来自同一传感器但经不同算法处理的数据集提供了一种评估不确定性的方法（例如，它们之间良好或不良的一致性区域）。总体而言，气溶胶特性数据集范围广泛，提供了多种互补选项——其适用性取决于预期应用。本数据集中的选定期观测记录每半年进行一次时间扩展。在扩展之际，这些记录保持最新状态，直至当前时间点之前五个月。本数据集由哥白尼气候变化服务代表生成。