Articles | Volume 15, issue 5
https://doi.org/10.5194/os-15-1207-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-15-1207-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
12 Sep 2019
Research article |
| 12 Sep 2019
| 12 Sep 2019
DUACS DT2018: 25 years of reprocessed sea level altimetry products
Guillaume Taburet
CORRESPONDING AUTHOR
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne, France
Antonio Sanchez-Roman
Instituto Mediterráneo de Estudios Avanzados, C/Miquel
Marquès, 21, 07190 Esporles, Illes Balears, Spain
Maxime Ballarotta
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne, France
Marie-Isabelle Pujol
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne, France
Jean-François Legeais
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne, France
Florent Fournier
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne, France
Yannice Faugere
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne, France
Gerald Dibarboure
Centre National d'Etudes Spatiales, 18 avenue Edouard Belin, 31400 Toulouse, France
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Maxime Ballarotta, Clément Ubelmann, Marie-Isabelle Pujol, Guillaume Taburet, Florent Fournier, Jean-François Legeais, Yannice Faugère, Antoine Delepoulle, Dudley Chelton, Gérald Dibarboure, and Nicolas Picot
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Altimetry provides sea surface height (SSH) data along one-dimensional tracks. For many applications, the tracks are interpolated in space and time to provide gridded SSH maps. The operational SSH gridded products filter out the small-scale signals measured on the tracks. This paper evaluates the performances of a recently implemented dynamical method to retrieve the small-scale signals from real SSH data. We show a net improvement in the quality of SSH maps when compared to independent data.
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Satellite altimeter observations show that daily mean significant wave heights (SWH) and extreme SWH values have increased in the Southern Ocean over the last two decades. In winter in the North Atlantic, SWH has increased above 45° N and decreased below 45° N. Extreme SWHs, represented by 100-year return levels, have increased in the North Atlantic and in the eastern tropical Pacific. This study also reveals the need for longer and more homogeneous altimetric time series.
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Ocean Sci., 19, 793–809, https://doi.org/10.5194/os-19-793-2023, https://doi.org/10.5194/os-19-793-2023, 2023
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Earth Syst. Sci. Data, 15, 295–315, https://doi.org/10.5194/essd-15-295-2023, https://doi.org/10.5194/essd-15-295-2023, 2023
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The SSH analysis and 7 d forecast error will be globally reduced by almost 50 %. Surface current forecast errors should be equivalent to today’s surface current analysis errors or alternatively will be improved (variance error reduction) by 30 % at the surface and 50 % for 300 m depth.
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Ocean Sci., 18, 469–481, https://doi.org/10.5194/os-18-469-2022, https://doi.org/10.5194/os-18-469-2022, 2022
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Maxime Ballarotta, Clément Ubelmann, Marie-Isabelle Pujol, Guillaume Taburet, Florent Fournier, Jean-François Legeais, Yannice Faugère, Antoine Delepoulle, Dudley Chelton, Gérald Dibarboure, and Nicolas Picot
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This study investigates the resolving capabilities of the DUACS gridded products delivered through the CMEMS catalogue. Our method is based on the noise-to-signal ratio approach. While altimeter along-track data resolve scales on the order of a few tens of kilometers, we found that the merging of these along-track data into continuous maps in time and space leads to effective resolution ranging from ~ 800 km wavelength at the Equator to 100 km wavelength at high latitude.
Yuri Cotroneo, Giuseppe Aulicino, Simon Ruiz, Antonio Sánchez Román, Marc Torner Tomàs, Ananda Pascual, Giannetta Fusco, Emma Heslop, Joaquín Tintoré, and Giorgio Budillon
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Antonio Sanchez-Roman, Gabriel Jorda, Gianmaria Sannino, and Damia Gomis
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Fabrice Ardhuin, Yevgueny Aksenov, Alvise Benetazzo, Laurent Bertino, Peter Brandt, Eric Caubet, Bertrand Chapron, Fabrice Collard, Sophie Cravatte, Jean-Marc Delouis, Frederic Dias, Gérald Dibarboure, Lucile Gaultier, Johnny Johannessen, Anton Korosov, Georgy Manucharyan, Dimitris Menemenlis, Melisa Menendez, Goulven Monnier, Alexis Mouche, Frédéric Nouguier, George Nurser, Pierre Rampal, Ad Reniers, Ernesto Rodriguez, Justin Stopa, Céline Tison, Clément Ubelmann, Erik van Sebille, and Jiping Xie
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The Sea surface KInematics Multiscale (SKIM) monitoring mission is a proposal for a future satellite that is designed to measure ocean currents and waves. Using a Doppler radar, the accurate measurement of currents requires the removal of the mean velocity due to ocean wave motions. This paper describes the main processing steps needed to produce currents and wave data from the radar measurements. With this technique, SKIM can provide unprecedented coverage and resolution, over the global ocean.
