Remote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data

Aerosol optical depth is an important indicator of aerosol particle properties and their associated radiative impacts. AOD determination very to achieve relevant climate modelling. Most remote sensing techniques retrieve are applicable daytime given the high level light available. The night represents half time but in such conditions only a few methods Among these approaches, most reliable moon photometers star photometers. In this paper, we attempt fill gaps detection performed with aforementioned using sky brightness measurements during moonless nights novel CoSQM, portable, low-cost open-source multispectral photometer. present innovative method for estimating empirical relationship between zenith measured at CoSQM retrieved from AErosol Robotic NETwork. Although proposed does not measure directly, CE318-T shown give good results location Santa Cruz de Tenerife. Such especially suited light-polluted regions pollution sources located within kilometres observation site. A coherent day-to-night Ångström Exponent evolution set 354 days August 2019 February 2021 was verified Tenerife on island Tenerife, Spain. preliminary uncertainty technique evaluated variance under stable conditions, 0.02 0.75 Exponent. These indicate methodology appear be promising tool, adding new information aerosols night, which could key importance improving predictions.