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Reindeer Island

22 December 2017

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The Copernicus Sentinel-2 mission takes us over part of Lake Winnipeg in the Canadian province of Manitoba on 6 October 2017, with Reindeer Island visible in the lower-right part of the image.

Smaller islands can be seen along the edges of the image, while the swirling shades of green in the waters is an algal bloom.

Although algae grows naturally in the lake, high levels of phosphorus - found in fertilisers and common household products - seeping into the water have caused a steady surge of toxic cyanobacteria, or blue–green algae, posing a threat to ecology and human health.

Sentinel-2's frequent revisits over the same area and high resolution allow changes in inland water bodies and the coastal environment to be closely monitored.

Reindeer Island

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Discover more about our planet with the Earth from Space video programme. Join ESA every Friday at 10:00 CEST for an 800 km-high tour with spectacular images from Earth-observing satellites.

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The Earth Watching project is an ESA/ESRIN service to help local authorities and to promote the benefits of remote sensing data during emergencies, sending images and articles to newspapers, magazines and TV stations.

The Earth Watching website features not only imagery of natural disasters, but also promotes various satellite remote sensing applications through images and articles. Some examples are shown in the special events part of the website.

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