FN Archimer Export Format
PT J
TI Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry
BT 
AF MARALDI, Claire
   LYARD, Florent
   TESTUT, Laurent
   COLEMAN, Richard
AS 1:1;2:1;3:1;4:2,3;
FF 1:;2:;3:;4:;
C1 CNRS, Lab Etudes Geophys & Oceanog Spatiales, F-31400 Toulouse, France.
   Antarctic Climate & Ecosyst CRC, Hobart, Tas 7001, Australia.
   Univ Tasmania, Inst Marine & Antarctic Studies, Hobart, Tas, Australia.
C2 CNRS, FRANCE
   ACE CRC, AUSTRALIA
   UNIV TASMANIA, AUSTRALIA
SI TOULOUSE
SE SHOM-CFUD
IF 3.021
TC 12
UR https://archimer.ifremer.fr/doc/00144/25564/23709.pdf
LA English
DT Article
CR VT 113 / NIVMER11
BO Marion Dufresne
DE ;internal tides;Kerguelen Plateau;altimetry;barotropic tides
AB A barotropic tidal model, with a parameterization term to account for the internal wave drag energy dissipation, is used to examine areas of possible M(2) internal tide generation in the Kerguelen Plateau region. Barotropic energy flux and a distribution of wave drag dissipation are computed. The results suggest important conversion of barotropic energy into baroclinic tide generation over the northern Kerguelen Plateau shelf break, consistent with a theoretical criterion based on ocean stratification, tidal forcing frequency, and bathymetric gradients. The sea surface height signatures of time-coherent internal tides are studied using TOPEX/Poseidon and Jason-1 altimeter data, whose ascending tracks cross nearly perpendicular to the eastern and western Kerguelen Plateau shelf break. Oscillations of a few centimeters associated with phase-locked internal tides propagate away from the plateau over distances of several hundred kilometers with a similar to 110 km wavelength. When reaching the frontal area of the Antarctic Circumpolar Current, the internal tide cannot be identified because of the aliasing of mesoscale variability into the same alias band as M(2). Finally, using altimeter data, we estimate the M(2) barotropic tidal power converted through the internal tide generation process. We find consistent values with the barotropic model parameterization estimation, which is also in good agreement with global internal tide model estimates. Combined with modeling, this study has shown that altimetry can be used to estimate internal tide dissipation.
PY 2011
PD JUL
SO Journal Of Geophysical Research-oceans
SN 0148-0227
PU Amer Geophysical Union
VL 116
IS C06004
UT 000291824100001
BP 1
EP 10
DI 10.1029/2010JC006515
ID 25564
ER

EF