FN Archimer Export Format PT J TI Variability of the turbulent kinetic energy dissipation along the A25 Greenland-Portugal transect repeated from 2002 to 2012. BT AF FERRON, Bruno KOKOSZKA, Florian MERCIER, Herle LHERMINIER, Pascale HUCK, Thierry RIOS, Aida THIERRY, Virginie AS 1:1;2:2;3:1;4:3;5:1;6:4;7:1,3; FF 1:;2:;3:;4:PDG-ODE-LOPS-OH;5:;6:;7:PDG-ODE-LOPS-OH; C1 IFREMER, CNRS, IRD, UBO,Lab Phys Oceans,Ctr Brest,UMR 6523, CS 10070, F-29280 Plouzane, France. IFREMER, CNRS, IRD, UBO,Lab Phys Oceans,UMR 6523, Brest, France. CSIC, Inst Invest Marinas Vigo, Vigo, Spain. C2 CNRS, FRANCE UBO, FRANCE IFREMER, FRANCE CSIC, SPAIN SI BREST SE PDG-ODE-LOPS-OH UM LOPS IN WOS Ifremer jusqu'en 2018 copubli-france copubli-europe copubli-univ-france IF 3.13 TC 7 UR https://archimer.ifremer.fr/doc/00333/44463/44141.pdf LA English DT Article CR OVIDE 1 OVIDE 2 OVIDE 3 OVIDE 4 OVIDE 5 BO Thalassa Maria S. Merian AB The variability of the turbulent kinetic energy dissipation due to internal waves is quantified using a finescale parameterisation applied to the A25 Greenland-Portugal transect repeated every two years from 2002 to 2012. The internal wave velocity shear and strain are estimated for each cruise at 91 stations from full depth vertical profiles of density and velocity. The 2002–2012 averaged dissipation rate, <ε2002–2012>, in the upper ocean lies in the range 1–10 × 10-10 W kg-1. At depth, <ε2002–2012> is smaller than 1 × 10-10 W kg-1 except over rough topography found at the continental slopes, the Reykjanes Ridge and in a region delimited by the Azores-Biscay Rise and Eriador Seamount. There, the vertical energy flux of internal waves is preferentially oriented toward the surface and <ε2002–2012> is in the range 1–20 × 10-10 W kg-1. The interannual variability in the dissipation rates is remarkably small over the whole transect. A few strong dissipation rate events exceeding the uncertainty of the finescale parameterisation occur at depth between the Azores-Biscay Rise and Eriador Seamount. This region is also marked by mesoscale eddying flows resulting in enhanced surface energy level and enhanced bottom velocities. Estimates of the vertical energy fluxes into the internal tide and into topographic internal waves suggest that the latter are responsible for the strong dissipation events. At Eriador Seamount, both topographic internal waves and internal tide contribute with the same order of magnitude to the dissipation rate while around the Reykjanes Ridge the internal tide provides the bulk of the dissipation rate. PY 2016 PD JUN SO Journal Of Physical Oceanography SN 0022-3670 PU Amer Meteorological Soc VL 46 IS 7 UT 000409165800001 BP 1989 EP 2003 DI 10.1175/JPO-D-15-0186.1 ID 44463 ER EF