Cruise report from R/V Argos week 41, 1996

Type: Report
Author: Lars Andersson


The surface water temperatures varied between 12 -13 degrees in the Skagerrak-Kattegat area and between 10.5-12.5 in the Baltic Proper. The surface layer was depleted of nitrate and the rest of the nutrients showed low values in the Skagerrak-Kattegat. The oxygen situation in the Kattegat deep water was unusually good, there were no values below 3 ml/l. In the Baltic phosphate concentrations varied between 0.10 and 0.20 umol/l while silicate varied between 5 and 10 umol/l. Hydrogen sulphide was present in the Bornholm basin from 80 meters, at the Gotland Deep from 200 meters and in the Fårö Deep from 150 meters. The concentrations of hydrogen sulphide in the bottom water had increased with a factor of two since the expedition in September.