Aerosol Observing System (AOS): Humidograph - aoshumidgr

The aerosol observing system (AOS) is the primary platform for in situ aerosol measurements at Earth s surface. Each AOS has a different complement of instruments, which are selected to ensure the best measurements at each deployment site. \n \nThe AOS measures aerosol optical properties to better understand how particles interact with solar radiation and influence the Earth's radiation balance. These measurements are useful for calculating parameters used in radiative forcing calculations, such as the aerosol single scattering albedo, asymmetry parameter, mass scattering efficiency, and hygroscopic growth. Measurements made with the AOS form a long-term record at the ARM fixed sites. Shorter measurement records are available from mobile deployments in a wide variety of geographical regions. These measurements are valuable for: \n \n identifying long-term changes in aerosol properties \n identifying atmospheric processes controlling aerosol life cycle and their influence on clouds \n providing experimental data for developing and testing atmospheric climate models. \n

气溶胶观测系统（Aerosol Observing System，AOS）是开展地球地表原位气溶胶观测的核心平台。每套AOS的仪器配置各不相同，仪器选型均针对具体部署场地优化，以获取最优观测数据。

AOS通过观测气溶胶光学特性，深入解析气溶胶粒子与太阳辐射的相互作用机制及其对地球辐射平衡的影响。此类观测数据可用于计算辐射强迫计算所需的各类参数，例如气溶胶单次散射反照率、不对称参数、质量散射效率以及吸湿性增长因子。AOS在ARM固定观测站点形成了长期观测序列；而在各类地理区域开展的移动观测任务，则可获取较短时长的观测记录。

此类观测数据具有以下重要应用价值：
识别气溶胶特性的长期变化趋势
解析调控气溶胶生命周期及其对云系影响的大气物理过程
为大气气候模式的开发与验证提供实验观测数据。