FN Archimer Export Format
PT J
TI Contrasted turbulence intensities in the Indonesian Throughflow: a challenge for parameterizing energy dissipation rate
BT 
AF BOURUET-AUBERTOT, Pascale
   CUYPERS, Yannis
   FERRON, Bruno
   DAUSSE, Denis
   MENAGE, Olivier
   ATMADIPOERA, Agus
   JAYA, Indra
AS 1:1;2:1;3:4;4:1;5:2;6:3;7:3;
FF 1:;2:;3:;4:;5:PDG-ODE-LOPS-TOIS;6:;7:;
C1 UPMC Univ Paris 06, Sorbonne Univ, LOCEAN, Paris 06, France.
   LOPS Ifremer, Plouzane, France.
   IPB, Bogor, Indonesia.
C2 UNIV PARIS 06, FRANCE
   IFREMER, FRANCE
   IPB, INDONESIA
   CNRS, FRANCE
SI BREST
SE PDG-ODE-LOPS-TOIS
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 1.869
TC 10
UR https://archimer.ifremer.fr/doc/00441/55240/56792.pdf
LA English
DT Article
CR MD 180 / INDOMIX
BO Marion Dufresne
DE ;Turbulence;Internal tides;Vertical mixing;Parameterization;Indonesian seas;Microstructure measurements
AB Microstructure measurements were performed along two sections through the Halmahera Sea and the Ombai Strait and at a station in the deep Banda Sea. Contrasting dissipation rates (𝜖) and vertical eddy diffusivities (K z ) were obtained with depth-averaged ranges of ∼[9×10−10−10−5] W kg− 1 and of ∼[1×10−5−2×10−3] m2 s− 1, respectively. Similarly, turbulence intensity, I=ϵ/(νN2) with ν the kinematic viscosity and N the buoyancy frequency, was found to vary seven orders of magnitude with values up to 107. These large ranges of variations were correlated with the internal tide energy level, which highlights the contrast between regions close and far from internal tide generations. Finescale parameterizations of 𝜖 induced by the breaking of weakly nonlinear internal waves were only relevant in regions located far from any generation area (“far field”), at the deep Banda Sea station. Closer to generation areas, at the “intermediate field” station of the Halmahera Sea, a modified formulation of MacKinnon and Gregg (2005) was validated for moderately turbulent regimes with 100 < I < 1000. Near generation areas marked by strong turbulent regimes such as “near field” stations within strait and passages, 𝜖 is most adequately inferred from horizontal velocities provided that part of the inertial subrange is resolved, according to Kolmogorov scaling. 
PY 2018
PD JUN
SO Ocean Dynamics
SN 1616-7341
PU Springer Heidelberg
VL 68
IS 7
UT 000435673500002
BP 779
EP 800
DI 10.1007/s10236-018-1159-3
ID 55240
ER

EF