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 : ronim@shom.fr
version 2.2 du 1er septembre 2014
REFMAR