Merging regional and global aerosol optical depth records from major available satellite products
International audience Satellite instruments provide a vantage point for studying aerosol loading consistently over different regions of the world. However, the typical lifetime of a single satellite platform is on the order of 5-15 years; thus, for climate studies, the use of multiple satellite sen...
Published in: | Atmospheric Chemistry and Physics |
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Online Access: | https://hal.science/hal-03009220 https://hal.science/hal-03009220/document https://hal.science/hal-03009220/file/Sogacheva%20et%20al%202020.pdf https://doi.org/10.5194/acp-20-2031-2020 |
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ftunivlille:oai:HAL:hal-03009220v1 2024-02-27T08:32:32+00:00 Merging regional and global aerosol optical depth records from major available satellite products Sogacheva, Larisa Popp, Thomas Sayer, Andrew, M Dubovik, O. Garay, Michael, J Heckel, Andreas Hsu, N. Christina, Christina Jethva, Hiren Kahn, Ralph, A Kolmonen, Pekka Kosmale, Miriam de Leeuw, Gerrit Levy, Robert, C Litvinov, Pavel Lyapustin, Alexei North, Peter Torres, Omar Arola, Antti 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) 2020 https://hal.science/hal-03009220 https://hal.science/hal-03009220/document https://hal.science/hal-03009220/file/Sogacheva%20et%20al%202020.pdf https://doi.org/10.5194/acp-20-2031-2020 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-20-2031-2020 hal-03009220 https://hal.science/hal-03009220 https://hal.science/hal-03009220/document https://hal.science/hal-03009220/file/Sogacheva%20et%20al%202020.pdf doi:10.5194/acp-20-2031-2020 info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-03009220 Atmospheric Chemistry and Physics, 2020, 20 (4), pp.2031 - 2056. ⟨10.5194/acp-20-2031-2020⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2020 ftunivlille https://doi.org/10.5194/acp-20-2031-2020 2024-01-31T17:56:21Z International audience Satellite instruments provide a vantage point for studying aerosol loading consistently over different regions of the world. However, the typical lifetime of a single satellite platform is on the order of 5-15 years; thus, for climate studies, the use of multiple satellite sensors should be considered. Discrepancies exist between aerosol optical depth (AOD) products due to differences in their information content , spatial and temporal sampling, calibration, cloud masking , and algorithmic assumptions. Users of satellite-based AOD time-series are confronted with the challenge of choosing an appropriate dataset for the intended application. In this study, 16 monthly AOD products obtained from different satellite sensors and with different algorithms were inter-compared and evaluated against Aerosol Robotic Network (AERONET) monthly AOD. Global and regional analyses indicate that products tend to agree qualitatively on the annual, seasonal and monthly timescales but may be offset in magnitude. Several approaches were then investigated to merge the AOD records from different satellites and create an optimised AOD dataset. With few exceptions, all merging approaches lead to similar results, indicating the robustness and stability of the merged AOD products. We introduce a grid-ded monthly AOD merged product for the period 1995-2017. We show that the quality of the merged product is as least as good as that of individual products. Optimal agreement of the AOD merged product with AERONET further demonstrates the advantage of merging multiple products. This merged dataset provides a long-term perspective on AOD changes over different regions of the world, and users are encouraged to use this dataset. Article in Journal/Newspaper Aerosol Robotic Network LillOA (HAL Lille Open Archive, Université de Lille) Atmospheric Chemistry and Physics 20 4 2031 2056 |
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collection |
LillOA (HAL Lille Open Archive, Université de Lille) |
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ftunivlille |
language |
English |
topic |
[SDE]Environmental Sciences |
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[SDE]Environmental Sciences Sogacheva, Larisa Popp, Thomas Sayer, Andrew, M Dubovik, O. Garay, Michael, J Heckel, Andreas Hsu, N. Christina, Christina Jethva, Hiren Kahn, Ralph, A Kolmonen, Pekka Kosmale, Miriam de Leeuw, Gerrit Levy, Robert, C Litvinov, Pavel Lyapustin, Alexei North, Peter Torres, Omar Arola, Antti Merging regional and global aerosol optical depth records from major available satellite products |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Satellite instruments provide a vantage point for studying aerosol loading consistently over different regions of the world. However, the typical lifetime of a single satellite platform is on the order of 5-15 years; thus, for climate studies, the use of multiple satellite sensors should be considered. Discrepancies exist between aerosol optical depth (AOD) products due to differences in their information content , spatial and temporal sampling, calibration, cloud masking , and algorithmic assumptions. Users of satellite-based AOD time-series are confronted with the challenge of choosing an appropriate dataset for the intended application. In this study, 16 monthly AOD products obtained from different satellite sensors and with different algorithms were inter-compared and evaluated against Aerosol Robotic Network (AERONET) monthly AOD. Global and regional analyses indicate that products tend to agree qualitatively on the annual, seasonal and monthly timescales but may be offset in magnitude. Several approaches were then investigated to merge the AOD records from different satellites and create an optimised AOD dataset. With few exceptions, all merging approaches lead to similar results, indicating the robustness and stability of the merged AOD products. We introduce a grid-ded monthly AOD merged product for the period 1995-2017. We show that the quality of the merged product is as least as good as that of individual products. Optimal agreement of the AOD merged product with AERONET further demonstrates the advantage of merging multiple products. This merged dataset provides a long-term perspective on AOD changes over different regions of the world, and users are encouraged to use this dataset. |
author2 |
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) |
format |
Article in Journal/Newspaper |
author |
Sogacheva, Larisa Popp, Thomas Sayer, Andrew, M Dubovik, O. Garay, Michael, J Heckel, Andreas Hsu, N. Christina, Christina Jethva, Hiren Kahn, Ralph, A Kolmonen, Pekka Kosmale, Miriam de Leeuw, Gerrit Levy, Robert, C Litvinov, Pavel Lyapustin, Alexei North, Peter Torres, Omar Arola, Antti |
author_facet |
Sogacheva, Larisa Popp, Thomas Sayer, Andrew, M Dubovik, O. Garay, Michael, J Heckel, Andreas Hsu, N. Christina, Christina Jethva, Hiren Kahn, Ralph, A Kolmonen, Pekka Kosmale, Miriam de Leeuw, Gerrit Levy, Robert, C Litvinov, Pavel Lyapustin, Alexei North, Peter Torres, Omar Arola, Antti |
author_sort |
Sogacheva, Larisa |
title |
Merging regional and global aerosol optical depth records from major available satellite products |
title_short |
Merging regional and global aerosol optical depth records from major available satellite products |
title_full |
Merging regional and global aerosol optical depth records from major available satellite products |
title_fullStr |
Merging regional and global aerosol optical depth records from major available satellite products |
title_full_unstemmed |
Merging regional and global aerosol optical depth records from major available satellite products |
title_sort |
merging regional and global aerosol optical depth records from major available satellite products |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03009220 https://hal.science/hal-03009220/document https://hal.science/hal-03009220/file/Sogacheva%20et%20al%202020.pdf https://doi.org/10.5194/acp-20-2031-2020 |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-03009220 Atmospheric Chemistry and Physics, 2020, 20 (4), pp.2031 - 2056. ⟨10.5194/acp-20-2031-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-20-2031-2020 hal-03009220 https://hal.science/hal-03009220 https://hal.science/hal-03009220/document https://hal.science/hal-03009220/file/Sogacheva%20et%20al%202020.pdf doi:10.5194/acp-20-2031-2020 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-20-2031-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
4 |
container_start_page |
2031 |
op_container_end_page |
2056 |
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1792046432897728512 |