Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG
International audience The Spinning Enhanced Visible and InfraRed Imager (SEVIRI) aboard Meteosat Second Generation (MSG) launched in 2003 by EUMETSAT is dedicated to the Nowcasting applications and Numerical Weather Prediction and to the provision of observations for climate monitoring and research...
Published in: | Atmospheric Measurement Techniques |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2011
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Online Access: | https://hal.archives-ouvertes.fr/hal-03201609 https://hal.archives-ouvertes.fr/hal-03201609/document https://hal.archives-ouvertes.fr/hal-03201609/file/amt-4-2543-2011.pdf https://doi.org/10.5194/amt-4-2543-2011 |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Bernard, E. Moulin, C. Ramon, D. Jolivet, D. Riedi, J. Nicolas, J.-M. Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The Spinning Enhanced Visible and InfraRed Imager (SEVIRI) aboard Meteosat Second Generation (MSG) launched in 2003 by EUMETSAT is dedicated to the Nowcasting applications and Numerical Weather Prediction and to the provision of observations for climate monitoring and research. We use the data in visible and near infrared (NIR) channels to derive the aerosol optical thickness (AOT) over land. The algorithm is based on the assumption that the top of the atmosphere (TOA) reflectance increases with the aerosol load. This is a reasonable assumption except in case of absorbing aerosols above bright surfaces. We assume that the minimum in a 14-days time series of the TOA reflectance is, once corrected from gaseous scattering and absorption, representative of the surface reflectance. The AOT and the aerosol model (a set of 5 models is used), are retrieved by matching the simulated TOA reflectance with the TOA reflectances measured by SEVIRI in its visible and NIR spectral bands. The high temporal resolution of the data acquisition by SEVIRI allows to retrieve the AOT every 15 min with a spatial resolution of 3 km at sub-satellite point, over the entire SEVIRI disk covering Europe, Africa and part of South America. The resulting AOT, a level 2 product at the native temporal and spatial SEVIRI resolutions, is presented and evaluated in this paper. The AOT has been validated using ground based measurements from AErosol RObotic NETwork (AERONET), a sun-photometer network, focusing over Europe for 3 months in 2006. The SEVIRI estimates correlate well with the AERONET measurements, $r$ = 0.64, with a slight overestimate, bias = −0.017. The sources of errors are mainly the cloud contamination and the bad estimation of the surface reflectance. The temporal evolutions exhibited by both datasets show very good agreement which allows to conclude that the AOT Level 2 product from SEVIRI can be used to quantify the aerosol content and to monitor its daily evolution with a high temporal frequency. The ... |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) HYGEOS (SARL) Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) interaction Clouds Aerosols Radiations - ICARE/AERIS Data and Services Center - UMS 2877 (ICARE) Centre National d'Études Spatiales Toulouse (CNES)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) The publication of this article is financed by CNRS-INSU |
format |
Article in Journal/Newspaper |
author |
Bernard, E. Moulin, C. Ramon, D. Jolivet, D. Riedi, J. Nicolas, J.-M. |
author_facet |
Bernard, E. Moulin, C. Ramon, D. Jolivet, D. Riedi, J. Nicolas, J.-M. |
author_sort |
Bernard, E. |
title |
Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG |
title_short |
Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG |
title_full |
Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG |
title_fullStr |
Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG |
title_full_unstemmed |
Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG |
title_sort |
description and validation of an aot product over land at the 0.6 μm channel of the seviri sensor onboard msg |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.archives-ouvertes.fr/hal-03201609 https://hal.archives-ouvertes.fr/hal-03201609/document https://hal.archives-ouvertes.fr/hal-03201609/file/amt-4-2543-2011.pdf https://doi.org/10.5194/amt-4-2543-2011 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 1867-1381 EISSN: 1867-8548 Atmospheric Measurement Techniques https://hal.archives-ouvertes.fr/hal-03201609 Atmospheric Measurement Techniques, European Geosciences Union, 2011, 4, pp.2543-2565. ⟨10.5194/amt-4-2543-2011⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-4-2543-2011 hal-03201609 https://hal.archives-ouvertes.fr/hal-03201609 https://hal.archives-ouvertes.fr/hal-03201609/document https://hal.archives-ouvertes.fr/hal-03201609/file/amt-4-2543-2011.pdf doi:10.5194/amt-4-2543-2011 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/amt-4-2543-2011 |
