The Copernicus Sentinel-1 mission takes us over the archipelago of Lofoten in northern Norway.
Extending round 175 km from north to south, the archipelago contains 5 primary islands (Austvågøya, Gimsøya, Vestvågøya, Flakstadøya, and Moskenesøya), in addition to many small islands and skerries (rocky islets and reefs). Lofoten is understood for its distinctive surroundings, with dramatic mountains and peaks, sweeping seashores, deep blue fjords and sheltered bays.
Svolvær, the chief city and port of the Lofoten island group, is positioned on the southern coast of Austvågøya, the easternmost island of the archipelago. The economic system largely will depend on cod fisheries, with the city’s inhabitants swelling in the course of the spawning season as fishermen flock in. The fjord of Vestfjorden lies between the archipelago and the mainland.
Although mendacity solely throughout the Arctic Circle, Lofoten experiences one of many world’s largest elevated temperature anomalies relative to its excessive latitude. Due to a convergence of the Gulf Stream with two underwater currents, the North Atlantic Current and the Norwegian Current, the climate in Lofoten stays anomalously heat.
The colors of this week’s picture come from the mix of two ‘polarisations’ from the Copernicus Sentinel-1 mission which have been transformed right into a single picture. This distant sensing approach permits us to detect the place variations between the polarisations are increased. These variations are seen in shades of blue within the picture, such because the uneven Norwegian Sea, wetlands and mires comparable to these on the northern tip of Andøya and moist snow on hilltops and in mountains (bottom-right nook of the picture).
What seems in yellow signifies what has fewer variations between polarisations, comparable to forests and different vegetated land, in addition to built-up areas.
Sentinel-1 is a radar mission and in contrast to optical cameras, the pictures are often black and white when they’re obtained. By utilizing a expertise that aligns the radar beams despatched and obtained by the instrument in a single orientation – both vertically or horizontally – the ensuing knowledge might be processed in a method that produces colored photos such because the one featured right here. This approach permits scientists to raised analyse Earth’s floor. For extra data on polarimetry, click on right here.
This picture, acquired on 24 November 2020.