Articles | Volume 12, issue 5
https://doi.org/10.5194/os-12-1067-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/os-12-1067-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
09 Sep 2016
Research article |
| 09 Sep 2016
DUACS DT2014: the new multi-mission altimeter data set reprocessed over 20 years
Marie-Isabelle Pujol
CORRESPONDING AUTHOR
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne,
France
Yannice Faugère
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne,
France
Guillaume Taburet
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne,
France
Stéphanie Dupuy
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne,
France
Camille Pelloquin
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne,
France
Michael Ablain
Collecte Localisation Satellites, Parc Technologique du Canal, 8–10 rue Hermès, 31520 Ramonville-Saint-Agne,
France
Nicolas Picot
Centre National Etudes Spatiales, 18 Avenue Edouard Belin, 31400 Toulouse,
France
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J.-F. Legeais, M. Ablain, and S. Thao
Ocean Sci., 10, 893–905, https://doi.org/10.5194/os-10-893-2014, https://doi.org/10.5194/os-10-893-2014, 2014
Related subject area
Approach: Remote Sensing | Depth range: Surface | Geographical range: All Geographic Regions | Phenomena: Sea Level
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The Genealogical Evolution Model (GEM) is an efficient logical model used to track dynamic evolution of mesoscale eddies in the ocean. It can distinguish different dynamic processes (e.g., merging and splitting) within a dynamic evolution pattern with a two-dimensional vector. All of the computational steps are linear and do not include iteration. It is very fast and is potentially useful for studying dynamic processes in other related fields, e.g., the dynamics of cyclones in meteorology.
Christopher G. Piecuch and Katherine J. Quinn
Ocean Sci., 12, 1165–1177, https://doi.org/10.5194/os-12-1165-2016, https://doi.org/10.5194/os-12-1165-2016, 2016
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We use satellite and in situ data to elucidate global-mean sea level (GMSL) changes related to El Niño-Southern Oscillation (ENSO) over 2005–2015. Steric and mass effects make comparable contributions to the GMSL budget during ENSO, in contrast to previous interpretations based largely on hydrological models, which emphasize mass contributions. Results exemplify the usefulness of the Global Ocean Observing System for understanding the Earth's radiation imbalance and hydrological cycle.
Loren Carrere, Yannice Faugère, and Michaël Ablain
Ocean Sci., 12, 825–842, https://doi.org/10.5194/os-12-825-2016, https://doi.org/10.5194/os-12-825-2016, 2016
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New dynamic atmospheric (DAC_ERA) and dry tropospheric (DT_ERA) correction have been computed for the altimeter period using the ERA-Interim meteorological reanalysis. The corrections improve sea level estimations in Southern Ocean and in shallow waters; the impact is the most important for the first decade of altimetry, when operational meteorological models had a weaker quality. DT_ERA remains better in the recent period. New corrections significantly impact long-term regional trends.
L. Zawadzki and M. Ablain
Ocean Sci., 12, 9–18, https://doi.org/10.5194/os-12-9-2016, https://doi.org/10.5194/os-12-9-2016, 2016
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The reference mean sea level (MSL) record, essential for understanding climate evolution, is derived from the altimetric measurements of the TOPEX/Poseidon mission, followed by Jason-1 and later Jason-2 on the same orbit. Soon, Jason-3 will be launched on the same historical orbit, followed by Sentinel-3a on a new one. This paper shows linking missions with the same orbit enables meeting climate user requirements regarding the MSL trend while using Sentinel-3a would increase the uncertainty.
Q. Y. Li and L. Sun
Ocean Sci., 11, 269–273, https://doi.org/10.5194/os-11-269-2015, https://doi.org/10.5194/os-11-269-2015, 2015
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This study established a splitting strategy that could separate multinuclear eddies into mononuclear eddies. As the values of eddy parameters (e.g. SLA, geostrophic potential vorticity, Okubo–Weiss parameter) are similar to basins in a map, the natural divisions of the basins are the watersheds between them. It can also be applied to automatic identification of troughs and ridges from weather charts. We denoted it the Universal Splitting Technology for Circulations (USTC) method.
