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Vous êtes ici : Accueil / Actualités / Séminaires / Seminaires Septembre 2017-Aout 2018 / Jeudi 5 Juillet - SMART Subsea Cables for Observing the Global Ocean: Science and Implementation Plan

Jeudi 5 Juillet - SMART Subsea Cables for Observing the Global Ocean: Science and Implementation Plan

Par SEMSOU Dernière modification 21/06/2018 14:32
Quand ? Le 05/07/2018,
de 14:00 à 15:00
Où ? salle Jules Verne
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Jérôme Aucan

 LEGOS/IRD, Nouméa, NEW CALEDONIA

 

Title: SMART Subsea Cables for Observing the Global Ocean: Science and Implementation Plan

 

Abstract: The deep ocean is key to understanding environmental and societal threats, from climate and ocean warming to rising sea level, ocean acidification, and tsunamis. The deep ocean, however, is difficult and costly to monitor, and we lack fundamental data needed to adequately model, understand, and address these threats. One solution is to integrate sensors into future undersea telecommunications cable systems. This is the mission of the SMART cables initiative (Science Monitoring And Reliable Telecommunications), a Joint Task Force (JTF) sponsored by three UN agencies. SMART sensors would “piggyback” on the power and communications infrastructure of more than a million kilometers of undersea fiber optic cable and tens of thousands of repeaters, creating the potential for global coverage at modest incremental cost. Initial sensors would measure temperature, pressure, and acceleration. The resulting data would address two critical scientific and societal issues: a) the long-term need for sustained climate-quality data from the under-sampled deep oceans, and b) the near term need for improvements to global tsunami warning networks. This presentation explores the ocean observing improvements available from SMART cables. Simulations show deep ocean temperature and pressure measurements can improve estimates of ocean circulation and heat content, and cable-based pressure and acceleration sensors can improve tsunami warning times and earthquake parameters. The technology of integrating sensors into fiber optic cables are discussed, addressing sea and land-based elements plus delivery of real-time open data products to stakeholders. SMART cables have been endorsed by major ocean science organizations. JTF is working with cable suppliers and sponsors, development banks and end-users to incorporate SMART capabilities into future cable projects. By providing a global ocean network of long-lived sensors, SMART cables would be a first-order addition to the global ocean observing system.

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