Raft-forming blue green algae have been observed, e.g., in the northern part of the Sea of Åland. Sentinel-2 observed these fibrous swirls of algae in the municipality of Eckerö on 27 July 2020. Contains modified Copernicus data, SYKE (2020).

Typical amounts of cyanobacteria occurrences have been observed in sea areas, in lakes occurrences have been observed less than average

Algal bloom monitoring July 30, 2020 Finnish Environment Institute
Cyanobacteria have been observed in both sea areas and lakes. In the sea areas, cyanobacteria are mostly mixed in the water due to strong winds. In the coastal areas, cyanobacteria have been observed mostly in the Gulf of Finland, the Archipelago Sea and the Bothnian Sea. In lakes, amounts of cyanobacteria have been slightly increasing since last week due to warm weather during last weekend. Cyanobacterial situation is typical for this time of summer; cyanobacteria are most abundant usually in the end of July and in the beginning of August.

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Algal bloom monitoring July 30, 2020: Typical amounts of cyanobacteria occurrences have been observed in sea areas, in lakes occurrences have been observed less than average

2020-07-30

In sea areas cyanobacteria occurrences have increased, which is typical for late July and early August. Windy weather has kept cyanobacteria mixed in the water bodies, therefore extensive surface blooms have not been observed in sea areas. In lakes cyanobacteria occurrences have been observed less than usual in most parts of Finland. Occurences have increased only in the regions of North Karelia and Central Finland, where they are above average.