M. Ablain, A. Cazenave, G. Larnicol, M. Balmaseda, P. Cipollini, Y. Faugère, M. J. Fernandes, O. Henry, J. A. Johannessen, P. Knudsen, O. Andersen, J. Legeais, B. Meyssignac, N. Picot, M. Roca, S. Rudenko, M. G. Scharffenberg, D. Stammer, G. Timms, and J. Benveniste
Ocean Sci., 11, 67–82, https://doi.org/10.5194/os-11-67-2015, https://doi.org/10.5194/os-11-67-2015, 2015
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This paper presents various respective data improvements achieved within the European Space Agency (ESA) Climate Change Initiative (ESA CCI) project on sea level during its first phase (2010-2013), using multi-mission satellite altimetry data over the 1993-2010 time span.
J.-F. Legeais, M. Ablain, and S. Thao
Ocean Sci., 10, 893–905, https://doi.org/10.5194/os-10-893-2014, https://doi.org/10.5194/os-10-893-2014, 2014
P. Y. Le Traon
Ocean Sci., 9, 901–915, https://doi.org/10.5194/os-9-901-2013, https://doi.org/10.5194/os-9-901-2013, 2013
D. P. Chambers and J. A. Bonin
Ocean Sci., 8, 859–868, https://doi.org/10.5194/os-8-859-2012, https://doi.org/10.5194/os-8-859-2012, 2012
Cited articles
Ablain, M., Philipps, S., Picot, N., and Bronner, E.: Jason-2 global statistical assessment and cross-calibration with Jason-1, Mar. Geod., OSTM Jason-2 Calibration/Validation Special Edition – Part 1, 33, 162–185, https://doi.org/10.1080/01490419.2010.487805, 2010.
Ablain, M., Cazenave, A., Larnicol, G., Balmaseda, M., Cipollini, P., Faugère, Y., Fernandes, M. J., Henry, O., Johannessen, J. A., Knudsen, P., Andersen, O., Legeais, J., Meyssignac, B., Picot, N., Roca, M., Rudenko, S., Scharffenberg, M. G., Stammer, D., Timms, G., and Benveniste, J.: Improved sea level record over the satellite altimetry era (1993–2010) from the Climate Change Initiative project, Ocean Sci., 11, 67–82, https://doi.org/10.5194/os-11-67-2015, 2015.
Arbic, B. K., Scott, R. B., Chelton, D. B., Richman, J. G., and Shriver, J. F.: Effects on stencil width on surface ocean geostrophic velocity and vorticity estimation from gridded satellite altimeter data, J. Geophys. Res., 117, C03029, https://doi.org/10.1029/2011JC007367, 2012.
Arhan, M. and Colin de Verdiere, A.: Dynamics of eddy motions in the eastern North Atlantic, J. Phys. Oceanogr., 15, 153–170, 1985.
Aviso/DUACS: User Handbook Ssalto/Duacs: M(SLA) and M(ADT) Near-Real Time and Delayed-Time, SALP-MU-P-EA-21065-CLS, edition 4.1, May 2014, available at: http://www.aviso.altimetry.fr/fileadmin/documents/data/tools/hdbk_duacs.pdf (last access: 12 July 2015), 2014.
Aviso/SALP, SARAL/AltiKa Products Handbook, edition 2.4, available at: http://www.aviso.altimetry.fr/fileadmin/documents/data/tools/SARAL_Altika_products_handbook.pdf (last access: 19 July 2016), 2013.
Aviso/SALP: Jason-2 validation and cross calibration activities (Annual report 2014), edition 1.1, available at: http://www.aviso.altimetry.fr/fileadmin/documents/calval/validation_report/J2/annual_report_j2_2014.pdf (last access: 31 March 2016), 2015a.
Aviso/SALP, OSTM/Jason-2 Products Handbook, edition 1.9, available at: http://www.aviso.altimetry.fr/fileadmin/documents/data/tools/hdbk_j2.pdf (last access: 19 July 2016), 2015b.
Bretherton, F., Davis, R., and Fandry, C.: A technique for objective analysis and design of oceanographic experiments applied to MODE-73, Deep-Sea Res., 23, 559–582, 1976.
Capet, A., Mason, E., Ross, V., Troupin, C., Faugere, Y., Pujol, M.-I., and Pascual, A.: Implications of a Refined Description of Mesoscale Activity in the Eastern Boundary Upwelling Systems, Geophys. Res. Lett., 41, 7602–7610, https://doi.org/10.1002/2014GL061770, 2014.
