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 is very important to achieve relevant climate modelling. Most remote sensing techniques to retrieve aerosol optical depth are applicable to daytime given the high...

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Autores principales:	Charles Marseille, Martin Aubé, Africa Barreto, Alexandre Simoneau
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	artificial light at night aerosol optical depth radiometry multispectral measurement Science Q
Acceso en línea:	https://doaj.org/article/4843f893e37a41fd96c0ed942e3b113a
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spelling	oai:doaj.org-article:4843f893e37a41fd96c0ed942e3b113a2021-11-25T18:54:52ZRemote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data10.3390/rs132246232072-4292https://doaj.org/article/4843f893e37a41fd96c0ed942e3b113a2021-11-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/22/4623https://doaj.org/toc/2072-4292Aerosol optical depth is an important indicator of aerosol particle properties and their associated radiative impacts. AOD determination is very important to achieve relevant climate modelling. Most remote sensing techniques to retrieve aerosol optical depth are applicable to daytime given the high level of light available. The night represents half of the time but in such conditions only a few remote sensing methods are available. Among these approaches, the most reliable are moon photometers and star photometers. In this paper, we attempt to fill gaps in the aerosol detection performed with the aforementioned techniques using night sky brightness measurements during moonless nights with the novel CoSQM, a portable, low-cost and open-source multispectral photometer. In this paper, we present an innovative method for estimating the aerosol optical depth using an empirical relationship between the zenith night sky brightness measured at night with the CoSQM and the aerosol optical depth retrieved during daytime from the AErosol Robotic NETwork. Although the proposed method does not measure the AOD directly, an empirical relationship with the CE318-T is shown to give good results at the location of Santa Cruz de Tenerife. Such a method is especially suited to light-polluted regions with light pollution sources located within a few kilometres of the observation site. A coherent day-to-night aerosol optical depth and Ångström Exponent evolution in a set of 354 days and nights from August 2019 to February 2021 was verified at the location of Santa Cruz de Tenerife on the island of Tenerife, Spain. The preliminary uncertainty of this technique was evaluated using the variance under stable day-to-night conditions, set at 0.02 for aerosol optical depth and 0.75 for the Ångström Exponent. These results indicate the set of CoSQM and the proposed methodology appear to be a promising tool, adding new information on the optical properties of aerosols at night, which could be of key importance in improving climate predictions.Charles MarseilleMartin AubéAfrica BarretoAlexandre SimoneauMDPI AGarticleartificial light at nightaerosol optical depthradiometrymultispectralmeasurementScienceQENRemote Sensing, Vol 13, Iss 4623, p 4623 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	artificial light at night aerosol optical depth radiometry multispectral measurement Science Q
spellingShingle	artificial light at night aerosol optical depth radiometry multispectral measurement Science Q Charles Marseille Martin Aubé Africa Barreto Alexandre Simoneau Remote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data
description	Aerosol optical depth is an important indicator of aerosol particle properties and their associated radiative impacts. AOD determination is very important to achieve relevant climate modelling. Most remote sensing techniques to retrieve aerosol optical depth are applicable to daytime given the high level of light available. The night represents half of the time but in such conditions only a few remote sensing methods are available. Among these approaches, the most reliable are moon photometers and star photometers. In this paper, we attempt to fill gaps in the aerosol detection performed with the aforementioned techniques using night sky brightness measurements during moonless nights with the novel CoSQM, a portable, low-cost and open-source multispectral photometer. In this paper, we present an innovative method for estimating the aerosol optical depth using an empirical relationship between the zenith night sky brightness measured at night with the CoSQM and the aerosol optical depth retrieved during daytime from the AErosol Robotic NETwork. Although the proposed method does not measure the AOD directly, an empirical relationship with the CE318-T is shown to give good results at the location of Santa Cruz de Tenerife. Such a method is especially suited to light-polluted regions with light pollution sources located within a few kilometres of the observation site. A coherent day-to-night aerosol optical depth and Ångström Exponent evolution in a set of 354 days and nights from August 2019 to February 2021 was verified at the location of Santa Cruz de Tenerife on the island of Tenerife, Spain. The preliminary uncertainty of this technique was evaluated using the variance under stable day-to-night conditions, set at 0.02 for aerosol optical depth and 0.75 for the Ångström Exponent. These results indicate the set of CoSQM and the proposed methodology appear to be a promising tool, adding new information on the optical properties of aerosols at night, which could be of key importance in improving climate predictions.
format	article
author	Charles Marseille Martin Aubé Africa Barreto Alexandre Simoneau
author_facet	Charles Marseille Martin Aubé Africa Barreto Alexandre Simoneau
author_sort	Charles Marseille
title	Remote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data
title_short	Remote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data
title_full	Remote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data
title_fullStr	Remote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data
title_full_unstemmed	Remote Sensing of Aerosols at Night with the CoSQM Sky Brightness Data
title_sort	remote sensing of aerosols at night with the cosqm sky brightness data
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4843f893e37a41fd96c0ed942e3b113a
work_keys_str_mv	AT charlesmarseille remotesensingofaerosolsatnightwiththecosqmskybrightnessdata AT martinaube remotesensingofaerosolsatnightwiththecosqmskybrightnessdata AT africabarreto remotesensingofaerosolsatnightwiththecosqmskybrightnessdata AT alexandresimoneau remotesensingofaerosolsatnightwiththecosqmskybrightnessdata
_version_	1718410521032523776

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

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