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| Durrieu De Madron, Xavier; Ramondenc, S.; Berline, L.; Houpert, L.; Bosse, Anthony; Martini, S.; Guidi, L.; Conan, P.; Curtil, C.; Delsaut, N.; Kunesch, S.; Ghiglione, J. F.; Marsaleix, P.; Pujo-pay, M.; Severin, T.; Testor, P.; Tamburini, C.. |
| The Gulf of Lions in the northwestern Mediterranean is one of the few sites around the world ocean exhibiting deep open-ocean convection. Based on 6-year long (2009-2015) time series from a mooring in the convection region, shipborne measurements from repeated cruises, from 2012 to 2015, and glider measurements, we report evidence of bottom thick nepheloid layer formation, which is coincident with deep sediment resuspension induced by bottom-reaching convection events. This bottom nepheloid layer, which presents a maximum thickness of around 2000 m in the center of the convection region, probably results from the action of cyclonic eddies that are formed during the convection period and can persist within their core while they travel through the basin. The... |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00368/47968/47992.pdf |
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| Rousselet, L.; Doglioli, A.m.; De Verneil, A.; Pietri, A.; Della Penna, A.; Berline, L.; Marrec, P.; Grégori, G.; Thyssen, M.; Carlotti, F.; Barillon, S.; Simon‐bot, F.; Bonal, M.; D'Ovidio, F.; Petrenko, A.. |
| Vertical velocities can be estimated indirectly from in situ observations by theoretical frameworks like the ω‐equation. Direct measures of vertical exchanges are challenging due to their typically ephemeral spatiotemporal scales. In this study we address this problem with an adaptive sampling strategy coupling various biophysical instruments. We analyze the 3‐D organization of a cyclonic mesoscale structure finely sampled during the OSCAHR (Observing Submesoscale Coupling At High Resolution) cruise in the Ligurian Sea during fall 2015. The observations, acquired with a Moving Vessel Profiler (MVP), highlight a subsurface low‐salinity layer (≃ 50 m), as well as rising isopycnals, generated by geostrophic cyclonic circulation, in the structure's center.... |
| Tipo: Text |
Palavras-chave: High-resolution reconstructions of 3-D fields; Vertical velocities estimated with omega-equation; Particle distribution as a tracer for vertical advection. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00490/60214/63567.pdf |
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