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.

Electrical conductivity of the water column; 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; Temperature of the water column; Phytoplankton taxonomic abundance in water bodies; Phytoplankton taxonomic biomass in water bodies

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.

Baltic Organisations Network for Funding Science EEIG
Hämeentie 33
Helsinki

FI-00500
Finland