Weekly Reports Polarstern

The Expedition PS112 Punta Arenas - Punta Arenas

Cruise leg PS112 of RV Polarstern will commence on 17 March 2017 in Punta Arenas (Chile) and end on 6 May 2017 in Punta Arenas (Chile) The main aim of the voyage is based on three third party funded projects POSER (POpulation Shift and Ecosystem Response – Krill vs. Salps) funded by the Ministry of Science and Culture of Lower Saxony (MWK), PEKRIS (The performance of Krill vs. Salps to withstand in a warming Southern Ocean), funded by the German Ministry of Education and Research (BMBF), and KrillBIS (Krill stock assessment in the Southern Ocean) under the umbrella of CCAMLR (Commission of the Conservation of Marine Leaving Resources), funded by the German Ministry of Nutrition and Aquaculture (BMEL).

In the project POSER (POpulation Shift and Ecosystem Response – Krill vs. Salps), we aim to understand population shifts in krill versus salps due to anthropogenic warming in the western Atlantic sector of the Southern Ocean, and the consequences of such shifts on plankton community structure, biodiversity and biogeochemical cycles. PEKRIS act as complementary project to POSER and will investigate the physiological and genetic traits of krill vs. salps supporting potential adaptation to temperature rise. Up to now, only few studies on the response of krill to anthropogenic stressors exist. Almost no equivalent data are available for salps. The overall goal of KrillBIS is the collection of krill and salp stock data for CCAMLR, north of the Antarctic Peninsula to fulfill the objectives set by CCAMLR for developing an adaptive management of the Antarctic krill stock in the Atlantic sector of the Southern Ocean.


PS111 - Weekly Report No. 7 | 3 - 9 March 2018

Across the Weddell Sea

[12. March 2018] 

Pteropods spend their life cycle in the water column. The organisms actively “fly” through the water, by using their feet, which transform into two wings. The Pteropods calcium shell is made of Aragonite, which makes them especially vulnerable to ocean acidification. The increasing amount of carbon dioxide in the atmosphere leads to an increased absorption of CO2 in the cold waters of the polar oceans and enhances the acidification there.

PS111 -Weekly Report No. 6 | 24 February - 2 March 2018

From the Northern Transect to Halley Bay

[05. March 2018] 

A third transect from this week now also covers the Northern part of the Filchner Depression. Net and water samples as well as short sediment cores kept all research groups on Polarstern busy 24 hours a day.

PS111 – Weekly report #5 | 17 - 23 February 2018

Ice and water in the Filchner Depression

[26. February 2018] 

Favourable ice conditions and stable weather with southwesterly winds enabled Polarstern to go far south into the Filchner Depression and to cross directly in front of the Filchner Ice Shelf close to 44° W this week.

PS111 – Weekly Report No. 4 | 10 - 16 February 2018

From the Ronne Ice Shelf Polynya

[19. February 2018] 

During this week we completed a transect along the Ronne Ice Shelf front, extending from 50°W to 60°W. Every instrument on board has been used.

PS111 – Weekly Report No. 3 | 3 - 9 February 2018


[13. February 2018] 

This week’s work on PS111 was focused on moorings. Instruments, which have stayed in the water for up to 4 years, were retrieved and re-deployed.