FN Archimer Export Format
PT J
TI Wave Attenuation Through an Arctic Marginal Ice Zone on 12 October 2015: 2. Numerical Modeling of Waves and Associated Ice Breakup
BT 
AF ARDHUIN, Fabrice
   BOUTIN, Guillaume
   STOPA, Justin
   GIRARD-ARDHUIN, Fanny
   MELSHEIMER, Christian
   THOMSON, Jim
   KOHOUT, Alison
   DOBLE, Martin
   WADHAMS, Peter
AS 1:7;2:1;3:1;4:1;5:2;6:3;7:4;8:5;9:6;
FF 1:;2:PDG-ODE-LOPS-SIAM;3:;4:PDG-ODE-LOPS-SIAM;5:;6:;7:;8:;9:;
C1 Univ Brest, CNRS, IRD, Lab Oceanog Phys & Spatiale,IUEM,IFREMER, Brest, France.
   Univ Bremen, Inst Environm Phys, Bremen, Germany.
   Univ Washington, Appl Phys Lab, Seattle, WA 98105 USA.
   Natl Inst Water & Atmospher Res, Christchurch, New Zealand.
   PolarScientfic Ltd, Appin, Scotland.
   Cambridge Polar Consultants Ltd, Cambridge, England.
C2 IFREMER, FRANCE
   UNIV BREMEN, GERMANY
   UNIV WASHINGTON, USA
   NIWA, NEW ZEALAND
   POLARSCIENTFIC LTD, UK
   CAMBRIDGE POLAR CONSULTANTS LTD, UK
   CNRS, FRANCE
SI BREST
SE PDG-ODE-LOPS-SIAM
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-int-hors-europe
IF 3.235
TC 27
UR https://archimer.ifremer.fr/doc/00462/57372/59439.pdf
LA English
DT Article
DE ;wind-waves;sea ice;WAVEWATCH III;SAR;Beaufort;Arctic
AB Many processes that affect ocean surface gravity waves in sea ice give rise to attenuation rates that vary with both wave frequency and amplitude. Here we particularly test the possible effects of basal friction, scattering by ice floes, and dissipation in the ice layer due to dislocations, and ice breakup by the waves. The possible influence of these processes is evaluated in the marginal ice zone of the Beaufort Sea, where extensive wave measurements were performed. The wave data includes in situ measurements and the first kilometer-scale map of wave heights provided by Sentinel-1 SAR imagery on 12 October 2015, up to 400 km into the ice. We find that viscous friction at the base of an ice layer gives a dissipation rate that may be too large near the ice edge, where ice is mostly in the form of pancakes. Further into the ice, where larger floes are present, basal friction is not sufficient to account for the observed attenuation. In both regions, the observed narrow directional wave spectra are consistent with a parameterization that gives a weak effect of wave scattering by ice floes. For this particular event, with a dominant wave period around 10 s, we propose that wave attenuation is caused by ice flexure combined with basal friction that is reduced when the ice layer is not continuous. This combination gives realistic wave heights, associated with a 100-200 km wide region over which the ice is broken by waves, as observed in SAR imagery.
PY 2018
PD AUG
SO Journal Of Geophysical Research-oceans
SN 2169-9275
PU Amer Geophysical Union
VL 123
IS 8
UT 000445188900036
BP 5652
EP 5668
DI 10.1002/2018JC013784
ID 57372
ER

EF