Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements

Abstract Surface albedo is an important forcing parameter that drives the radiative energy budget as it determines the fraction of the downwelling solar irradiance that the surface reflects. Here we report on ground-based measurements of the spectral albedo (350–2200 nm) carried out at 20 sites acro...

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Autores principales:	Raúl R. Cordero, Sarah Feron, Edgardo Sepúlveda, Alessandro Damiani, Juan M. Carrera, Jose Jorquera, Juan A. Alfonso, Rosalino Fuenzalida, Miguel Rivas, Shelley MacDonell, Gunther Seckmeyer, Chenghao Wang, Zutao Ouyang, Stef Lhermitte
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/db8393c0c2c945e886aee75b5b0ec08c
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spelling	oai:doaj.org-article:db8393c0c2c945e886aee75b5b0ec08c2021-12-02T18:01:47ZEvaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements10.1038/s41598-021-98622-42045-2322https://doaj.org/article/db8393c0c2c945e886aee75b5b0ec08c2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98622-4https://doaj.org/toc/2045-2322Abstract Surface albedo is an important forcing parameter that drives the radiative energy budget as it determines the fraction of the downwelling solar irradiance that the surface reflects. Here we report on ground-based measurements of the spectral albedo (350–2200 nm) carried out at 20 sites across a North–South transect of approximately 1300 km in the Atacama Desert, from latitude 18° S to latitude 30° S. These spectral measurements were used to evaluate remote sensing estimates of the albedo derived from the Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the relative mean bias error (RMBE) of MODIS-derived estimates was within ± 5% of ground-based measurements in most of the Atacama Desert (18–27° S). Although the correlation between MODIS-derived estimates and ground-based measurements remained relatively high (R= 0.94), RMBE values were slightly larger in the southernmost part of the desert (27–30° S). Both MODIS-derived data and ground-based measurements show that the albedo at some bright spots in the Atacama Desert may be high enough (up to 0.25 in visible range) for considerably boosting the performance of bifacial photovoltaic technologies (6–12%).Raúl R. CorderoSarah FeronEdgardo SepúlvedaAlessandro DamianiJuan M. CarreraJose JorqueraJuan A. AlfonsoRosalino FuenzalidaMiguel RivasShelley MacDonellGunther SeckmeyerChenghao WangZutao OuyangStef LhermitteNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Raúl R. Cordero Sarah Feron Edgardo Sepúlveda Alessandro Damiani Juan M. Carrera Jose Jorquera Juan A. Alfonso Rosalino Fuenzalida Miguel Rivas Shelley MacDonell Gunther Seckmeyer Chenghao Wang Zutao Ouyang Stef Lhermitte Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements
description	Abstract Surface albedo is an important forcing parameter that drives the radiative energy budget as it determines the fraction of the downwelling solar irradiance that the surface reflects. Here we report on ground-based measurements of the spectral albedo (350–2200 nm) carried out at 20 sites across a North–South transect of approximately 1300 km in the Atacama Desert, from latitude 18° S to latitude 30° S. These spectral measurements were used to evaluate remote sensing estimates of the albedo derived from the Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the relative mean bias error (RMBE) of MODIS-derived estimates was within ± 5% of ground-based measurements in most of the Atacama Desert (18–27° S). Although the correlation between MODIS-derived estimates and ground-based measurements remained relatively high (R= 0.94), RMBE values were slightly larger in the southernmost part of the desert (27–30° S). Both MODIS-derived data and ground-based measurements show that the albedo at some bright spots in the Atacama Desert may be high enough (up to 0.25 in visible range) for considerably boosting the performance of bifacial photovoltaic technologies (6–12%).
format	article
author	Raúl R. Cordero Sarah Feron Edgardo Sepúlveda Alessandro Damiani Juan M. Carrera Jose Jorquera Juan A. Alfonso Rosalino Fuenzalida Miguel Rivas Shelley MacDonell Gunther Seckmeyer Chenghao Wang Zutao Ouyang Stef Lhermitte
author_facet	Raúl R. Cordero Sarah Feron Edgardo Sepúlveda Alessandro Damiani Juan M. Carrera Jose Jorquera Juan A. Alfonso Rosalino Fuenzalida Miguel Rivas Shelley MacDonell Gunther Seckmeyer Chenghao Wang Zutao Ouyang Stef Lhermitte
author_sort	Raúl R. Cordero
title	Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements
title_short	Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements
title_full	Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements
title_fullStr	Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements
title_full_unstemmed	Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements
title_sort	evaluation of modis-derived estimates of the albedo over the atacama desert using ground-based spectral measurements
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/db8393c0c2c945e886aee75b5b0ec08c
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Evaluation of MODIS-derived estimates of the albedo over the Atacama Desert using ground-based spectral measurements

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