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

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Apr 20, 2023 14 likes •75 views

LOCEAN: P. Bouruet Aubertot, Y. Cuypers, A. Loureno, D. Dausse, M. Beauverger, Gurvan Madec, Sbastien Masson, F. Pinsard LSEET: P. Frauni, A. Molcard, Y. Ourmires, J. Gaggelli LMD: V. Zeitlin, B. Ribstein LEGI: L. Gostiaux

SLIDE 1

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

SLIDE 2

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

SLIDE 3

Approches : theory and ideal models , realistic

models, and in‐situ measurements

Antarès, an ideal site for observation :

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atmospheric forcing is the main energy sources

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north current perturbation induce coastal waves

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will be covered by an HF radar VERA system (LSEET, high resolution, 3km, 1h)

SLIDE 4

Développment : Micropro

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autonomous profiler, PROVOR, equipped with microstructure sensors and one microdoppler

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profile 0‐1000m, >4 profiles/day, > 40 days autonomy

SLIDE 5

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.

SLIDE 6

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