The oceanographic group has continuously carried out measurements with the ship Conductivity Temperature Depth (CTD) profiler. This instrument provides high resolution data of temperature, salinity, chlorophyll and oxygen throughout the water column which helps us recognize which different types of water that are present at each site, and how their position in the water column changes from place to place or from time to time. With the 24 bottles attached on the steel frame, we can also collect water from any depth for further analyses. Most profiles have been made all way down to bottom depth, which often has been greater than 1 000 meters during our journey. During our weeks at sea we have followed the changes of Atlantic water and seen the seasonal melting of sea ice affect the surface waters.
During the ice floe drift, a 200 meter deep mooring line was deployed from the ice equipped with Acoustic Doppler Current Profilers and temperature/salinity sensors. The main information supplied by this mooring are the prevailing water velocities but it is also possible to analyze e.g. the daily patterns for vertically migrating organisms. If such patterns can be identified, we have a good chance of understanding what kind of organisms we see, by using the information collected by the biological groups during the cruise.
A particle analyzer (LISST) was several times deployed together with the CTD and separately under the ice (see Fig. 3). LISST determines the sizes of the particles present in the water. This can be used together with other measurements to understand processes such as vertical migration and sedimentation.
Best regards from Scientists and Crew,
Andreas Macke, chief scientist
With contributions from Simonas Kecorius, Marcel Nicolaus, Anna Nicolopoulos, Mathias Palm, Natascha Oppelt