FN Archimer Export Format
PT J
TI Breaking of Internal Waves and Turbulent Dissipation in an Anticyclonic Mode Water Eddy
BT 
AF Fernández-Castro, Bieito
   Evans, Dafydd Gwyn
   Frajka-Williams, Eleanor
   Vic, Clement
   Naveira-Garabato, Alberto C.
AS 1:1;2:2;3:2;4:3;5:4;
FF 1:;2:;3:;4:;5:;
C1 Departamento de Oceanografía, Instituto de Investigacións Mariñas (IIM-CSIC), Vigo, Spain
   National Oceanography Centre, Southampton, UK
   Laboratoire d’Océanographie Physique et Spatiale, UBO-CNRS-IFREMER-IRD, IUEM, Plouzané, France
   Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton, UK
C2 IIM CSIC, SPAIN
   NOC, UK
   UBO, FRANCE
   NOC, UK
UM LOPS
IN WOS Cotutelle UMR
   copubli-europe
IF 3.373
TC 20
UR https://archimer.ifremer.fr/doc/00615/72734/71841.pdf
   https://archimer.ifremer.fr/doc/00615/72734/88217.pdf
LA English
DT Article
AB A four-month glider mission was analyzed to assess turbulent dissipation in an anticyclonic eddy at the western boundary of the subtropical North Atlantic. The eddy (radius ≈ 60 km) had a core of low potential vorticity between 100–450 m, with maximum radial velocities of 0.5 m s−1 and Rossby number ≈ −0.1. Turbulent dissipation was inferred from vertical water velocities derived from the glider flight model. Dissipation was suppressed in the eddy core (ε ≈ 5×10−10 W kg−1) and enhanced below it (> 10−9 W kg−1). Elevated dissipation was coincident with quasi-periodic structures in the vertical velocity and pressure perturbations, suggesting internal waves as the drivers of dissipation. A heuristic ray-tracing approximation was used to investigate the wave-eddy interactions leading to turbulent dissipation. Ray-tracing simulations were consistent with two types of wave-eddy interactions that may induce dissipation: the trapping of near-inertial wave energy by the eddy’s relative vorticity, or the entry of an internal tide (generated at the nearby continental slope) to a critical layer in the eddy shear. The latter scenario suggests that the intense mesoscale field characterizing the western boundaries of ocean basins might act as a ‘leaky wall’ controlling the propagation of internal tides into the basins’ interior. 
PY 2020
PD JUN
SO Journal Of Physical Oceanography
SN 0022-3670
PU American Meteorological Society
VL 50
IS 7
UT 000617314700005
BP 1893
EP 1914
DI 10.1175/JPO-D-19-0168.1
ID 72734
ER

EF