infoclimat
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infoclimat
SHOM tide gauge network (RONIM) In few words… The RONIM project aims at establishing and operating a modern network of tide gauges, continuously measuring sea level in the main ports of metropolitan France and French overseas territories. The project also ensures that these data are available to every user in real time (raw data) or in time delayed mode (validated data). A national network for sea level observation Guadeloupe Dunkerque Calais Boulogne-sur-Mer Cherbourg Dieppe Le Havre Pointe-à-Pitre Roscoff Saint-Malo Brest Le Conquet Concarneau Le Crouesty Port-Tudy Saint-Nazaire Herbaudière Les Sables-d’Olonne La Rochelle-Pallice •P erformance : All stations are currently equipped with radar sensors and real time transmissions; Fort-de-France Ile d’Aix Pointe de Grave Guyane Arcachon Monaco Nice Sète Fos-sur-Mer ° La Figueirette Marseille Port Ferréol Port La Nouvelle Toulon Centuri Ile Rousse Port Vendres Martinique Îles du Salut Boucau-Bayonne Saint-Jean-de-Luz Ajaccio Solenzara Île Miquelon Pointe des Galets La Réunion Mayotte Dzaoudzi Sainte-Marie Toamasina Port de Saint-Pierre Île Saint-Pierre •P artnerships and installations : 45 stations are installed in major ports of metropolitan France and French overseas territories. It represents as many partnerships contracted with local authorities; •A vailability : - The data is available in real time on the webportal REFMAR: http://refmar.shom.fr. - The daily, monthly and yearly mean seal levels series are available on http://www.sonel.org Numbo Nouvelle-Calédonie Madagascar Location of the 45 RONIM tide gauges (01/09/2014) A tide gauge network with various applications Measuring sea level along the coast meets various needs: - Safety for navigation in harbour entrances, - Improvement of tidal predictions and hydrodynamic models, - Processing of bathymetric surveys, - Definition of maritime vertical references (RAM), - Monitoring of the rising mean sea level in support of the French National Plan for Adaptation to the Climate Change (PNACC), - Contribution to the Global Sea Level Observing System GLOSS driven by UNESCO and the Intergovernmental Oceanographic Commission (IOC), - Calibration of satellite altimetry instruments (Jason 1, 2 et 3, Cryosat 2, Sentinel 3,…), - Integrated coastal management (coastline monitoring, habitats,…), - Statistics and historical researches on extreme sea levels and storm surges, - Forecasts in coastal oceanography (Previmer, EuroGOOS), - Support to French national tsunami warning system in the Mediterranean sea and Northeast Atlantic ocean (CENALT) operated by CEA in partnership with SHOM and CNRS, - Contribution to the tsunami warning systems in the Caribbean sea and Indian ocean, - Support to strong waves and storm surge warning system (VVS) operated by Météo-France in partnership with SHOM. History 1992 Launch of RONIM project 1998 First radar tide gauge 2001 Creation of the webportal www.sonel.org 2005 First tide gauge installed overseas, real-time demonstrator with ADSL in Brest 2006 Partnership with the Previmer project www.previmer.org Since 2007 Contribution to the tsunami warning system in the Indian ocean (CNATOI) Reliability et accuracy Measuring sea level is based on the measurement of the elapsed time between the transmission and the reception of an electromagnetic wave emitted by the radar sensor and reflected on the water surface. Radar sensors can be installed on top of a stilling well or simply in the open air. In addition to the high accuracy, the advantages of radar sensors are : • no moving pieces; • a very low time drift error; • limited risk of corrosion; • less human interventions, that can be sources of error. Since 2009 Partnership SHOM-CEA-CNRS for CRATANEM project. Since 2011 Data available in near real time on http://refmar.shom.fr 2011 Launch of VVS system (MétéoFrance/SHOM) The data real-time transmission is ensured via the Internet and sometimes doubled via a special Meteosat9 satellite transmitter for tide gauges that participate to security warning programs (storm and tsunamis). 2012 Periodically, data is viewed, corrected and validated by SHOM network managers in order to make available an as long as possible series of continuous validated sea level observations. Launch of CENALT 2012 - 2018 Launch of HOMONIM project for coastal ocean forecasting. Glossary CNATOI Tsunami warning center in the Indian ocean. crédits : infoclimat.fr VVS to Concarneau the17/1/2012 CRATANEM Project for the creation of a French tsunami warning center in northeast Atlantic ocean and western Mediterranean sea. CENALT French national tsunami warning center. Under SONEL project (www.sonel.org), partnership between SHOM, IGN, LEGOS and LIENSs, the following 10 gauges are co-localized with a permanent GPS station to monitor the stability of the sites in relation to an absolute reference: Saint-Malo, Roscoff, Brest, La Rochelle, L’Ile d’Aix, Saint-Jean-de-Luz, Sete, Marseille, Ajaccio and Fort-de-France. GLOSS Global Sea Level Observing System. HOMONIM RONIM partners Project for observing and modeling sea level at the coast. LEGOS Laboratory for studies in geophysics and spacial oceanography. MARINE NATIONALE PRÉFET DE LA RÉGION RÉUNION PRÉFET DE LA GIRONDE PRÉFET DE LA RÉGION BRETAGNE Mairie de Solenzara Mairie de Centuri LIENSs Littoral environment and societies. National coordination of French tide gauge networks. SONEL Long term sea level observing system. VVS Strong waves & storm surge warning system. Service hydrographique et océanographique de la marine Direction des opérations - projet RONIM Mailing address : SHOM - CS 92803 - 29228 BREST CEDEX 2 - France e-mail : [email protected] version 2.2 du 1er septembre 2014 REFMAR
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