Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements
A comprehensive comparison of more than 70 000 synchronous 1 min aerosol optical depth (AOD) data from three Global Atmosphere Watch precision-filter radiometers (GAW-PFR), traceable to the World AOD reference, and 15 Aerosol Robotic Network Cimel radiometers (AERONET-Cimel), calibrated individually...
Published in: | Atmospheric Measurement Techniques |
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Language: | English |
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Online Access: | https://hdl.handle.net/20.500.11765/10753 |
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ftaemet:oai:repositorio.aemet.es:20.500.11765/10753 2024-06-23T07:45:00+00:00 Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements Cuevas Agulló, Emilio Romero Campos, Pedro Miguel Kouremeti, Natalia Kazadzis, Stelios Räisänen, Petri García Cabrera, Rosa Delia Barreto Velasco, África Guirado-Fuentes, Carmen Ramos López, Ramón Toledano, Carlos Almansa Rodríguez, Antonio Fernando Gröbner, Julian 2019 https://hdl.handle.net/20.500.11765/10753 eng eng European Geosciences Union https://dx.doi.org/10.5194/amt-12-4309-2019 info:eu-repo/grantAgreement/EC/H2020/654109 Atmospheric Measurement Techniques. 2019, 12(8), p. 4309–4337 1867-1381 1867-8548 http://hdl.handle.net/20.500.11765/10753 Licencia CC: Reconocimiento CC BY info:eu-repo/semantics/openAccess Aerosol optical depth Radiometers Global Atmosphere Watch AERONET-Cimel Aerosol measurement info:eu-repo/semantics/article 2019 ftaemet https://doi.org/20.500.11765/1075310.5194/amt-12-4309-2019 2024-06-03T14:17:56Z A comprehensive comparison of more than 70 000 synchronous 1 min aerosol optical depth (AOD) data from three Global Atmosphere Watch precision-filter radiometers (GAW-PFR), traceable to the World AOD reference, and 15 Aerosol Robotic Network Cimel radiometers (AERONET-Cimel), calibrated individually with the Langley plot technique, was performed for four common or “near” wavelengths, 380, 440, 500 and 870 nm, in the period 2005–2015. The goal of this study is to assess whether, despite the marked technical differences between both networks (AERONET, GAW-PFR) and the number of instruments used, their long-term AOD data are comparable and consistent. The percentage of data meeting the World Meteorological Organization (WMO) traceability requirements (95 % of the AOD differences of an instrument compared to the WMO standards lie within specific limits) is >92 % at 380 nm, >95 % at 440 nm and 500 nm, and 98 % at 870 nm, with the results being quite similar for both AERONET version 2 (V2) and version 3 (V3). For the data outside these limits, the contribution of calibration and differences in the calculation of the optical depth contribution due to Rayleigh scattering and O3 and NO2absorption have a negligible impact. For AOD >0.1, a small but non-negligible percentage (∼1.9 %) of the AOD data outside the WMO limits at 380 nm can be partly assigned to the impact of dust aerosol forward scattering on the AOD calculation due to the different field of view of the instruments. Due to this effect the GAW-PFR provides AOD values, which are ∼3 % lower at 380 nm and ∼2 % lower at 500 nm compared with AERONET-Cimel. The comparison of the Ångström exponent (AE) shows that under non-pristine conditions (AOD >0.03 and AE <1) the AE differences remain <0.1. This long-term comparison shows an excellent traceability of AERONET-Cimel AOD with the World AOD reference at 440, 500 and 870 nm channels and a fairly good agreement at 380 nm, although AOD should be improved in the UV range. The Federal Office of ... Article in Journal/Newspaper Aerosol Robotic Network ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología) Atmospheric Measurement Techniques 12 8 4309 4337 |
institution |
Open Polar |
collection |
ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología) |
op_collection_id |
ftaemet |
language |
English |
topic |
Aerosol optical depth Radiometers Global Atmosphere Watch AERONET-Cimel Aerosol measurement |
spellingShingle |
Aerosol optical depth Radiometers Global Atmosphere Watch AERONET-Cimel Aerosol measurement Cuevas Agulló, Emilio Romero Campos, Pedro Miguel Kouremeti, Natalia Kazadzis, Stelios Räisänen, Petri García Cabrera, Rosa Delia Barreto Velasco, África Guirado-Fuentes, Carmen Ramos López, Ramón Toledano, Carlos Almansa Rodríguez, Antonio Fernando Gröbner, Julian Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements |
