a few millimetres every year. Using the research icebreaker “POLARSTERN” scientists study this system of ridges and investigate the effects of the mechanisms involved in the spreading process: volcanism

this area. Physical, biogeochemical and ecological studies with Polarstern in the FOS in the southern Weddell Sea shall characterize this hotspot in detail in order to recognize and predict changes. In

( Neumayer_III ), in the Arctic (AWIPEV ) and on the oceans ( Polarstern ) automatic weather stations (AWS) are in use. The numbers of the AWS-systems and their locations are chosen with respect to the

seabed sediment composition (e.g., soft sediment, rock, etc.). Polarstern has a hull-mounted Teledyne Atlas HYDROSWEEP DS III (HSDS3) full ocean-depth MBES permanently installed. It operates with frequencies

of sea ice regimes in the Arctic Ocean during melt season The Polarstern expedition CONTRASTS (2 July to 1 September 2025, also named PS149, ArcWatch-3) investigates the causes and consequences of sea [...] 2025 complements with regional surveys. Sea ice station with Polarstern (example from MOSAiC 2020). The vessel is moored to the ice floe. Measurements are performed and autonomous stations are installed [...] of key parameters of the atmosphere-ice-ocean system. The Polarstern expedition East Greenland Current Sources (PS150) is realized after the CONTRASTS expedition from 4 September to 23 October 2025

free drifting underwater buoys Fig. 1: The research vessel "Polarstern" in antarctic waters. The antenna of a deployed float is visible in the foreground. (Photo: Alfred-Wegener-Institut) Floats are

reputation. The AWI runs the research and supply ship "Polarstern", the research vessel "Heincke", four small research cutters, two research aircraft, a permanently manned station each in the

close this knowledge-gap, swath bathymetric data acquired by FS Polarstern over the last two decades is investigated to identify glacial landforms. This investigation will improve our understanding of the

for the purpose of these so-called tie measurements. On board Polarstern, underway measurements are made using a KSS-32 gravimeter from Bodenseewerke. Airborne measurements in Polar 5 or Polar 6 are

Data AWIPEV: Ozone data Meteorological observations on-board RV Polarstern Without reliable weather data polar expeditions and the related fieldwork become a dangerous undertaking. For this reason there are always two meteorologists working on-board Polarstern. They constantly update the captain and officers, the helicopter crew and the chief scientist about the latest and up-coming [...] weather worldwide. Weather balloon (Photo: Esther Horvath) Links Polarstern's Weather Data