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Atmospheric Measurement Techniques |
container_volume |
4 |
container_issue |
11 |
container_start_page |
2543 |
op_container_end_page |
2565 |
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1766036261310562304 |
spelling |
ftccsdartic:oai:HAL:hal-03201609v1 2023-05-15T13:07:08+02:00 Description and validation of an AOT product over land at the 0.6 μm channel of the SEVIRI sensor onboard MSG Bernard, E. Moulin, C. Ramon, D. Jolivet, D. Riedi, J. Nicolas, J.-M. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) HYGEOS (SARL) Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) interaction Clouds Aerosols Radiations - ICARE/AERIS Data and Services Center - UMS 2877 (ICARE) Centre National d'Études Spatiales Toulouse (CNES)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) The publication of this article is financed by CNRS-INSU 2011 https://hal.archives-ouvertes.fr/hal-03201609 https://hal.archives-ouvertes.fr/hal-03201609/document https://hal.archives-ouvertes.fr/hal-03201609/file/amt-4-2543-2011.pdf https://doi.org/10.5194/amt-4-2543-2011 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/amt-4-2543-2011 hal-03201609 https://hal.archives-ouvertes.fr/hal-03201609 https://hal.archives-ouvertes.fr/hal-03201609/document https://hal.archives-ouvertes.fr/hal-03201609/file/amt-4-2543-2011.pdf doi:10.5194/amt-4-2543-2011 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1867-1381 EISSN: 1867-8548 Atmospheric Measurement Techniques https://hal.archives-ouvertes.fr/hal-03201609 Atmospheric Measurement Techniques, European Geosciences Union, 2011, 4, pp.2543-2565. ⟨10.5194/amt-4-2543-2011⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2011 ftccsdartic https://doi.org/10.5194/amt-4-2543-2011 2021-12-19T00:16:08Z International audience The Spinning Enhanced Visible and InfraRed Imager (SEVIRI) aboard Meteosat Second Generation (MSG) launched in 2003 by EUMETSAT is dedicated to the Nowcasting applications and Numerical Weather Prediction and to the provision of observations for climate monitoring and research. We use the data in visible and near infrared (NIR) channels to derive the aerosol optical thickness (AOT) over land. The algorithm is based on the assumption that the top of the atmosphere (TOA) reflectance increases with the aerosol load. This is a reasonable assumption except in case of absorbing aerosols above bright surfaces. We assume that the minimum in a 14-days time series of the TOA reflectance is, once corrected from gaseous scattering and absorption, representative of the surface reflectance. The AOT and the aerosol model (a set of 5 models is used), are retrieved by matching the simulated TOA reflectance with the TOA reflectances measured by SEVIRI in its visible and NIR spectral bands. The high temporal resolution of the data acquisition by SEVIRI allows to retrieve the AOT every 15 min with a spatial resolution of 3 km at sub-satellite point, over the entire SEVIRI disk covering Europe, Africa and part of South America. The resulting AOT, a level 2 product at the native temporal and spatial SEVIRI resolutions, is presented and evaluated in this paper. The AOT has been validated using ground based measurements from AErosol RObotic NETwork (AERONET), a sun-photometer network, focusing over Europe for 3 months in 2006. The SEVIRI estimates correlate well with the AERONET measurements, $r$ = 0.64, with a slight overestimate, bias = −0.017. The sources of errors are mainly the cloud contamination and the bad estimation of the surface reflectance. The temporal evolutions exhibited by both datasets show very good agreement which allows to conclude that the AOT Level 2 product from SEVIRI can be used to quantify the aerosol content and to monitor its daily evolution with a high temporal frequency. The ... Article in Journal/Newspaper Aerosol Robotic Network Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Atmospheric Measurement Techniques 4 11 2543 2565 |