Cruise report from R/V Argos week 26, 1996

Type: Report
Author: Björn Sjöberg


In the eastern Skagerrak there were a bloom of a flagellate, Emiliania Huxlley, which gave the surface water a turkos colour and caused low visibility with secchii depths <3m. The surface temperatures varied between 14-15 deg in the Skagerrak-Kattegatt and between 11-13 in the Baltic Proper. The surface layer was generally depleted of nutrients. Fluorocens measurements indicated a subsurface bloom in the whole area between 10 and 20 depth. Continuously measurements of fluorocens at 4 m depth showed highest values just outside of Skagen and in the eastern Gotland basin. There were low oxygen values (< 2ml/l) below 70-100 m depth in the Bornholm basin, the Hanö bight and in the basins east, north and west of Gotland.