Carrere, L., Faugère, Y., and Ablain, M.: Major improvement of altimetry sea level estimations using pressure-derived corrections based on ERA-Interim atmospheric reanalysis, Ocean Sci., 12, 825–842, https://doi.org/10.5194/os-12-825-2016, 2016.
Cartwright, D. E. and Tayler, R. J.: New computations of the tide-generating potential, Geophys. J. R. Astr. Soc., 23, 45–74, 1971.
Cartwright, D. E. and Edden, A. C.: Corrected tables of tidal harmonics, Geophys. J. R. Astr. Soc., 33, 253–264, 1973.
Carval, T., Keeley, R., Takatsuki, Y., Yoshida, T., Schmid, C., Goldsmith, R., Wong, A., Thresher, A., Tran, A., Loch, S., and Mccreadie, R.: Argo user's manual v3.2, https://doi.org/10.13155/29825, 2015.
Chelton, D., Dibarboure, G., Pujol, M.-I., Taburet, G., and Schlax, M. G.: The Spatial Resolution of AVISO Gridded Sea Surface Height Fields, OSTST Lake Constance, Germany, 28–31 October 2014, available at: http://meetings.aviso.altimetry.fr/fileadmin/user_upload/tx_ausyclsseminar/files/29Red0900-1_OSTST_Chelton.pdf (last access: 31 August 2016), 2014.
Chelton, D. B., Schlax, M. G., Samelson, R. M.: Global observations of nonlinear mesoscale eddies, Prog. Oceanogr., 91, 167–216, https://doi.org/10.1016/j.pocean.2011.01.002, 2011.
Couhert, A., Cerri, L., Legeais, J.-F., Ablain, M., Zelensky, N. P., Haines, B. J., Lemoine, F. G., Bertiger, W. I., Desai, S. D., and Otten, M.: Towards the 1 mm/y stability of the radial orbit error at regional scales, Adv. Space Res., 55, 2–23, https://doi.org/10.1016/j.asr.2014.06.041, 2015.
Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S. B., Hersbach, H., Hólm, E. V., Isaksen, L., Kållberg, P., Köhler, M., Matricardi, M., McNally, A. P., Monge-Sanz, B. M., Morcrette, J.-J., Park, B.-K., Peubey, C., de Rosnay, P., Tavolato, C., Thépaut, J.-N., and Vitart, F.: The ERA-Interim reanalysis: configuration and performance of the data assimilation system, Q. J. R. Meteorol. Soc., 137, 553–597, https://doi.org/10.1002/qj.828, 2011.
Dibarboure, G., Pujol, M.-I., Briol, F., Le Traon, P.-Y., Larnicol, G., Picot, N., Mertz, F., Escudier, P., Ablain, M., and Dufau, C.: Jason-2 in DUACS: first tandem results and impact on processing and products, Mar. Geod., OSTM Jason-2 Calibration/Validation Special Edition – Part 2, 34, 214–241, https://doi.org/10.1080/01490419.2011.584826, 2011.
Dibarboure, G., Boy, F., Desjonqueres, J. D., Labroue, S., Lasne, Y., Picot, N., Poisson, J. C., and Thibaut, P.: Investigating Short-Wavelength Correlated Errors on Low-Resolution Mode Altimetry, J. Atmos. Ocean. Technol., 31, 1337–1362, https://doi.org/10.1175/JTECH-D-13-00081.1, 2014.
d'Ovidio, F., Della Penna, A., Trull, T. W., Nencioli, F., Pujol, M.-I., Rio, M.-H., Park, Y.-H., Cotté, C., Zhou, M., and Blain, S.: The biogeochemical structuring role of horizontal stirring: Lagrangian perspectives on iron delivery downstream of the Kerguelen Plateau, Biogeosciences, 12, 5567–5581, https://doi.org/10.5194/bg-12-5567-2015, 2015.
Ducet, N., Le Traon, P.-Y., and Reverdun, G.: Global high-resolution mapping of ocean circulation from TOPEX/Poseidon and ERS-1 and -2, J. Geophys. Res., 105, 19477–19498, 2000.
