FN Archimer Export Format
PT J
TI Surface currents in the Alderney Race from high-frequency radar measurements and three-dimensional modelling
BT 
AF Lopez, G.
   Bennis, Anne-Claire
   Barbin, Y.
   Sentchev, A.
   Benoit, L.
   Marié, Louis
AS 1:1;2:1;3:2;4:3;5:1;6:4;
FF 1:;2:;3:;4:;5:;6:PDG-ODE-LOPS-OC;
C1 Morphodynamique Continentale et Côtière (M2C), CNRS UMR 6143, Univ. Caen Normandie, 14000 Caen, France
   Retired from Institut Méditerranéen d’Oceanologie (MIO), CNRS UMR 7294, IRD, Univ. Toulon, Univ. Aix-Marseille, 83041, Toulon, France
   Laboratory of Oceanology and Geosciences, University Littoral Côte d’Opale, Univ. Lille, CNRS UMR 8187 LOG, Wimereux 62930, France
   Laboratoire d’Océanographie Physique et Spatiale (LOPS), CNRS UMR 6523, Univ. Brest, Ifremer, IRD, 29280 Plouzané, France
C2 UNIV CAEN, FRANCE
   CNRS, FRANCE
   UNIV LITTORAL COTE D'OPALE, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOPS-OC
UM LOPS
IN WOS Ifremer UMR
   copubli-france
   copubli-univ-france
IF 1.493
TC 6
UR https://archimer.ifremer.fr/doc/00643/75516/78391.pdf
LA English
DT Article
CR HYD2M
DE ;HF radar;surface current;Alderney Race;MARS 3D;WW3;high-frequency radar
AB Two weeks of high-frequency radar measurements collected at the Alderney Race are compared with the results of a three-dimensional fully coupled wave–current model. Spatial current measurements are rare in this site, otherwise well investigated through modelling. Thus, the radar measurements offer a unique opportunity to examine the spatial reliability of numerical results, and can help to improve our understanding of the complex currents in the area. Comparison of observed and modelled surface current velocities showed a good agreement between the methods, represented by root mean squared errors ranging from 14 to 40 cm s−1 and from 18 to 60 cm s−1 during neap and spring tides, respectively. Maximum errors were found in shallow regions with consistently high current velocities, represented by mean neap and spring magnitudes of 1.25 m s−1 and 2.7 m s−1, respectively. Part of the differences between modelled and observed surface currents in these areas are thought to derive from limitations in the k-epsilon turbulence model used to simulate vertical mixing, when the horizontal turbulent transport is high. In addition, radar radial currents showed increased variance over the same regions, and might also be contributing to the discrepancies found. Correlation analyses yielded magnitudes above 0.95 over the entire study area, with better agreement during spring than during neap tides, probably because of an increase in the phase lag between radar and model velocities during the latter. 
PY 2020
PD AUG
SO Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences
SN 1364-503X
PU The Royal Society
VL 378
IS 2178
UT 000556600000005
DI 10.1098/rsta.2019.0494
ID 75516
ER

EF