Earth from House: Maritime highways within the Øresund Strait

This picture from the Copernicus Sentinel-1 mission exhibits us the maritime visitors passing by way of theØresund Strait in 2025.

Zoom in or click on on the circles to discover this picture at its full 10 m decision.

The 118-km-long Øresund Strait (often known as the Sound) separates Denmark to the west from Sweden to the east and hyperlinks the Baltic Sea to the North Sea, which makes it one of many busiest waterways on this planet.

Sentinel-1 satellites carry radar devices to supply an all-weather, day-and-night provide of images of Earth’s floor, making it best to watch ship visitors. Right here, greater than 50 radar pictures over the identical space, acquired each six days all through 2025, have been compressed right into a single picture.

Radar information are interpreted by learning the depth of the backscattered radar sign. Areas the place the radar sign is mirrored away from the satellite tv for pc, corresponding to water our bodies and clean surfaces, seem darker, whereas areas the place the sign is mirrored again to the satellite tv for pc, corresponding to city areas, metallic objects or exhausting infrastructure, seem lighter.

On this picture, ships seem as brilliant, sparkly dots at the hours of darkness waters of the strait. The routes of marine visitors are clear to see within the channel with the primary transport lanes highlighted by the focus of ships.

Most notable are the high-density clusters of brilliant factors close to the ports of Copenhagen and Malmö. These are ‘ready areas’ the place ships stay stationary for longer intervals, growing the chance of being captured throughout a number of satellite tv for pc passes. 

Copenhagen, Denmark’s capital, is close to the centre of the strait on the jap aspect of the islands of Zealand and Amager. Copenhagen Airport is seen as a cross-shaped, black construction on the jap aspect of Amager.

The brilliant, elongated function within the strait in entrance of the airport is the factitious island of Peberholm. It’s a part of the Øresund Bridge, a mixed bridge-tunnel throughout the strait that connects Copenhagen with the town of Malmö on the Swedish coast. Peberholm serves as a crossover level between the bridge, seen as a skinny, white line to its jap finish, and the Drogden underwater tunnel on the Danish aspect.

The geometric patterns of dots, seen south of the bridge about 10 km off the Swedish coast, are the generators of the Lillgrund Wind Farm, which is Sweden’s largest offshore wind farm. One other group of wind generators could be seen off the coast of Copenhagen harbour: the 20 generators of the Middelgrunden offshore wind farm seem as a 3.4-km-long string of pearls at the hours of darkness water of the strait.