Antonio Sánchez-Román, Simón Ruiz, Ananda Pascual, Baptiste Mourre, and Stéphanie Guinehut
Ocean Sci., 13, 223–234, https://doi.org/10.5194/os-13-223-2017, https://doi.org/10.5194/os-13-223-2017, 2017
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In this work we investigate the capability of the Argo array in the Mediterranean Sea to capture mesoscale circulation structures (diameter of around 150 km). To do that we conduct several experiments to simulate different spatial sampling configurations of the Argo array in the basin. Results show that the actual Argo array in the Mediterranean (2° × 2°) might be enlarged until a spatial resolution of nearly 75 × 75 km (450 floats) in order to capture the mesoscale signal.
Marie-Isabelle Pujol, Yannice Faugère, Guillaume Taburet, Stéphanie Dupuy, Camille Pelloquin, Michael Ablain, and Nicolas Picot
Ocean Sci., 12, 1067–1090, https://doi.org/10.5194/os-12-1067-2016, https://doi.org/10.5194/os-12-1067-2016, 2016
F. d'Ovidio, A. Della Penna, T. W. Trull, F. Nencioli, M.-I. Pujol, M.-H. Rio, Y.-H. Park, C. Cotté, M. Zhou, and S. Blain
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Field campaigns are instrumental in providing ground truth for understanding and modeling global ocean biogeochemical budgets. A survey however can only inspect a fraction of the global oceans, typically a region hundreds of kilometers wide for a temporal window of the order of (at most) several weeks. In this spatiotemporal domain, mesoscale variability can mask climatological contrasts. Here we propose the use of multisatellite-based Lagrangian diagnostics to solve this issue.
M. Ballarotta, F. Roquet, S. Falahat, Q. Zhang, and G. Madec
Clim. Past Discuss., https://doi.org/10.5194/cpd-11-3597-2015, https://doi.org/10.5194/cpd-11-3597-2015, 2015
Revised manuscript not accepted
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We investigate the impact of the ocean geothermal heating (OGH) on a glacial ocean state using numerical simulations. We found that the OGH is a significant forcing of the abyssal ocean and thermohaline circulation. Applying the OGH warms the Antarctic Bottom Water by ~0.4°C and strengthens the deep circulation by 15% to 30%. The geothermally heated waters are advected from the Indo-Pacific to the North Atlantic basin, indirectly favouring the deep convection in the North Atlantic.
M. Ballarotta, S. Falahat, L. Brodeau, and K. Döös
Ocean Sci., 10, 907–921, https://doi.org/10.5194/os-10-907-2014, https://doi.org/10.5194/os-10-907-2014, 2014
M. Ballarotta, L. Brodeau, J. Brandefelt, P. Lundberg, and K. Döös
Clim. Past, 9, 2669–2686, https://doi.org/10.5194/cp-9-2669-2013, https://doi.org/10.5194/cp-9-2669-2013, 2013
M. Ballarotta, L. Brodeau, J. Brandefelt, P. Lundberg, and K. Döös
Clim. Past Discuss., https://doi.org/10.5194/cpd-9-297-2013, https://doi.org/10.5194/cpd-9-297-2013, 2013
Revised manuscript has not been submitted
Related subject area
Approach: Operational Oceanography | Depth range: Surface | Geographical range: All Geographic Regions | Phenomena: Sea Level
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ENSURF: multi-model sea level forecast – implementation and validation results for the IBIROOS and Western Mediterranean regions
Maxime Ballarotta, Clément Ubelmann, Marie-Isabelle Pujol, Guillaume Taburet, Florent Fournier, Jean-François Legeais, Yannice Faugère, Antoine Delepoulle, Dudley Chelton, Gérald Dibarboure, and Nicolas Picot
Ocean Sci., 15, 1091–1109, https://doi.org/10.5194/os-15-1091-2019, https://doi.org/10.5194/os-15-1091-2019, 2019
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Simon Verrier, Pierre-Yves Le Traon, and Elisabeth Remy
Ocean Sci., 13, 1077–1092, https://doi.org/10.5194/os-13-1077-2017, https://doi.org/10.5194/os-13-1077-2017, 2017
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Ocean Sci., 8, 211–226, https://doi.org/10.5194/os-8-211-2012, https://doi.org/10.5194/os-8-211-2012, 2012
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Short summary
This paper deals with sea level altimetery products. These geophysical data are distributed as along-track and gridded data through Copernicus programs CMEMS and C3S. We present in detail a new reprocessing of the data (DT2018) from 1993 to 2017. The main changes and their impacts since the last version (DT2014) are carefully discussed. This comparison is made using an independent dataset. DT2018 sea level products are improved at the global and regional scale, especially in coastal areas.
This paper deals with sea level altimetery products. These geophysical data are distributed as...
