Archive of News and Press Releases

PS118 - Weekly Report No. 8 | 1 - 7 April 2019

End of work and journey home

[08. April 2019] 

During the past week, we finished our work in the Powell Basin, collected another glider and started our homeward journey to Punta Arenas. By now, we have reached the Strait of Magellan. Tomorrow morning, we will pick up the pilot for the passage through the Magellan Strait and into Punta Arenas where we should arrive in the afternoon.

Before leaving, we did more geothermal heat flow measurements, OFOBS dives and bathymetric surveys In the Powell Basin. As the second last activity, we collected the glider we had deployed on the 18th of March. Last-but-not-least, the oceanographers deployed the last CTD. When the last CTD was back on deck on the 4th of April at 12:00, Polarstern turned her bow to the north and commenced her transit across the Drake Passage to Punta Arenas. For us, this meant packing containers, cleaning labs, storing samples and backing-up data. By now, almost all of these chores are completed and the farewell reception in the Blue Saloon was a nice moment to reflect on the past two months.

With hindsight, I feel that expedition PS118 consisted of three loosely connected parts. The first part was the attempt to reach Larsen C and the A68 breakup area with the all emphasis on travelling southwards constantly hoping that sea ice, winds, and tides would be in our favour. Eventually, it became obvious that we could not even make progress through the ice slush between thick ice floes. On the 3rd of March, we decided to abort the attempt to reach Larsen C. Then, the second part started. It covered the northward journey and sampling in the Weddell Sea. For me as a greenhorn chief scientist on Polarstern, it was interesting to experience how the sea ice dictates all scientific activities. Most plans I made during this phase of the expedition had a rather short expiry date. This part ended when we passed Rosamel Island and left the Weddell Sea. The third part covered our work in the Powell Basin when we soon settled into sampling and surveying routines.

As always, towards the end of the expedition, time was flying. Luckily, enough scientific questions remain unanswered to make returning to this part of Antarctica for further research worthwhile.

I hope everybody on board enjoyed the expedition as much as I did. Amazing scenery, breath-taking wildlife and the feeling of extreme remoteness are only some of the impressions and experiences to take home.

Now with Punta Arenas almost in sight, I would like to thank the people on board who with their effort and enthusiasm have constantly kept the spirits up. For the last time during PS118, I sent best regards on behalf of all expedition participants from Polarstern.

Boris Dorschel

Contact

Scientific Coordination

Rainer Knust
+49(471)4831-1709
Rainer Knust

Assistant

Sanne Bochert
+49(471)4831-1859
Sanne Bochert