Spring Bloom.

The figure shows measurements collected by Kaprifol, our SeaExplorer underwater vehicle, over a 3 week period in the Bornholm Basin. The brighter colors show increasing amounts of chlorophyll, a pigment found in microscopic algae called phytoplankton, in the shallow waters.

In the spring, the Baltic Sea goes from an environment with little phytoplankton to one teeming with life. Concentrations of phytoplankton can multiply by a factor of a hundred over a few short days.

Our gliders, by remaining present throughout the year and collecting high-definition measurements like these, are able to see these incredibly important and rapid processes to better understand life in the Baltic Sea. This image here was reconstructed using over 1.7 million measurements just in those 3 weeks!