FN Archimer Export Format
PT J
TI Observation of swell dissipation across oceans
BT 
AF ARDHUIN, Fabrice
   CHAPRON, Bertrand
   COLLARD, Fabrice
AS 1:1;2:2;3:3;
FF 1:;2:PDG-DOP-DCB-OPS-LOS;3:;
C1 Serv Hydrog & Oceanog Marine, F-29609 Brest, France.
   IFREMER, Ctr Brest, Lab Oceanog Spatiale, F-29280 Plouzane, France.
   Collecte Localisat Satellites, Div Radar, F-29280 Plouzane, France.
C2 SHOM, FRANCE
   IFREMER, FRANCE
   CLS, FRANCE
SI BREST
SE PDG-DOP-DCB-OPS-LOS
IN WOS Ifremer jusqu'en 2018
   copubli-france
IF 3.204
TC 209
UR https://archimer.ifremer.fr/doc/2009/publication-6452.pdf
LA English
DT Article
AB Global observations of ocean swell, from satellite Synthetic Aperture Radar data, are used to estimate the dissipation of swell energy for a number of storms. Swells can be very persistent with energy e-folding scales exceeding 20,000 km. For increasing swell steepness this scale shrinks systematically, down to 2800 km for the steepest observed swells, revealing a significant loss of swell energy. This value corresponds to a normalized energy decay in time beta = 4.2 x 10(-6) s(-1). Many processes may be responsible for this dissipation. The increase of dissipation rate in dissipation with swell steepness is interpreted as a laminar to turbulent transition of the boundary layer, with a threshold Reynolds number of the order of 100,000. These observations of swell evolution open the way for more accurate wave forecasting models, and provide a constraint on swell-induced air-sea fluxes of momentum and energy. Citation: Ardhuin, F., B. Chapron, and F. Collard (2009), Observation of swell dissipation across oceans, Geophys. Res. Lett., 36, L06607, doi: 10.1029/2008GL037030.
PY 2009
PD MAR
SO Geophysical Research Letters ( GRL )
SN 0094-8276
PU American Geophysical Union
VL 36
IS L06607
UT 000264679200002
BP 1
EP 5
DI 10.1029/2008GL037030
ID 6452
ER

EF