FN Archimer Export Format
PT J
TI Characterization of Internal Tide Incoherence: Eulerian versus Lagrangian Perspectives
BT 
AF Caspar-Cohen, Zoe
   Ponte, Aurelien
   Lahaye, Noe
   Carton, Xavier
   Yu, Xiaolong
   LE GENTIL, Sylvie
AS 1:1;2:1;3:2;4:4;5:3;6:1;
FF 1:PDG-ODE-LOPS-OH;2:PDG-ODE-LOPS-OH;3:;4:;5:;6:PDG-ODE-LOPS-OH;
C1 Ifremer, Université de Brest, CNRS, IRD, Laboratoire d’Océanographie Physique et Spatiale, IUEM, Brest, France
   Inria, IRMAR, Campus de Beaulieu, Rennes, France
   School of Marine Sciences, Sun Yat-sen University, Zhuhai, China
   Ifremer, Université de Brest, CNRS, IRD, Laboratoire d’Océanographie Physique et Spatiale, IUEM, Brest, France
C2 IFREMER, FRANCE
   INRIA, FRANCE
   UNIV YAT-SEN, CHINA
   UBO, FRANCE
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 3.5
TC 3
UR https://archimer.ifremer.fr/doc/00786/89755/95280.pdf
LA English
DT Article
DE ;Internal waves;Tides;Surface observations;Idealized models
AB The Lagrangian and Eulerian surface current signatures of a low-mode internal tide propagating through a turbulent balanced flow are compared in idealized numerical simulations. Lagrangian and Eulerian total (i.e., coherent plus incoherent) tidal amplitudes are found to be similar. Compared to Eulerian diagnostics, the Lagrangian tidal signal is more incoherent with comparable or smaller incoherence time scales and larger incoherent amplitudes. The larger level of incoherence in Lagrangian data is proposed to result from the deformation of an Eulerian internal tide signal induced by drifter displacements. Based on the latter hypothesis, a theoretical model successfully predicts Lagrangian autocovariances by relating Lagrangian and Eulerian autocovariances and the properties of the internal tides and jet. These results have implications for the separation of balanced flow and internal tides signals in the sea level data collected by the future Surface Water and Ocean Topography (SWOT) satellite mission. 
PY 2022
PD JUL
SO Journal Of Physical Oceanography
SN 0022-3670
PU American Meteorological Society
VL 52
IS 6
UT 000839063900012
BP 1245
EP 1259
DI 10.1175/JPO-D-21-0088.1
ID 89755
ER

EF