Merging regional and global aerosol optical depth records from major available satellite products
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 consider...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
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Copernicus Publications
2020
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Online Access: | https://doi.org/10.5194/acp-20-2031-2020 https://noa.gwlb.de/receive/cop_mods_00050776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050433/acp-20-2031-2020.pdf https://acp.copernicus.org/articles/20/2031/2020/acp-20-2031-2020.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00050776 2023-05-15T13:06:32+02:00 Merging regional and global aerosol optical depth records from major available satellite products Sogacheva, Larisa Popp, Thomas Sayer, Andrew M. Dubovik, Oleg Garay, Michael J. Heckel, Andreas Hsu, N. 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 2020-02 electronic https://doi.org/10.5194/acp-20-2031-2020 https://noa.gwlb.de/receive/cop_mods_00050776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050433/acp-20-2031-2020.pdf https://acp.copernicus.org/articles/20/2031/2020/acp-20-2031-2020.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-20-2031-2020 https://noa.gwlb.de/receive/cop_mods_00050776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050433/acp-20-2031-2020.pdf https://acp.copernicus.org/articles/20/2031/2020/acp-20-2031-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/acp-20-2031-2020 2022-02-08T22:36:43Z 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 gridded 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 Niedersächsisches Online-Archiv NOA Atmospheric Chemistry and Physics 20 4 2031 2056 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Sogacheva, Larisa Popp, Thomas Sayer, Andrew M. Dubovik, Oleg Garay, Michael J. Heckel, Andreas Hsu, N. 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 |
article Verlagsveröffentlichung |
description |
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 gridded 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. |
format |
Article in Journal/Newspaper |
author |
Sogacheva, Larisa Popp, Thomas Sayer, Andrew M. Dubovik, Oleg Garay, Michael J. Heckel, Andreas Hsu, N. 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, Oleg Garay, Michael J. Heckel, Andreas Hsu, N. 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 |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-20-2031-2020 https://noa.gwlb.de/receive/cop_mods_00050776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050433/acp-20-2031-2020.pdf https://acp.copernicus.org/articles/20/2031/2020/acp-20-2031-2020.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-20-2031-2020 https://noa.gwlb.de/receive/cop_mods_00050776 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050433/acp-20-2031-2020.pdf https://acp.copernicus.org/articles/20/2031/2020/acp-20-2031-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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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1766009577236594688 |