Evaluation of the MERIS aerosol product over land with AERONET
The Medium Resolution Imaging Spectrometer (MERIS) launched in February 2002 on-board the ENVISAT spacecraft is making global observations of top-of-atmosphere (TOA) radiances. Aerosol optical properties are retrieved over land using Look-Up Table (LUT) based algorithm and surface reflectances in th...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00047942 2023-05-15T13:06:10+02:00 Evaluation of the MERIS aerosol product over land with AERONET Vidot, J. Santer, R. Aznay, O. 2008-12 electronic https://doi.org/10.5194/acp-8-7603-2008 https://noa.gwlb.de/receive/cop_mods_00047942 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047562/acp-8-7603-2008.pdf https://acp.copernicus.org/articles/8/7603/2008/acp-8-7603-2008.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-8-7603-2008 https://noa.gwlb.de/receive/cop_mods_00047942 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047562/acp-8-7603-2008.pdf https://acp.copernicus.org/articles/8/7603/2008/acp-8-7603-2008.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2008 ftnonlinearchiv https://doi.org/10.5194/acp-8-7603-2008 2022-02-08T22:38:12Z The Medium Resolution Imaging Spectrometer (MERIS) launched in February 2002 on-board the ENVISAT spacecraft is making global observations of top-of-atmosphere (TOA) radiances. Aerosol optical properties are retrieved over land using Look-Up Table (LUT) based algorithm and surface reflectances in the blue and the red spectral regions. We compared instantaneous aerosol optical thicknesses retrieved by MERIS in the blue and the red at locations containing sites within the Aerosol Robotic Network (AERONET). Between 2002 and 2005, a set of 500 MERIS images were used in this study. The result shows that, over land, MERIS aerosol optical thicknesses are well retrieved in the blue and poorly retrieved in the red, leading to an underestimation of the Angstrom coefficient. Correlations are improved by applying a simple criterion to avoid scenes probably contaminated by thin clouds. To investigate the weakness of the MERIS algorithm, ground-based radiometer measurements have been used in order to retrieve new aerosol models, based on their Inherent Optical Properties (IOP). These new aerosol models slightly improve the correlation, but the main problem of the MERIS aerosol product over land can be attributed to the surface reflectance model in the red. Article in Journal/Newspaper Aerosol Robotic Network Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 8 24 7603 7617 |
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article Verlagsveröffentlichung Vidot, J. Santer, R. Aznay, O. Evaluation of the MERIS aerosol product over land with AERONET |
topic_facet |
article Verlagsveröffentlichung |
description |
The Medium Resolution Imaging Spectrometer (MERIS) launched in February 2002 on-board the ENVISAT spacecraft is making global observations of top-of-atmosphere (TOA) radiances. Aerosol optical properties are retrieved over land using Look-Up Table (LUT) based algorithm and surface reflectances in the blue and the red spectral regions. We compared instantaneous aerosol optical thicknesses retrieved by MERIS in the blue and the red at locations containing sites within the Aerosol Robotic Network (AERONET). Between 2002 and 2005, a set of 500 MERIS images were used in this study. The result shows that, over land, MERIS aerosol optical thicknesses are well retrieved in the blue and poorly retrieved in the red, leading to an underestimation of the Angstrom coefficient. Correlations are improved by applying a simple criterion to avoid scenes probably contaminated by thin clouds. To investigate the weakness of the MERIS algorithm, ground-based radiometer measurements have been used in order to retrieve new aerosol models, based on their Inherent Optical Properties (IOP). These new aerosol models slightly improve the correlation, but the main problem of the MERIS aerosol product over land can be attributed to the surface reflectance model in the red. |
format |
Article in Journal/Newspaper |
author |
Vidot, J. Santer, R. Aznay, O. |
author_facet |
Vidot, J. Santer, R. Aznay, O. |
author_sort |
Vidot, J. |
title |
Evaluation of the MERIS aerosol product over land with AERONET |
title_short |
Evaluation of the MERIS aerosol product over land with AERONET |
title_full |
Evaluation of the MERIS aerosol product over land with AERONET |
title_fullStr |
Evaluation of the MERIS aerosol product over land with AERONET |
title_full_unstemmed |
Evaluation of the MERIS aerosol product over land with AERONET |
title_sort |
evaluation of the meris aerosol product over land with aeronet |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/acp-8-7603-2008 https://noa.gwlb.de/receive/cop_mods_00047942 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047562/acp-8-7603-2008.pdf https://acp.copernicus.org/articles/8/7603/2008/acp-8-7603-2008.pdf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-8-7603-2008 https://noa.gwlb.de/receive/cop_mods_00047942 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047562/acp-8-7603-2008.pdf https://acp.copernicus.org/articles/8/7603/2008/acp-8-7603-2008.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-8-7603-2008 |
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Atmospheric Chemistry and Physics |
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8 |
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24 |
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7603 |
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7617 |
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