|Date||Thu, 02 Apr 2015 16:18:51 +0200|
PhD position in ocean waves-sea ice interactions at IFREMER-CNRS (Laboratoire d'Océanographie Spatiale and Laboratoire de Physique des Océans)
Brest – France
Title : Ocean waves in sea ice : scattering, dissipation and breaking of the ice
Direction by Fabrice Ardhuin, co-direction : Fanny Girard-Ardhuin
Master in Oceanography or Meteorology, Knowledge in statistics, experience in programming with MatLab, IDL. Motivated candidate, team spirit.
Application deadline : 27 April 2015
The application should be submitted by email to email@example.com
The rapid evolution of the Arctic sea ice cover is opening up more waters and exposing the thinner ice to more powerful storms (e.g. Thomson and Rogers, 2014). At present the evolution of ocean waves in sea ice is still very crudely modelled. Both LOS and LPO laboratories in Brest-France are currently involved in two projects to analyse the evolution of waves in the ice and advance the parametrizations of wave-ice interactions in both wave models and ice models. One project is SWARP (FP7 led by NERSC) the other is the “Sea state” department research initiative of the U.S. Office of Naval Research (PI Fabrice Ardhuin, in collaboration with E. Rogers).
The novel modelling capabilities and dedicated field experiments (R/V Sekuliak cruise, Fall 2015) are great opportunities to test our understanding of wave-ice interaction processes and their role in the demise of the Arctic sea ice. We will also combine in situ data and numerical models with wave measurements from satellite altimeter and ice properties from radiometers and scatterometers sensors onboard satellites in order to understand and interpret the high resolution wave signatures in back-scatter data from the recently launched Sentinel-1 satellite. This may provide useful algorithms for analysing anisotropic modulations in backscatter data from the future CFOSAT mission.
Ardhuin, F., B. Chapron and F. Collard (2009) Observation of swell dissipation across oceans, Geophys. Res. Lett., 36, L06607
Girard-Ardhuin, F. and R. Ezraty, 2012 : Enhanced Arctic sea ice drift estimation merging radiometer and scatterometer data. IEEE Trans. Geosci. Remote Sensing, vol. 50, Issue 7, Part I, July 2012, pp 2639-2648. DOI : 10.1109/TGRS.2012.2184124
Kohout and Meylan, 2008 : An elastic plate model for wave attenuation and ice floe breaking in the marginal ice zone, Jeophys. Res. Letter, vol 113 DOI: 10.1029/2007JC004434
Queffeulou P., 2004 : Long-term validation of wave height measurements from altimeters. Marine Geodesy, 27, 495-510
Stroeve, J., J.C. Markus, L. Boisver, J. Miller, A. Barret, 2014 : Changes in Arctic melt season and implications for sea ice loss. Geophys. Res. Letter DOI: 10.1002/2013GL058951
Squire, 2007 : Of ocean waves and sea-ice revisited. Cold Reg. Sci. Tech., 49, 110-133.
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