Image of the week: Baltic Sea phytoplankton bloom

Watching our Earth

This week’s image shows phytoplankton blooms in the Baltic Sea, near the island of Gotland. The image was captured by one of the Copernicus Sentinel-3 satellites on 26 June 2024.

Last Updated

14 November 2024

Published on

31 October 2024

The green swirls that are visible on the sea surface are caused by phytoplankton, which are microscopic marine algae.

Phytoplankton play a key role in marine ecosystems as the basis of the food chain.

Phytoplankton bloom

The image was captured by the OLCI instrument onboard one of the Copernicus Sentinel-3 satellites on 26 June 2024.

EUMETSAT operates the Copernicus Sentinel-3 satellites, in cooperation with ESA, and delivers the marine data on behalf of the European Union.

More info

Learn more about how algal blooms are monitored using Copernicus Sentinel-3 and other satellites.

Visualise Copernicus Sentinel-3 data with EUMETView or Sentinel-2 and -3 data with WEkEO

Access ocean data from EUMETSAT User Portal

Access the Copernicus Marine Service

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