Dufau, C., Orstynowicz, M., Dibarboure, G., Morrow, R., and La Traon, P.-Y.: Mesoscale Resolution Capability of altimetry: present & future, J. Geophys. Res, 121, 4910–4927, https://doi.org/10.1002/2015JC010904, 2016.
Dussurget, R., Birol, F., Morrow, R., and De Mey, P.: Fine Resolution Altimetry Data for a Regional Application in the Bay of Biscay, Mar. Geod., 34, 3–4, 447–476, 2011.
Escudier, R., Bouffard, J., Pascual, A., Poulain, P.-M., and Pujol, M.-I.: Improvement of coastal and mesoscale observation from space: Application to the northwestern Mediterranean Sea, Geophys. Res. Lett., 40, 2148–2153, https://doi.org/10.1002/grl.50324, 2013.
ESA SL_cci, SL-CCI Phase I: synthesis of additional activities, SLCCI_Synthesis_CCN-032, issue 1.3, available at: http://www.esa-sealevel-cci.org/webfm_send/246 (last access: 31 August 2016), 2015.
Fernandes, M. J., Lázaro, C., Ablain, M., and Pires, N.: Improved Wet Path Delays for all ESA and Reference altimetric missions, Remote Sens. Environ., 169, 50–74, https://doi.org/10.1016/j.rse.2015.07.023, 2015.
Fieguth, P., Menemenliss, D., Ho, T., Willsky, A., and Wunch, C.: Mapping Mediterranean Altimeter Data with a Multiresolution OptimalInterpolation Algorithm, J. Atmos. Ocean. Technol., 15, 535–546, 1998.
Griffin, D. and Cahill, M.: Assessment of Cryosat near-real-time sea level anomaly data using HF radar and SST imagery, Oral presentation, OSTST Venise, Italy 2012, available at: http://www.aviso.altimetry.fr/fileadmin/documents/OSTST/2012/oral/01_thursday_27/06_NRT_applications/07_NRT_Griffin.pdf (last access: 31 August 2016), 2012.
Holgate, S. J., Matthews, A., Woodworth, P. L., Rickards, L. J., Tamisiea, M. E., Bradshaw, E., Foden, P. R., Gordon, K. M., Jevrejeva, S., and Pugh, J.: New Data Systems and Products at the Permanent Service for Mean Sea Level, J. Coast. Res., 29, 493–504, https://doi.org/10.2112/JCOASTRES-D-12-00175.1, 2013.
Holgate, S. J., Matthews, A., Woodworth, P., Rickards, L. J., Tamisiea, M. E., Bradshaw, E., Foden, P. R., Gordon, K. M., Jevrejeva, S., and Pugh, J.: PSMSL, https://doi.org/10.2112/JCOASTRES-D-12-00175.1, 2016.
Hogg, A. McC., Meredith, M. P., Chambers, D. P., Abrahamsen, E. P., Hughes, C. W., and Morrison, A. K.: Recent trends in the Southern Ocean eddy field, J. Geophys. Res.-Oceans, 120, 257–267, https://doi.org/10.1002/2014JC010470, 2015.
Iijima, B. A., Harris, I. L., Ho, C. M., Lindqwiste, U. J., Mannucci, A. J., Pi, X., Reyes, M. J., Sparks, L. C., and Wilson, B. D.: Automated daily process for global ionospheric total electron content maps and satellite ocean altimeter ionospheric calibration based on Global Positioning System data, J. Atmos. Sol.-Terr. Phy., 61, 16, 1205–1218, 1999.
Juza, M., Escudier, R., Pascual, A., Pujol, M.-I., Taburet, G., Troupin, C., Mourre, B., and Tintoré, J.: Impacts of reprocessed altimetry on the surface circulation and variability of the Western Alboran Gyre, Adv. Space Res., 58, 277–288, https://doi.org/10.1016/j.asr.2016.05.026, 2016.
Lagerloef, G. S. E., Mitchum, G., Lukas, R., and Niiler, P.: Tropical Pacific near-surface currents estimated from altimeter, wind and drifter data, J. Geophys. Res., 104, 23313–2332, 1999.
Leben, R. R., Born, G. H., and Engebreth, B. N.: Operational Altimeter Data Processing for Mesoscale Monitoring, Mar. Geod., 25, 3–18, 2002.
