Retrieval of aerosol properties from zenith sky radiance measurements
This study explores the potential to retrieve aerosol properties with the GRASP algorithm (Generalized Retrieval of Atmosphere and Surface Properties) using as input measurements of zenith sky radiance (ZSR), which are sky radiance values measured in the zenith direction, recorded at four wavelength...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00069185 2023-11-12T03:59:50+01:00 Retrieval of aerosol properties from zenith sky radiance measurements Herrero-Anta, Sara Román, Roberto Mateos, David González, Ramiro Antuña-Sánchez, Juan Carlos Herreras-Giralda, Marcos Almansa, Antonio Fernando González-Fernández, Daniel Herrero del Barrio, Celia Toledano, Carlos Cachorro, Victoria E. de Frutos, Ángel M. 2023-10 electronic https://doi.org/10.5194/amt-16-4423-2023 https://noa.gwlb.de/receive/cop_mods_00069185 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067583/amt-16-4423-2023.pdf https://amt.copernicus.org/articles/16/4423/2023/amt-16-4423-2023.pdf eng eng Copernicus Publications Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-16-4423-2023 https://noa.gwlb.de/receive/cop_mods_00069185 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067583/amt-16-4423-2023.pdf https://amt.copernicus.org/articles/16/4423/2023/amt-16-4423-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/amt-16-4423-2023 2023-10-15T23:22:18Z This study explores the potential to retrieve aerosol properties with the GRASP algorithm (Generalized Retrieval of Atmosphere and Surface Properties) using as input measurements of zenith sky radiance (ZSR), which are sky radiance values measured in the zenith direction, recorded at four wavelengths by a ZEN-R52 radiometer. To this end, the ZSR measured at 440, 500, 675 and 870 nm by a ZEN-R52 (ZSRZEN), installed in Valladolid (Spain), is employed. This instrument is calibrated by intercomparing the signal of each channel with coincident ZSR values simulated (ZSRSIM) at the same wavelengths with a radiative transfer model (RTM). These simulations are carried out using the GRASP forward module as RTM and the aerosol information from a co-located CE318 photometer belonging to AERONET (AErosol RObotic NETwork) as input. The dark signal and the signal dependence on temperature are characterized and included in the calibration process. The uncertainties for each channel are quantified by an intercomparison with a co-located CE318 photometer, obtaining lower values for shorter wavelengths; they are between 3 % for 440 nm and 21 % for 870 nm. The proposed inversion strategy for the aerosol retrieval using the ZSRZEN measurements as input, i.e. so-called GRASP-ZEN, assumes the aerosol as an external mixture of five pre-calculated aerosol types. A sensitivity analysis is conducted using synthetic ZSRZEN measurements, pointing out that these measurements are sensitive to aerosol load and type. It also assesses that the retrieved aerosol optical depth (AOD) values in general overestimate the reference ones by 0.03, 0.02, 0.02 and 0.01 for 440, 500, 675 and 870 nm, respectively. The calibrated ZSRZEN measurements, recorded during 2.5 years at Valladolid, are inverted by the GRASP-ZEN strategy to retrieve some aerosol properties like AOD. The retrieved AOD shows a high correlation with respect to independent values obtained from a co-located AERONET CE318 photometer, with determination coefficients (r2) of 0.86, 0.85, 0.79 ... Article in Journal/Newspaper Aerosol Robotic Network Niedersächsisches Online-Archiv NOA Atmospheric Measurement Techniques 16 19 4423 4443 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Herrero-Anta, Sara Román, Roberto Mateos, David González, Ramiro Antuña-Sánchez, Juan Carlos Herreras-Giralda, Marcos Almansa, Antonio Fernando González-Fernández, Daniel Herrero del Barrio, Celia Toledano, Carlos Cachorro, Victoria E. de Frutos, Ángel M. Retrieval of aerosol properties from zenith sky radiance measurements |
topic_facet |
article Verlagsveröffentlichung |
description |
This study explores the potential to retrieve aerosol properties with the GRASP algorithm (Generalized Retrieval of Atmosphere and Surface Properties) using as input measurements of zenith sky radiance (ZSR), which are sky radiance values measured in the zenith direction, recorded at four wavelengths by a ZEN-R52 radiometer. To this end, the ZSR measured at 440, 500, 675 and 870 nm by a ZEN-R52 (ZSRZEN), installed in Valladolid (Spain), is employed. This instrument is calibrated by intercomparing the signal of each channel with coincident ZSR values simulated (ZSRSIM) at the same wavelengths with a radiative transfer model (RTM). These simulations are carried out using the GRASP forward module as RTM and the aerosol information from a co-located CE318 photometer belonging to AERONET (AErosol RObotic NETwork) as input. The dark signal and the signal dependence on temperature are characterized and included in the calibration process. The uncertainties for each channel are quantified by an intercomparison with a co-located CE318 photometer, obtaining lower values for shorter wavelengths; they are between 3 % for 440 nm and 21 % for 870 nm. The proposed inversion strategy for the aerosol retrieval using the ZSRZEN measurements as input, i.e. so-called GRASP-ZEN, assumes the aerosol as an external mixture of five pre-calculated aerosol types. A sensitivity analysis is conducted using synthetic ZSRZEN measurements, pointing out that these measurements are sensitive to aerosol load and type. It also assesses that the retrieved aerosol optical depth (AOD) values in general overestimate the reference ones by 0.03, 0.02, 0.02 and 0.01 for 440, 500, 675 and 870 nm, respectively. The calibrated ZSRZEN measurements, recorded during 2.5 years at Valladolid, are inverted by the GRASP-ZEN strategy to retrieve some aerosol properties like AOD. The retrieved AOD shows a high correlation with respect to independent values obtained from a co-located AERONET CE318 photometer, with determination coefficients (r2) of 0.86, 0.85, 0.79 ... |
format |
Article in Journal/Newspaper |
author |
Herrero-Anta, Sara Román, Roberto Mateos, David González, Ramiro Antuña-Sánchez, Juan Carlos Herreras-Giralda, Marcos Almansa, Antonio Fernando González-Fernández, Daniel Herrero del Barrio, Celia Toledano, Carlos Cachorro, Victoria E. de Frutos, Ángel M. |
author_facet |
Herrero-Anta, Sara Román, Roberto Mateos, David González, Ramiro Antuña-Sánchez, Juan Carlos Herreras-Giralda, Marcos Almansa, Antonio Fernando González-Fernández, Daniel Herrero del Barrio, Celia Toledano, Carlos Cachorro, Victoria E. de Frutos, Ángel M. |
author_sort |
Herrero-Anta, Sara |
title |
Retrieval of aerosol properties from zenith sky radiance measurements |
title_short |
Retrieval of aerosol properties from zenith sky radiance measurements |
title_full |
Retrieval of aerosol properties from zenith sky radiance measurements |
title_fullStr |
Retrieval of aerosol properties from zenith sky radiance measurements |
title_full_unstemmed |
Retrieval of aerosol properties from zenith sky radiance measurements |
title_sort |
retrieval of aerosol properties from zenith sky radiance measurements |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/amt-16-4423-2023 https://noa.gwlb.de/receive/cop_mods_00069185 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067583/amt-16-4423-2023.pdf https://amt.copernicus.org/articles/16/4423/2023/amt-16-4423-2023.pdf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-16-4423-2023 https://noa.gwlb.de/receive/cop_mods_00069185 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067583/amt-16-4423-2023.pdf https://amt.copernicus.org/articles/16/4423/2023/amt-16-4423-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/amt-16-4423-2023 |
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Atmospheric Measurement Techniques |
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