Hydrochemical and hydrological observations in the Baltic Sea and Gulf of Riga

The description is made. The data set contains information on marine monitoring observations since 1995 (it is gradually supplemented after the quality check of historical data). Group of parameters: water salinity (PSU), temperature (oC), dissolved oxygen (ml/l), biogenic substances (umol/l) — total P and N, phosphates, nitrites, nitrates, ammonia, silicates, pH and turbidity. The data set is intended to perform data quality control according to the criteria developed by the SeaDataNet Consortium. Data quality control has currently not been carried out and no quality values have been assigned to the data. The data user assumes full responsibility for the use of unverified data.