Legeais, J.-F., Ablain, M., and Thao, S.: Evaluation of wet troposphere path delays from atmospheric reanalyses and radiometers and their impact on the altimeter sea level, Ocean Sci., 10, 893–905, https://doi.org/10.5194/os-10-893-2014, 2014.
Legeais, J.-F., Prandi, P., and Guinehut, S.: Analyses of altimetry errors using Argo and GRACE data, Ocean Sci., 12, 647–662, https://doi.org/10.5194/os-12-647-2016, 2016.
Le Traon, P. Y. and Hernandez, F.: Mapping of the oceanic mesoscale circulation: validation of satellite altimetry using surface drifters, J. Atmos. Ocean. Technol., 9, 687–698, 1992.
Le Traon, P.-Y. and Ogor, F.: ERS-1/2 orbit improvement using TOPEX/POSEIDON: The 2 cm challenge, J. Geophys. Res., 103, 8045–8057, 1998.
LeTraon, P.-Y. and Dibarboure, G.: Mesoscale Mapping Capabilities of Multiple-Satellite Altimeter Missions, J. Atmos. Ocean. Technol., 16, 1208–1223, 1999.
Le Traon, P.-Y., Gaspar, P., Bouyssel, F., and Makhmara, H.: Using TOPEX/Poseidon data to enhance ERS-1 data, J. Atmos. Ocean. Technol., 12, 161–170, 1995.
LeTraon, P.-Y, Faugere, Y., Hernamdez, F., Dorandeu, J., Mertz, F., and Abalin, M.: Can We Merge GEOSAT Follow-On with TOPEX/Poseidon and ERS-2 for an Improved Description of the Ocean Circulation?, J. Atmos. Ocean. Technol., 20, 889–895, 2003.
Lumpkin, R., Grodsky, S., Rio, M.-H., Centurioni, L., Carton, J., and Lee, D.: Removing spurious low-frequency variability in surface drifter velocities, J. Atmos. Ocean. Technol., 30, 353–360, https://doi.org/10.1175/JTECH-D-12-00139.1, 2013.
Marcos M., Pascual, A., and Pujol, M.-I.: Improved satellite altimeter mapped sea level anomalies in the Mediterranean Sea: A comparison with tide gauges, Adv. Space Res., 56, 596–604, https://doi.org/10.1016/j.asr.2015.04.027, 2015.
Mulet, S., Rio, M. H., Greiner, E., Picot, N., and Pascual, A.: New global Mean Dynamic Topography from a GOCE geoid model, altimeter measurements and oceanographic in-situ data, OSTST Boulder USA 2013, available at: http://www.aviso.altimetry.fr/fileadmin/documents/OSTST/2013/oral/mulet_MDT_CNES_CLS13.pdf (last access: 31 August 2016), 2013.
Ollivier, A., Faugère, Y., Picot, N., Ablain, M., Femenias, P., and Benveniste, J.: Envisat Ocean Altimeter Becoming Relevant for Mean Sea Level Trend Studies, Mar. Geodesy, 35, 118–136, 2012.
Pascual, A., Faugere, Y., Larnicol, G., and Le Traon, P.-Y.: Improved description of the ocean mesoscale variability by combining four satellite altimeters, Geophys. Res. Lett., 33, L02611, https://doi.org/10.1029/2005GL024633, 2006.
Permanent Service for Mean Sea Level (PSMSL): “Tide Gauge Data”, available at: http://www.psmsl.org/data/obtaining/, (last access 1 June 2014), 2016.
Philipps, S., Roinard, H., and Picot, N.: Jason-2 reprocessing impact on ocean data (cycles 001 to 145), Ref. CLS/DOS/NT/12-222., available at: http://www.aviso.altimetry.fr/fileadmin/documents/calval/validation_report/J2/Jason2ReprocessingReport-v2.1.pdf (last access: 12 July 2014), 2013a.
Philipps, S., Roinard, H., and Picot, N.: Jason-1 validation and cross calibration activities [Annual Report 2013], Ref. CLS/DOS/NT/13-226., available at: http://www.aviso.altimetry.fr/fileadmin/documents/calval/validation_report/annual_report_j1_2013.pdf (last access: 25 July 2014), 2013b.
