1AS$+$ EOLEN, 5 avenue Didier Daurat, 31400 Toulouse, France
2CLS-DOS, 8-10 rue Hermès – Parc Technologique du canal, 31250 Ramonville Saint Agne, France
Received: 01 Mar 2012 – Discussion started: 24 May 2012
Abstract. The European MyOcean project (http://www.myocean.eu.org) provides observations of the ocean dynamic topography from altimeter measurements. Three specific indicators have been developed, based on altimeter data only, in order to monitor the ocean state. The first ocean indicator observes the positive and negative phases of the ENSO events in the tropical Pacific, the El Niño/La Niña events, since 1992. The second ocean indicator tracks the contracted or extended state of the Kuroshio Extension. The last ocean indicator is dedicated to the Ionian Basin in the Mediterranean Sea and permits separation of "zonal-cyclonic" state (1998–2005 and since 2011 up to now) from the "anticyclonic" state (1993–1996) usually discussed in the literature. In addition, it allows identifying a third state in which both the anticyclonic circulation around the northern part of the basin and the strong zonal Mid-Ionian Jet co-exist (2008–2010).
Revised: 17 Apr 2013 – Accepted: 26 Apr 2013 – Published: 12 Jun 2013
Bessières, L., Rio, M. H., Dufau, C., Boone, C., and Pujol, M. I.: Ocean state indicators from MyOcean altimeter products, Ocean Sci., 9, 545-560, doi:10.5194/os-9-545-2013, 2013.