This Envisat image features the Strait of Bonifacio, located between the French island of Corsica (top) and the Italian island of Sardinia, and renowned for its rich biodiversity, complex physical configuration and difficult weather conditions.

The image was created by combining three Envisat Advanced Synthetic Aperture Radar (ASAR) acquisitions (19 April, 1 March and 18 February 2011) over the same area. The colours result from changes in the surface between acquisitions.