FN Archimer Export Format
PT J
TI Analysis and Interpretation of Frequency–Wavenumber Spectra of Young Wind Waves
BT 
AF LECKLER, Fabien
   ARDHUIN, Fabrice
   PEUREUX, Charles
   BENETAZZO, Alvise
   BERGAMASCO, Filippo
   DULOV, Vladimir
AS 1:1;2:2,3;3:2,3;4:4;5:5;6:6;
FF 1:PDG-ODE-LOS;2:;3:PDG-ODE-LPO;4:;5:;6:;
C1 Serv Hydrog & Oceanog Marine, Brest, France.
   IFREMER, Ctr Brest, Lab Oceanog Spatiale, Plouzane, France.
   UMR 6523 CNRS IFREMER IRD UBO, Lab Phys Oceans, Plouzane, France.
   Natl Res Council CNR ISMAR, Inst Marine Sci, Venice, Italy.
   Univ Ca Foscari Venezia, Venice, Italy.
   Inst Marine Hydrophys, Sebastopol, Russia.
C2 SHOM, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
   IAMC CNR, ITALY
   UNIV CA FOSCARI VENEZIA, ITALY
   INST MARINE HYDROPHYS, RUSSIA
SI BREST
SE PDG-ODE-LOS
   PDG-ODE-LPO
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-int-hors-europe
IF 3.026
TC 57
UR https://archimer.ifremer.fr/doc/00284/39524/38017.pdf
LA English
DT Article
DE ;Circulation;Dynamics;Waves;oceanic;Observational techniques and algorithms;Remote sensing
AB The energy level and its directional distribution are key observations for understanding the energy balance in the wind-wave spectrum between wind-wave generation, nonlinear interactions, and dissipation. Here, properties of gravity waves are investigated from a fixed platform in the Black Sea, equipped with a stereo video system that resolves waves with frequency f up to 1.4 Hz and wavelengths from 0.6 to 11 m. One representative record is analyzed, corresponding to young wind waves with a peak frequency fp = 0.33 Hz and a wind speed of 13 m s−1. These measurements allow for a separation of the linear waves from the bound second-order harmonics. These harmonics are negligible for frequencies f up to 3 times fp but account for most of the energy at higher frequencies. The full spectrum is well described by a combination of linear components and the second-order spectrum. In the range 2fp to 4fp, the full frequency spectrum decays like f−5, which means a steeper decay of the linear spectrum. The directional spectrum exhibits a very pronounced bimodal distribution, with two peaks on either side of the wind direction, separated by 150° at 4fp. This large separation is associated with a significant amount of energy traveling in opposite directions and thus sources of underwater acoustic and seismic noise. The magnitude of these sources can be quantified by the overlap integral I(f), which is found to increase sharply from less than 0.01 at f = 2fp to 0.11 at f = 4fp and possibly up to 0.2 at f = 5fp, close to the 0.5π value proposed in previous studies.
PY 2015
PD OCT
SO Journal Of Physical Oceanography
SN 0022-3670
PU Amer Meteorological Soc
VL 45
IS 10
UT 000362415900003
BP 2484
EP 2496
DI 10.1175/JPO-D-14-0237.1
ID 39524
ER

EF