Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3
We present the first extended validation of a new SYNERGY global aerosol product (SY_2_AOD), which is based on synergistic use of data from the Ocean and Land Color Instrument (OLCI) and the Sea and Land Surface Temperature Radiometer (SLSTR) sensors aboard the Copernicus Sentinel-3A (S3A) and Senti...
Published in: | Atmospheric Measurement Techniques |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5194/amt-15-5289-2022 https://noa.gwlb.de/receive/cop_mods_00062671 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061893/amt-15-5289-2022.pdf https://amt.copernicus.org/articles/15/5289/2022/amt-15-5289-2022.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00062671 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00062671 2023-05-15T13:06:54+02:00 Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3 Sogacheva, Larisa Denisselle, Matthieu Kolmonen, Pekka Virtanen, Timo H. North, Peter Henocq, Claire Scifoni, Silvia Dransfeld, Steffen 2022-09 electronic https://doi.org/10.5194/amt-15-5289-2022 https://noa.gwlb.de/receive/cop_mods_00062671 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061893/amt-15-5289-2022.pdf https://amt.copernicus.org/articles/15/5289/2022/amt-15-5289-2022.pdf eng eng Copernicus Publications Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-15-5289-2022 https://noa.gwlb.de/receive/cop_mods_00062671 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061893/amt-15-5289-2022.pdf https://amt.copernicus.org/articles/15/5289/2022/amt-15-5289-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/amt-15-5289-2022 2022-09-25T23:11:55Z We present the first extended validation of a new SYNERGY global aerosol product (SY_2_AOD), which is based on synergistic use of data from the Ocean and Land Color Instrument (OLCI) and the Sea and Land Surface Temperature Radiometer (SLSTR) sensors aboard the Copernicus Sentinel-3A (S3A) and Sentinel-3B (S3B) satellites. Validation covers period from 14 January 2020 to 30 September 2021. Several approaches, including statistical analysis, time series analysis, and comparison with similar aerosol products from the other spaceborne sensor, the Moderate Resolution Imaging Spectroradiometer (MODIS), were applied for validation and evaluation of S3A and S3B SY_2 aerosol products, including aerosol optical depth (AOD) provided at different wavelengths, AOD pixel-level uncertainties, fine-mode AOD, and Angström exponent. Over ocean, the performance of SY_2 AOD (syAOD) retrieved at 550 nm is good: for S3A and S3B, Pearson correlation coefficients with the Maritime Aerosol Network (MAN) component of the AErosol RObotic NETwork (AERONET) are 0.88 and 0.85, respectively; 88.6 % and 89.5 % of pixels fit into the MODIS error envelope (EE) of ±0.05 ± 0.2 × AOD. Over land, correlation coefficients with AERONET AOD (aAOD) are 0.60 and 0.63 for S3A and S3B, respectively; 51.4 % and 57.9 % of pixels fit into MODIS EE. Reduced performance over land is expected since the surface reflectance and angular distribution of scattering are higher and more difficult to predict over land than over ocean. The results are affected by a large number of outliers. Evaluation of the per-retrieval uncertainty with the χ2 test indicates that syAOD prognostic uncertainties (PU) are slightly underestimated (χ2 = 3.1); if outliers are removed, PU describes the syAOD error well (χ2 = 1.6). The regional analysis of the Angström exponent, which relates to the aerosol size distribution, shows spatial correlation with expected sources. For 40 % of the matchups with AERONET in the Northern Hemisphere (NH) and for 60 % of the matchups in the Southern ... Article in Journal/Newspaper Aerosol Robotic Network Niedersächsisches Online-Archiv NOA Atmospheric Measurement Techniques 15 18 5289 5322 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Sogacheva, Larisa Denisselle, Matthieu Kolmonen, Pekka Virtanen, Timo H. North, Peter Henocq, Claire Scifoni, Silvia Dransfeld, Steffen Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3 |
topic_facet |
article Verlagsveröffentlichung |
description |
We present the first extended validation of a new SYNERGY global aerosol product (SY_2_AOD), which is based on synergistic use of data from the Ocean and Land Color Instrument (OLCI) and the Sea and Land Surface Temperature Radiometer (SLSTR) sensors aboard the Copernicus Sentinel-3A (S3A) and Sentinel-3B (S3B) satellites. Validation covers period from 14 January 2020 to 30 September 2021. Several approaches, including statistical analysis, time series analysis, and comparison with similar aerosol products from the other spaceborne sensor, the Moderate Resolution Imaging Spectroradiometer (MODIS), were applied for validation and evaluation of S3A and S3B SY_2 aerosol products, including aerosol optical depth (AOD) provided at different wavelengths, AOD pixel-level uncertainties, fine-mode AOD, and Angström exponent. Over ocean, the performance of SY_2 AOD (syAOD) retrieved at 550 nm is good: for S3A and S3B, Pearson correlation coefficients with the Maritime Aerosol Network (MAN) component of the AErosol RObotic NETwork (AERONET) are 0.88 and 0.85, respectively; 88.6 % and 89.5 % of pixels fit into the MODIS error envelope (EE) of ±0.05 ± 0.2 × AOD. Over land, correlation coefficients with AERONET AOD (aAOD) are 0.60 and 0.63 for S3A and S3B, respectively; 51.4 % and 57.9 % of pixels fit into MODIS EE. Reduced performance over land is expected since the surface reflectance and angular distribution of scattering are higher and more difficult to predict over land than over ocean. The results are affected by a large number of outliers. Evaluation of the per-retrieval uncertainty with the χ2 test indicates that syAOD prognostic uncertainties (PU) are slightly underestimated (χ2 = 3.1); if outliers are removed, PU describes the syAOD error well (χ2 = 1.6). The regional analysis of the Angström exponent, which relates to the aerosol size distribution, shows spatial correlation with expected sources. For 40 % of the matchups with AERONET in the Northern Hemisphere (NH) and for 60 % of the matchups in the Southern ... |
format |
Article in Journal/Newspaper |
author |
Sogacheva, Larisa Denisselle, Matthieu Kolmonen, Pekka Virtanen, Timo H. North, Peter Henocq, Claire Scifoni, Silvia Dransfeld, Steffen |
author_facet |
Sogacheva, Larisa Denisselle, Matthieu Kolmonen, Pekka Virtanen, Timo H. North, Peter Henocq, Claire Scifoni, Silvia Dransfeld, Steffen |
author_sort |
Sogacheva, Larisa |
title |
Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3 |
title_short |
Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3 |
title_full |
Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3 |
title_fullStr |
Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3 |
title_full_unstemmed |
Extended validation and evaluation of the OLCI–SLSTR SYNERGY aerosol product (SY_2_AOD) on Sentinel-3 |
title_sort |
extended validation and evaluation of the olci–slstr synergy aerosol product (sy_2_aod) on sentinel-3 |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/amt-15-5289-2022 https://noa.gwlb.de/receive/cop_mods_00062671 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061893/amt-15-5289-2022.pdf https://amt.copernicus.org/articles/15/5289/2022/amt-15-5289-2022.pdf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-15-5289-2022 https://noa.gwlb.de/receive/cop_mods_00062671 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00061893/amt-15-5289-2022.pdf https://amt.copernicus.org/articles/15/5289/2022/amt-15-5289-2022.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/amt-15-5289-2022 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
15 |
container_issue |
18 |
container_start_page |
5289 |
op_container_end_page |
5322 |
_version_ |
1766025766001180672 |