ig. 5. Panel A: fluctuations of the open polynya area of the Terra Nova Bay during the period of July 2011 and acquisition time of the scenes shown in the lower panels. Panels b1 to d4: typical aspect of the Terra Nova Bay polynya observed during the growing phase by X-SAR COSMO-SkyMed (Himage and HugeRegion scenes) and C-band Envisat WSM ASAR data.