FN Archimer Export Format
PT J
TI Estimation of the Eddy Viscosity Profile in the Sea Surface Boundary Layer from Underway ADCP Observations
BT 
AF Sentchev, Alexei
   Yaremchuk, Max
   Bourras, Denis
   Pairaud, Ivane
   Fraunié, Philippe
AS 1:1;2:2;3:3;4:4;5:3;
FF 1:;2:;3:;4:PDG-ODE-LOPS-OC;5:;
C1 Laboratory of Oceanology and Geosciences, UMR8187, Univ. Littoral Côte d’Opale, CNRS, Univ. Lille, IRD, Wimereux, France
   Naval Research Laboratory, Stennis Space Center, Mississippi
   Mediterranean Institute of Oceanography, Aix-Marseille University, University of Toulon, CNRS, IRD, Marseille, France
   LOPS, IFREMER, CNRS, UBO, IRD, Plouzané, France
C2 UNIV LITTORAL COTE D'OPALE, FRANCE
   NAVAL RES LAB, USA
   UNIV AIX MARSEILLE, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOPS-OC
UM LOPS
IN WOS Ifremer UMR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 2.2
TC 0
UR https://archimer.ifremer.fr/doc/00857/96908/105539.pdf
LA English
DT Article
CR UPCAST
BO Téthys II
DE ;Turbulence;Mixing;In situ oceanic observations;Oceanic profilers
AB A method of assessing the mean eddy viscosity profile (EVP) in the sea surface boundary layer (SBL) under variable wind conditions is proposed. Performance of the method is tested using observations by an ADCP-equipped platform in the coastal environment of the northwestern Mediterranean Sea under variable (3–12 m s−1) wind conditions. EVP retrievals are made by a variational method strongly constrained by the Ekman dynamics, with the wind and velocity observations assumed to be uncertain within the prescribed error bars. Results demonstrate a reasonable agreement of the EVPs with KPP shape functions for stronger (8–12 m s−1) wind conditions and appear to be consistent with the classical Pacanowski–Philander parameterization of the viscosity profile based on the Richardson number. For weaker (3–5 m s−1) winds, the EVP retrievals turn out to be less accurate, which is primarily attributed to the decay of the wind-driven turbulence energy in the SBL. Feasibility and prospects of the retrieval technique are discussed in the context of uncertainties in the structure of the background flow and limitations of the microstructure and ADCP profiling. 
PY 2023
PD OCT
SO Journal Of Atmospheric And Oceanic Technology
SN 0739-0572
PU American Meteorological Society
VL 40
IS 10
UT 001086643600001
BP 1291
EP 1305
DI 10.1175/JTECH-D-22-0083.1
ID 96908
ER

EF