Baltic Sea, Gotland Basin

Air temperature; Cloud type; Dissolved oxygen parameters in the water column; Wind strength and direction; Salinity of the water column; Dissolved concentration parameters for other gases in the water column; Temperature of the water column; Atmospheric visibility and transparency

Meteorological packages; discrete water samplers; titrators

Years: 1961-1997 Months: seasonal surveys (February, May, August, October) Location: Standard net of stations in the Central Baltic (16 stations) and standard net of stations in the economical zone of Latvia since 1992 Depth: On all the stations north from 56o10' (Latvia- Lithuania border) all the parameters are determined from the surface till the bottom after each 10 m, on all the stations south from 56o10' all the parameters are determined from the surface till the bottom after each 5 m. Data processing: Till 1992 the salinity was determined with Knudsen method by titrating for Cl, since 1992 - by inductive salinometer (model 601-MIII, YEO-KAL, Australia). Oxygen concentration is determined by Vincler method; till 1993 - titration with burette, since 1994 - by Titration Stand for Oxygen (Dosimat 715, Hydro-Bios).

Latvian Fish Resources Agency
Daugavgrivas str. 8
Riga

LV-1048
Latvia