Prandi, P., Valladeau, G., and Ablain, M.: Validation of altimeter data by comparison with tide gauge measurements, Ref. CLS/DOS/NT/15-020, available at: http://www.aviso.altimetry.fr/fileadmin/documents/calval/validation_report/annual_report_insitu_TG_2014.pdf (last access: 7 December 2015), 2015.
Pujol, M.-I. and Larnicol, G.: Mediterranean Sea eddy kinetic energy variability from 11 years of altimetric data, J. Mar. Syst., 58, 121–142, 2005.
Ray, R. D. and Zaron, E. D.: M2 internal tides and their observed wavenumber spectra from satellite altimetry, J. Phys. Oceanogr., 46, 3–22, https://doi.org/10.1175/JPO-D-15-0065.1, 2015.
Rio, M.-H.: Use of altimeter and wind data to detect the anomalous loss of SVP-type drifter's drogue, J. Atmos. Ocean. Technol., 1663–1674, https://doi.org/10.1175/JTECH-D-12-00008.1, 2012.
Rio, M. H., Guinehut, S., and Larnicol, G.: New CNES-CLS09 global mean dynamic topography computed from the combination of GRACE data, altimetry, and in-situ measurements, J. Geophys. Res., 116, C07018, https://doi.org/10.1029/2010JC006505, 2011.
Rudenko, S., Otten, M., Visser, P., Scharroo, R., Schöne, T., and Esselborn, S.: New improved orbit solutions for the ERS-1 and ERS-2 satellites, Adv. Space Res., 49, 1229–1244, 2012.
Schaeffer P., Faugere, Y., Legeais, J. F., Ollivier, A., Guinle, T. and Picot, N.: The CNES CLS11 Global Mean Sea Surface Computed from 16 Years of Satellite Altimeter Data, Mar. Geod., 35, 3–19, https://doi.org/10.1080/01490419.2012.718231, 2012.
Scharroo, R. and Lillibridge, J. L.: Non-parametric sea-state bias models and their relevance to sea level change studies, Proc. of the 2004 Envisat & ERS Symposium, Salzburg, Austria, 6–10 September 2004 (ESA SP-572, edited by: Lacoste, H. and Ouwehand, L., 2005.
Scharroo, R. and Smith, W. H. F.: A global positioning system based climatology for the total electron content in the ionosphere, J. Geophys. Res., 115, A10318, https://doi.org/10.1029/2009JA014719, 2010.
Scharroo, R., Lillibridge, J., Smith, W. H. F., and Schrama, E. J. O.: Cross-calibration and long-term monitoring of the MicrowaveRadiometers of ERS, Topex, GFO, Jason-1 and Envisat, Mar. Geod., 27, 279–297, https://doi.org/10.1080/01490410490465265, 2004.
Taylor, K. E.: Summarizing multiple aspects of model performance in a single diagram, J. Geophys. Res., 106, 7183–7192, https://doi.org/10.1029/2000JD900719, 2001.
Tran, N., Labroue, S., Philipps, S., Bronner, E., and Picot, N.: Overview and Update of the Sea State Bias Corrections for the Jason-2, Jason-1 and TOPEX Missions, Mar. Geod., 33, 348–362, 2010.
Tran N., Philipps, S., Poisson, J.-C., Urien, S., Bronner, E., and Picot, N.: Impact of GDR_D standards on SSB corrections, Presentation OSTST2012 in Venice, http://www.aviso.altimetry.fr/fileadmin/documents/OSTST/2012/oral/02_friday_28/01_instr_processing_I/01_IP1_Tran.pdf (last access: 31 August 2016), 2012.
Valladeau, G., Legeais, J.-F., Ablain, M., Guinehut, S., and Picot, N.: Comparing Altimetry with Tide Gauges and Argo Profiling Floats for Data Quality Assessment and Mean Sea Level Studies, Mar. Geod., OSTM Jason-2 Applications Special Edition – Part 3, 35, 42–60, https://doi.org/10.1080/01490419.2012.718226, 2012
Wahr, J. W.: Deformation of the Earth induced by polar motion, J. Geophys. Res.-Sol. Ea., 90, 9363–9368, 1985.
