| Abstract | The aim of the study is to assess the status of the marine environment
in the Estonian waters (including EEZ). Temperature, salinity, water
transparency, oxygen content is measured and samples are collected for
analyses of nutrient content and biological parameters. Six seasonal
cruises are carried out in the Estonian waters with measurements at
least at 18 stations. Autonomous measurements are conducted using a
flow-through system (Ferrybox) installed onboard a passenger ferry
Tallinn-Helsinki. Samples are collected 12 times a year from 3
monitoring points by the Ferrybox system, where nutrient and chlorophyll
a content and phytoplankton species composition, abundanca and biomass
are analyzed.
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