topic_facet |
Aerosol optical depth Radiometers Global Atmosphere Watch AERONET-Cimel Aerosol measurement |
description |
A comprehensive comparison of more than 70 000 synchronous 1 min aerosol optical depth (AOD) data from three Global Atmosphere Watch precision-filter radiometers (GAW-PFR), traceable to the World AOD reference, and 15 Aerosol Robotic Network Cimel radiometers (AERONET-Cimel), calibrated individually with the Langley plot technique, was performed for four common or “near” wavelengths, 380, 440, 500 and 870 nm, in the period 2005–2015. The goal of this study is to assess whether, despite the marked technical differences between both networks (AERONET, GAW-PFR) and the number of instruments used, their long-term AOD data are comparable and consistent. The percentage of data meeting the World Meteorological Organization (WMO) traceability requirements (95 % of the AOD differences of an instrument compared to the WMO standards lie within specific limits) is >92 % at 380 nm, >95 % at 440 nm and 500 nm, and 98 % at 870 nm, with the results being quite similar for both AERONET version 2 (V2) and version 3 (V3). For the data outside these limits, the contribution of calibration and differences in the calculation of the optical depth contribution due to Rayleigh scattering and O3 and NO2absorption have a negligible impact. For AOD >0.1, a small but non-negligible percentage (∼1.9 %) of the AOD data outside the WMO limits at 380 nm can be partly assigned to the impact of dust aerosol forward scattering on the AOD calculation due to the different field of view of the instruments. Due to this effect the GAW-PFR provides AOD values, which are ∼3 % lower at 380 nm and ∼2 % lower at 500 nm compared with AERONET-Cimel. The comparison of the Ångström exponent (AE) shows that under non-pristine conditions (AOD >0.03 and AE <1) the AE differences remain <0.1. This long-term comparison shows an excellent traceability of AERONET-Cimel AOD with the World AOD reference at 440, 500 and 870 nm channels and a fairly good agreement at 380 nm, although AOD should be improved in the UV range. The Federal Office of ... |
format |
Article in Journal/Newspaper |
author |
Cuevas Agulló, Emilio Romero Campos, Pedro Miguel Kouremeti, Natalia Kazadzis, Stelios Räisänen, Petri García Cabrera, Rosa Delia Barreto Velasco, África Guirado-Fuentes, Carmen Ramos López, Ramón Toledano, Carlos Almansa Rodríguez, Antonio Fernando Gröbner, Julian |
author_facet |
Cuevas Agulló, Emilio Romero Campos, Pedro Miguel Kouremeti, Natalia Kazadzis, Stelios Räisänen, Petri García Cabrera, Rosa Delia Barreto Velasco, África Guirado-Fuentes, Carmen Ramos López, Ramón Toledano, Carlos Almansa Rodríguez, Antonio Fernando Gröbner, Julian |
author_sort |
Cuevas Agulló, Emilio |
title |
Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements |
title_short |
Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements |
title_full |
Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements |
title_fullStr |
Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements |
title_full_unstemmed |
Aerosol optical depth comparison between GAW-PFR and AERONET-Cimel radiometers from long-term (2005–2015) 1 min synchronous measurements |
title_sort |
aerosol optical depth comparison between gaw-pfr and aeronet-cimel radiometers from long-term (2005–2015) 1 min synchronous measurements |
publisher |
European Geosciences Union |
publishDate |
2019 |
url |
https://hdl.handle.net/20.500.11765/10753 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
https://dx.doi.org/10.5194/amt-12-4309-2019 info:eu-repo/grantAgreement/EC/H2020/654109 Atmospheric Measurement Techniques. 2019, 12(8), p. 4309–4337 1867-1381 1867-8548 http://hdl.handle.net/20.500.11765/10753 |
op_rights |
Licencia CC: Reconocimiento CC BY info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11765/1075310.5194/amt-12-4309-2019 |
container_title |
Atmospheric Measurement Techniques |
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12 |
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8 |
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1802646928488398848 |