Tide gauging technology at "Tonnerres de Brest 2012"

Logo Les tonnerres de Brest 2012

Tonnerres de Brest 2012, the major international maritime festival begins on 13 July 2012. In addition to the gathering of old sailing vessels, exhibitions and a range of other activities are available for you to discover, such as the village of sciences and technologies of the sea. Amongst the themes developed is the question "Is the sea level changing?" SHOM, partner of "Tonnerres de Brest" and the village of the sea, in collaboration with the Commissariat à l'énergie atomique et aux énergies alternatives (CEA) (the French atomic energy and alternative energy commission), Météo-France and the Institut Universitaire Européen de la Mer (IUEM), is presenting the tide gauging stand: "The sea level: observe, predict and understand. A world reference, a unique observatory: Brest, on the leading edge of tide gauging technology for the last 300 years".






Equipment presented on the tide gauging stand

Several items of equipment are exhibited on the tide gauging stand. They include:

  • the tide staff, the original instrument for measuring the sea level and still essential for checking tide gauge observatories;
  • a mechanical tide gauge, an OTT 20 030, which operated in the Brest observatory from 1977 to 1992;
  • a Khröne optiwave digital tide gauge, currently used and deployed beneath a derrick;
  • the future tide gauge, the prototype GPS buoy developed by SHOM (finance by GRGS)..


Vue du stand marégraphie centré sur le marégraphe mécanique. En arrière plan, la courbe d'évolution du niveau de la mer depuis 300 ans mesurée à Brest.


Vue sur le stand marégraphie avec l'échelle de marée et le marégraphe mécanique



In addition to the panel explaining the ins and outs of the increase in ocean levels, the focus is placed on several applications of tide gauges:

  • The change in the sea level at Brest in the last 300 years;
  • The tsunami alert centre for the Western Mediterranean and North-East Atlantic (CENALT);
  • The storm surge flood warning system (French designation VVS).

marégraphe numérique déployé sur potence et évolution du niveau de la mer à Brest depuis 300 ans en arrière-plan


Ecran diffusant les vigilances météorologiques et ordinateur diffusant le portail REFMAR


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