SYKE Alg@line network in the Baltic Sea monitors the state of the sea and detects algal blooms. Several millions of data points are collected annually from the Baltic Sea, using a fleet of ferries operated by shipping companies.
Ferries are equipped with flow-through systems (usually called 'Ferryboxes') with spatial measurement resolution of about 200 m. The data recording has the geo-reference logging from GPS. Ferryboxes incorporate a thermosalinograph, chlorohyll, phycocyanin and CDOM fluorometers, turbidity meter and refrigerated sampling unit providing discrete water samples for laboratory analyses (e.g. microscopy, FlowCAM, nutrients, optical analysis, and experimental work).
Additional flow-through sensors e.g. for primary production (FRRF) and light reflectance are used periodically. New sensors for pH and pCO2 were implemented in 2018. One of the Algaline routes (Helsinki-Stockholm) passes approximately 10 km south of the Atmospheric and Marine Research Station Utö.
Currently 2 ferryboxes are operated by SYKE Marine Research Center, partly in collaboration with Finnish and international parties:
- FINNMAID (Finnlines) cruising between Helsinki-Travemünde twice a week (Partner: IOW, Germany).
- SILJA SERENADE (Tallink) is cruising between Helsinki and Stockholm daily (Partners: City of Helsinki, Finland; Uusimaa Ely Centre, Finland).
Ferrybox data from Silja Serenade is visualized at FMI server.
State of the Baltic Sea monitored by Alg@line:
- Algaline ferrybox observations at Lake & Sea Wiki updated once per hour
Dr. Seppo Kaitala
e-mail firstname.surname (at) environment.fi
Marine Research Centre, SYKE