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From Satellite Altimetry to Argo and Operational Oceanography: Three Revolutions in Oceanography : Volume 10, Issue 4 (18/07/2013)

By Le Traon, P. Y.

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Book Id: WPLBN0004020704
Format Type: PDF Article :
File Size: Pages 41
Reproduction Date: 2015

Title: From Satellite Altimetry to Argo and Operational Oceanography: Three Revolutions in Oceanography : Volume 10, Issue 4 (18/07/2013)  
Author: Le Traon, P. Y.
Volume: Vol. 10, Issue 4
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Le Traon, P. Y. (2013). From Satellite Altimetry to Argo and Operational Oceanography: Three Revolutions in Oceanography : Volume 10, Issue 4 (18/07/2013). Retrieved from http://worldlibrary.net/


Description
Description: Ifremer and Mercator Ocean, 8–10 rue Hermès – Parc Technologique du Canal, 31520 Ramonville St Agne, France. The launch of the US/French mission Topex/Poseidon (T/P) (CNES/NASA) in August 1992 was the start of a revolution in oceanography. For the first time, a very precise altimeter system optimized for large scale sea level and ocean circulation observations was flying. T/P alone could not observe the mesoscale circulation. In the 1990s, the ESA satellites ERS-1/2 were flying simultaneously with T/P. Together with my CLS colleagues, we demonstrated that we could use T/P as a reference mission for ERS-1/2 and bring the ERS-1/2 data to an accuracy level comparable to T/P. Near real time high resolution global sea level anomaly maps were then derived. These maps have been operationally produced as part of the SSALTO/DUACS system for the last 15 yr. They are now widely used by the oceanographic community and have contributed to a much better understanding and recognition of the role and importance of mesoscale dynamics. Altimetry needs to be complemented with global in situ observations. In the end of the 90s, a major international initiative was launched to develop Argo, the global array of profiling floats. This has been an outstanding success. Argo floats now provide the most important in situ observations to monitor and understand the role of the ocean on the earth climate and for operational oceanography. This is a second revolution in oceanography. The unique capability of satellite altimetry to observe the global ocean in near real time at high resolution and the development of Argo were essential to the development of global operational oceanography, the third revolution in oceanography. The Global Ocean Data Assimilation Experiment (GODAE) was instrumental in the development of the required capabilities. This paper provides an historical perspective on the development of these three revolutions in oceanography which are very much interlinked. This is not an exhaustive review and I will mainly focus on the contributions we made together with many colleagues and friends.

Summary
From satellite altimetry to Argo and operational oceanography: three revolutions in oceanography

Excerpt
Ablain, M., Cazenave, A., Valladeau, G., and Guinehut, S.: A new assessment of the error budget of global mean sea level rate estimated by satellite altimetry over 1993–2008, Ocean Sci., 5, 193–201, doi:10.5194/os-5-193-2009, 2009.; Arbic, B. K., Richman, J. G., Shriver, J. F., Timko, P. G., Metzger, E. J., and Wallcraft, A. J.: Global modeling of internal tides within an eddying ocean general circulation model, Oceanography 25, 20–29, 2012.; Argo Science Team: On the Design and implementation of argo: an initial plan for a global array of profiling floats, International CLIVAR Project Office Report Number 2, GODAE Report No. 5, GODAE International Project Office, Melbourne, Australia, 1998.; Ayoub, N., Le Traon, P. Y., and De Mey, P.: Combining ERS-1 and TOPEX/Poseidon data to observe the variable oceanic circulation in the Mediterranean sea, J. Marine Syst., 18, 3–40, 1998.; Balmaseda, M. and Anderson, D.: Impact of initialization strategies and observations on seasonal forecast skill, Geophys. Res. Lett., 36, L01701, doi:10.1029/2008GL035561, 2009.; Balmaseda, M., Anderson, D., and Vidard, A.: Impact of Argo on analyses of the global ocean, Geophys. Res. Lett., 34, L16605, doi:10.1029/2007GL030452, 2007.; Bell, M. J., Lefebvre, M., Le Traon, P. Y., Smith, N., and Wilmer-Becker, K.: The global ocean data assimilation experiment, Oceanography, 22, 14–21, 2009.; Brachet, S., Le Traon, P. Y., and Le Provost, C.: Mesoscale variability from a high-resolution model and from altimeter data in the North Atlantic Ocean, J. Geophys. Res., 109, C12025, doi:10.1029/2004JC002360, 2004.; Bretherton, F. P., Davis, R. E., and Fandry, C. B.: A technique for objective analysis and design of oceanographic experiment applied to MODE-73, Deep-Sea Res., 23, 559–582, 1976.; Cazenave, A. and Nerem, R. S.: Present-day sea level change: observations and causes, Rev. Geophys., 42, RG3001, doi:10.1029/2003RG000139, 2004.; Cazenave, A., Dominh, K., Guinehut, S., Berthier, E., Llovel, W., Ramillien, G., Ablain, M., and Larnicol, G.: Sea level budget over 2003–2008: a reevaluation from GRACE space gravimetry, satellite altimetry and Argo, Global Planet. Change, 65, 83–88, 2009.; Chelton, M. G. and Schlax, D. B.: The resolution capability of an irregularly sampled dataset: with application to Geosat altimeter data, J. Atmos. Ocean. Tech., 11, 534–550, 1994.; Chelton, D. B., Ries, J. C., Haines, B. J., Fu, L. L., and Callahan, P. S.: Satellite Altimetry, in: Satellite Altimetry and Earth Sciences, edited by: Fu, L. L. and Cazenave, A., Academic Press, 2001.; Chelton, D. B., Schlax, M. G., Samelson, R. M., and de Szoeke, R. A.: Global observations of large oceanic eddies, Geophys. Res. Lett., 34, L15606, doi:10.1029/2007GL030812, 2007.; Chelton, D. B., Schlax, M. G., and Samelson, R. M.: Global observations of nonlinear mesoscale eddies, Prog. Oceanogr., 91, 167–216, 2011b.; Chelton, D. B., Gaube, P., Schlax, M. G., Early, J. J., and Samelson, R. M.: The influence of nonlinear mesoscale eddies on near-surface chlorophyll, Science, 334, 328–332, 2011a.; Dhomps, A. -L., Guinehut, S., Le Traon, P.-Y., and Larnicol, G.: A global comparison of Argo and satellite altimetry observations, Ocean Sci., 7, 175–183, doi:10.5194/os-7-175-2011, 2011.; Dibarboure, G., Pujol, I. M., Briol, F., Le Traon, P.-Y., Larnicol, G., Picot, N., Mertz, F., and Ablain, M.: Jason-2 in DUACS: updated system description, first tandem results and impact on processing and products, Mar. Geod., 34, 214–241 2011.; Dombrowsky, E., Bertino, L., Brassington, G

 

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