European Directory of Marine Environmental Data (EDMED)

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Data set name

Cyanobacterial blooms in the Gulf of Finland 1993

Data holding centreFinnish Environment Institute
CountryFinland  Finland
ProjectHydrodynamical control of cyanobacterial blooms in the Baltic Sea: the effect of small-scale turbulence.
Time period12.- 24.7.1993
Geographical area

Pilot grid stations and meso-scale surveys: area restricted by longitude 21° 50 min - 22° 40 min E and latitude 59° 05 min - 59° 21 min N. Biological-chemical samplings were made at five stations along transect 22° 12 min E.


Phytoplankton taxonomic biomass in water bodies; Electrical conductivity of the water column; Chlorophyll pigment concentrations in water bodies; Wind strength and direction; Nitrate concentration parameters in the water column; Phytoplankton taxonomic abundance in water bodies; Phosphate concentration parameters in the water column; Primary production in the water column; Salinity of the water column; Temperature of the water column


Fluorometers; CTD; discrete water samplers; salinity sensor; autoanalysers; liquid scintillation counters


The cruise started on 12-14 July with a pilot survey at 12 grid stations. Vertical profiles of CTD, nutrient samplings and semiquantitative analysis of phytoplankton were made. During 15-23 July and intensive meso-scale biological-chemical-physical study was carried out. This consisted of: a) Repeated every night mapping of meso-scale hydrodynamical and fluorescence fields with an undulating CTD and surface flow-through measurements (temperature, salinity, density) b) Daily biological and chemical investigations at 5 sampling stations along transect 22 ° 12 min E selected on the basis of the previous night's meso-scale survey. Biological measurements were made from an integrated sample representing the upper mixed layer. Special attention was paid on frontal dynamics in changing wind conditions.

OriginatorsFinnish Institute of Marine Research (FIMR)
OrganisationFinnish Environment Institute
ContactKaisa Kononen (executive director)

Baltic Organisations Network for Funding Science EEIG (BONUS)
Hämeentie 33


Telephone+358 40 581 1189
Collating centreFinnish Institute of Marine Research (FIMR)
Local identifier19001038
Global identifier2064
Last revised2009-11-23