Meso-scale surveys: area restricted by longitude 23° - 24° E and latitude 59° 30 min - 59° 45 min N. Anchor station at 59° 41 min N, 23° 39 min E.

Variable fluorescence parameters; Chlorophyll pigment concentrations in water bodies; Wind strength and direction; Nitrate concentration parameters in the water column; Phosphate concentration parameters in the water column; Primary production in the water column; Salinity of the water column; Horizontal velocity of the water column (currents); Silicate concentration parameters in the water column; Temperature of the water column; Bacterial production in the water column; Zooplankton taxonomy-related abundance per unit volume of the water column; Zooplankton taxonomy-related biomass expressed as carbon per unit volume of the water column; Turbulence in the water column; Visible waveband radiance and irradiance measurements in the atmosphere; Phytoplankton taxonomic abundance in water bodies; Density of the water column; Phytoplankton taxonomic biomass in water bodies

Fluorometers; current profilers; CTD; CTD undulators; discrete water samplers; cameras; autoanalysers; liquid scintillation counters; microstructure sensors; current meters

The cruise consisted of five mesoscale towed CTD/fluorometer surveys to obtain hydrographical background and four 24 h intensive biological-chemical studies at an anchor station. During the mesoscale surveys temperature, salinity and fluorescence were measured and samples for phytoplankton analyses were taken from the depth of ca. 5 m with a flow-through system. During the anchor station studies CTD/fluorometer, turbulence, particle size distribution measurements were made and samples taken. Dominant hydrographical features were the sharp salinity front along the Finnish coast and cold upwelling filament originating from Estonian coastal zone. The cruise schedule and measurements are presented in Annex 1.

Baltic Organisations Network for Funding Science EEIG
Hämeentie 33
Helsinki

FI-00500
Finland