DUACS DT2018: 25 years of reprocessed sea level altimetry products

For more than 20 years, the multi-satellite Data Unification and Altimeter Combination System (DUACS) has been providing near-real-Time (NRT) and delayed-Time (DT) altimetry products. DUACS datasets range from along-Track measurements to multi-mission sea level anomaly (SLA) and absolute dynamic top...

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Autores: Taburet, Guillaume, Sánchez-Román, Antonio, Ballarotta, Maxime, Pujol, Isabelle, Legeais, Jean-François, Fournier, Florent, Faugère, Yannice, Dibarboure, Gérald
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/204430
Acceso en línea:http://hdl.handle.net/10261/204430
Access Level:acceso abierto
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spelling DUACS DT2018: 25 years of reprocessed sea level altimetry productsTaburet, GuillaumeSánchez-Román, AntonioBallarotta, MaximePujol, IsabelleLegeais, Jean-FrançoisFournier, FlorentFaugère, YanniceDibarboure, GéraldFor more than 20 years, the multi-satellite Data Unification and Altimeter Combination System (DUACS) has been providing near-real-Time (NRT) and delayed-Time (DT) altimetry products. DUACS datasets range from along-Track measurements to multi-mission sea level anomaly (SLA) and absolute dynamic topography (ADT) maps. The DUACS DT2018 ensemble of products is the most recent and major release. For this, 25 years of altimeter data have been reprocessed and are available through the Copernicus Marine Environment Monitoring Service (CMEMS) and the Copernicus Climate Change Service (C3S).Several changes were implemented in DT2018 processing in order to improve the product quality. New altimetry standards and geophysical corrections were used, data selection was refined and optimal interpolation (OI) parameters were reviewed for global and regional map generation.This paper describes the extensive assessment of DT2018 reprocessing. The error budget associated with DT2018 products at global and regional scales was defined and improvements on the previous version were quantified (DT2014; Pujol et al., 2016). DT2018 mesoscale errors were estimated using independent and in situ measurements. They have been reduced by nearly 3 % to 4 % for global and regional products compared to DT2014. This reduction is even greater in coastal areas (up to 10 %) where it is directly linked to the geophysical corrections applied to DT2018 processing. The conclusions are very similar concerning geostrophic currents, for which error was globally reduced by around 5 % and as much as 10 % in coastal areas.The DT2018 reprocessing exercise was supported by the CNES/SALP project and the CMEMS and C3S services funded by the European Union. Global L3 Sentinel-3 production is coordinated by EUMETSAT and funded by the European Union.European Geosciences UnionEuropean CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020192020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/204430reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://doi.org/10.5194/os-15-1207-2019Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2044302026-05-22T06:33:51Z
dc.title.none.fl_str_mv DUACS DT2018: 25 years of reprocessed sea level altimetry products
title DUACS DT2018: 25 years of reprocessed sea level altimetry products
spellingShingle DUACS DT2018: 25 years of reprocessed sea level altimetry products
Taburet, Guillaume
title_short DUACS DT2018: 25 years of reprocessed sea level altimetry products
title_full DUACS DT2018: 25 years of reprocessed sea level altimetry products
title_fullStr DUACS DT2018: 25 years of reprocessed sea level altimetry products
title_full_unstemmed DUACS DT2018: 25 years of reprocessed sea level altimetry products
title_sort DUACS DT2018: 25 years of reprocessed sea level altimetry products
dc.creator.none.fl_str_mv Taburet, Guillaume
Sánchez-Román, Antonio
Ballarotta, Maxime
Pujol, Isabelle
Legeais, Jean-François
Fournier, Florent
Faugère, Yannice
Dibarboure, Gérald
author Taburet, Guillaume
author_facet Taburet, Guillaume
Sánchez-Román, Antonio
Ballarotta, Maxime
Pujol, Isabelle
Legeais, Jean-François
Fournier, Florent
Faugère, Yannice
Dibarboure, Gérald
author_role author
author2 Sánchez-Román, Antonio
Ballarotta, Maxime
Pujol, Isabelle
Legeais, Jean-François
Fournier, Florent
Faugère, Yannice
Dibarboure, Gérald
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description For more than 20 years, the multi-satellite Data Unification and Altimeter Combination System (DUACS) has been providing near-real-Time (NRT) and delayed-Time (DT) altimetry products. DUACS datasets range from along-Track measurements to multi-mission sea level anomaly (SLA) and absolute dynamic topography (ADT) maps. The DUACS DT2018 ensemble of products is the most recent and major release. For this, 25 years of altimeter data have been reprocessed and are available through the Copernicus Marine Environment Monitoring Service (CMEMS) and the Copernicus Climate Change Service (C3S).Several changes were implemented in DT2018 processing in order to improve the product quality. New altimetry standards and geophysical corrections were used, data selection was refined and optimal interpolation (OI) parameters were reviewed for global and regional map generation.This paper describes the extensive assessment of DT2018 reprocessing. The error budget associated with DT2018 products at global and regional scales was defined and improvements on the previous version were quantified (DT2014; Pujol et al., 2016). DT2018 mesoscale errors were estimated using independent and in situ measurements. They have been reduced by nearly 3 % to 4 % for global and regional products compared to DT2014. This reduction is even greater in coastal areas (up to 10 %) where it is directly linked to the geophysical corrections applied to DT2018 processing. The conclusions are very similar concerning geostrophic currents, for which error was globally reduced by around 5 % and as much as 10 % in coastal areas.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/204430
url http://hdl.handle.net/10261/204430
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://doi.org/10.5194/os-15-1207-2019
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv European Geosciences Union
publisher.none.fl_str_mv European Geosciences Union
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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