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| Dushaw, Brian; Gaillard, Fabienne; Terre, Thierry. |
| An acoustic propagation experiment over 308-km range conducted in the Canary Basin in 1997–1998 was used to assess the ability of ocean acoustic tomography to measure the flux of Mediterranean water and Meddies. Instruments on a mooring adjacent to the acoustic path measured the southwestward passage of a strong Meddy in temperature, salinity, and current. Over nine months of transmissions, the acoustic arrival pattern was an initial broad stochastic pulse varying in duration by 250 to 500 ms, followed eight stable, identified ray arrivals. Small-scale sound speed fluctuations from Mediterranean water parcels littered around the sound channel axis caused acoustic scattering. Internal waves contributed more modest acoustic scattering. Based on simulations,... |
| Tipo: Text |
Palavras-chave: Meddy; Acoustic tomography; Canary Basin; Mediterranean water; Internal tides. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00404/51519/52112.pdf |
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| Sellschopp, J; Onken, R. |
| Two lenses of cold water with core temperature 12.5 degrees C were observed in the central Ionian Sea between the thermocline and the salinity maximum due to Levantine Intermediate Water. The estimated salinity in the lenses is 37.8. The relevance of the observation is assured by the high number of expendable probes deployed. The lens diameters are estimated at 30 km. Analogy with a less spectacular feature contained in oceanographic measurements in the following year implies that the lenses rotate clockwise. The cold water lenses originate from the Adriatic Sea with a generation mechanism equivalent to meddy formation at the Iberian peninsula (eddy of Mediterranean water in the Atlantic Ocean). Year to year differences in cold lens generation are expected... |
| Tipo: Text |
Palavras-chave: Masse d'eau; Lentille; Meddy; Ionienne; Adriatique; Water mass; Lens; Meddy; Ionian; Adriatic. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00324/43568/44049.pdf |
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| Carton, Xavier; Le Cann, Bernard; Serpette, Alain; Dubert, Jesus. |
| In 1990, satellite observations revealed that an anticyclonic surface eddy (a SWODDY, for Slope Water Oceanic eDDY) followed a cycloidal trajectory north of the Iberian coast in the Bay of Biscay. To understand the mechanisms underlying such a trajectory, we study the evolution of an idealized surface eddy in a two-layer flat-bottom quasi-geostrophic model. The effect of several processes is studied, notably the presence of deep anticyclonic vorticity. This deep vorticity may result either from the tilting of the swoddy itself, or from the presence of an anticyclonic eddy of different origins, such as a meddy (Mediterranean Water EDDY). We also study the influence of a zonal coast south of the swoddy, via the "mirror effect". Firstly, a point-vortex model... |
| Tipo: Text |
Palavras-chave: Bay of Biscay; Anticyclonic eddies; Swoddy; Meddy; Point vortex dynamics; Trajectory; Quasi-geostrophic model; In-situ observations. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00125/23589/21478.pdf |
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