Cruise report from R/V Aranda week 46, 2014

Type: Report
Author: Lars Andersson


The water temperature in the surface layer was still above normal in all areas. Surface nutrients showed, for the season, almost normal values, except for silicate in the Baltic Proper. At the station BY1 in the Arkona Basin all nutrients showed increased values.

In the Bornholm Basin and Hanö Bight acute hypoxia (< 2 ml/l) was present from depths exceeding 70 meters. In the Eastern Gotland Basin completely anoxic conditions were found from depths exceeding 125 meters (at BY20 already from 80 m) and acute hypoxia from 60 - 80 meters. In the Western Gotland Basin the oxygen situation was serious as acute hypoxia already occurred from depths exceeding 70 meters and hydrogen sulphide from 80-90 meters depth.