LOCEAN: P. Bouruet Aubertot, Y. Cuypers, A. Loureno, D. Dausse, M. - PowerPoint PPT Presentation

LOCEAN: P. Bouruet ‐ Aubertot, Y. Cuypers, A. Lourenço, D. Dausse, M. Beauverger, Gurvan Madec, Sébastien Masson, F. Pinsard LSEET: P. Fraunié, A. Molcard, Y. Ourmières, J. Gaggelli LMD: V. Zeitlin, B. Ribstein LEGI: L. Gostiaux Collaborations: T. Gerkema, H. van Haren (NIOZ), Victor Shrira (UK), K. Winters (Scripps) ⇒ Financements demandés: LEFE ‐ IDAO, GMMC; en cours ANR

General presentation � Inertia ‐ gravity waves generated by the wind, near ‐ inertia: ‐ mécanism & energy fluxes at the base of the mixed ‐ layer ‐ deep propagation and cascade toward small ‐ scales � Interactions with coastal waves ‐ lateral transport effect ‐ theorical study : résonance excitation with inertia ‐ gravity waves (near inertial) � Turbulence ‐ different routes from atmosphéric forcing to turbulence inside océan : direct via inertia_gravity waves and indirect via coastal waves ‐ find mécanisms leading to turbulence, and a beter paramétrization

Approches : theory and ideal models , realistic models, and in ‐ situ measurements Antarès, an ideal site for observation : atmospheric forcing is the main energy sources ‐ north current perturbation induce coastal waves ‐ will be covered by an HF radar VERA system (LSEET, ‐ high resolution, 3km, 1h)

Développment : Micropro autonomous profiler, PROVOR, equipped with microstructure sensors and one microdoppler ‐ profile 0 ‐ 1000m, >4 profiles/day, > 40 days autonomy ‐

Mooring: Darkwave Scheme of the mooring “Darkwave” (to be deployed near D. Lefèvre mooring “Darkvador”) : -long-term mooring measurements (2 years) -100m vertical resolution and relatively high frequency (0.3Hz ) The mooring is equipped with: -temperature sensors every 100m from 500m depth to bottom, -conductivity sensors every 400m, -Doppler current meters every 400m; in addition an -ADCP 75kHz looking upward at 500m depth -ADCP 1200kHz looking downward at 500m depth -ADCP 150kHz looking upward, 150m above bottom -two thermistor strings will be in the range of the ADCP at 500m and 2300m depth.

Measures and sea opérations : ‐ 7 days RV Antedon and 59 days RV Tethys ‐ every 3 months : MICROPRO measures and CTD/LADCP on the mooring point ‐ every 6 months : mooring maintenance