ecosystems. The campaign integrates ship-based observations from the German research icebreaker RV Polarstern (Expedition BeauPAIR) and the Canadian icebreaker CCGS Amundsen, complemented by airborne surveys [...] global climate feedbacks, and the livelihoods and food security of Inuvialuit communities. RV Polarstern in the Arctic Ocean (Photo: Esther Horvath) From the boreal forest and tundra to the deep ocean [...] Thomas Krumpen Gesine Mollenhauer Anne Morgenstern Project website: www.arcticpulse.ca The Polarstern cruise The main goal of the BeauPAIR campaign (PS161 and PS162) is to assess the effects of hu

Polarstern expedition ANT XXVII-2. Picture: S. Trimborn (Photo: Alfred-Wegener-Institut) Southern Ocean phytoplankton are major drivers of global carbon cycling accounting for 20% of the global annual

Head, Senior Scientist Koch, Florian Scientist, System Manager Laboratories New Building Project Polarstern II Kohlbach, Doreen Head of Young Investigator Group DOUBLE TROUBLE Kong, Xianyu Postdoc ONE-BLUE

dition , the largest Arctic research expedition of our time, during which the research vessel “Polarstern” was frozen in the Arctic ice for a year to study the effects of climate change. Scientists from [...] from the subtropics and Arctic cold fronts? Antarctic expeditions on board the research icebreaker Polarstern take us to the stormy seas of the “Furious Fifties” and “Screaming Sixties” and to the majestic

AWIPEV: Temperature AWIPEV: Radiation Data AWIPEV: Ozone data Meteorological observations on-board RV Polarstern Without reliable weather data polar expeditions and the related fieldwork become a dangerous u [...] 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 [...] essential for forecasting the weather worldwide. Weather balloon (Photo: Esther Horvath) Links Polarstern's Weather Data

terrestrial polar research of high international reputation. The AWI runs the research and supply ship "Polarstern", the research vessel "Heincke", four small research cutters, two research aircraft, a permanently

Floats are 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

CONTRASTS (PS149) Contrasts 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 [...] The aircraft campaign IceBird summer 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 devices. (Graphic: Alfred-Wegener-Institut) On-route measurements and regional surveys With Polarstern, the helicopters and also the aircrafts on the IceBird summer expedition (from Station Nord), we

changes for the biodiversity in 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

North American plate drift apart by a few millimetres every year. Using the research icebreaker “POLARSTERN” scientists study this system of ridges and investigate the effects of the mechanisms involved