|Author(s)||Ardhuin Fabrice1, 2, Collard Fabrice3, Chapron Bertrand1, Girard-Ardhuin Fanny1, Guitton Gilles3, Mouche Alexis1, Stopa Justin1|
|Affiliation(s)||1 : IFREMER, Lab Oceanog Spatiale, Brest, France.
2 : UBO, IFREMER, Lab Phys Oceans, CNRS,IRD,UMR 6523, Brest, France.
3 : OceanDataLab, Plouzane, France.
|Source||Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2015-04 , Vol. 42 , N. 7 , P. 2317-2325|
|WOS© Times Cited||49|
|Keyword(s)||ocean waves, SAR, sea ice|
|Abstract||Swell evolution from the open ocean into sea ice is poorly understood, in particular the amplitude attenuation expected from scattering and dissipation. New synthetic aperture radar (SAR) data from Sentinel-1A wave mode reveal intriguing patterns of bright oscillating lines shaped like instant noodles. We investigate cases in which the oscillations are in the azimuth direction, around a straight line in the range direction. This observation is interpreted as the distortion by the SAR processing of crests from a first swell, due to the presence of a second swell. Since deviations from a straight line should be proportional to the orbital velocity toward the satellite, swell height can be estimated, from 1.5 to 5 m in the present case. The evolution of this 13 s period swell across the ice pack is consistent with an exponential attenuation on a length scale of 200 km.|
Ardhuin Fabrice, Collard Fabrice, Chapron Bertrand, Girard-Ardhuin Fanny, Guitton Gilles, Mouche Alexis, Stopa Justin (2015). Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A. Geophysical Research Letters, 42(7), 2317-2325. Publisher's official version : https://doi.org/10.1002/2014GL062940 , Open Access version : https://archimer.ifremer.fr/doc/00256/36718/