largest marine research alliances. The DAM aims to strengthen the sustainable use of coasts, seas and oceans through research and transfer, data management and digitalisation, and by coordinating the infra [...] Survey United Kingdom University of Alaska Fairbanks United States Norwegian Polar Institute Norway Arctic and Antarctic Research Institute (AARI) Russia University of Tromso (UiT) Norway IFREMER France Woods

Polarstern returns from the “Trans-Arctic Survey of the Arctic in Transition” (TransArc) expedition, intended to record physical, biological and chemical changes in the Arctic Ocean. One highlight of the expedition: [...] 2012-10.2012 – During the Polarstern’s 27th stay in the Arctic and in the context of the “Sea ice - ocean - seafloor interactions in the changing Arctic” (IceAr) expedition, e.g. long-term changes in this [...] on yet another Arctic expedition – its 29th. The expedition, officially designated “Transitions in the Arctic Seasonal Sea Ice Zone” (TRANSSIZ), was planned by the international “Arctic in Rapid Transition”

change. The towed high resolution camera system OFOS (Ocean Floor Observing System) is used to index megafauna and plastic litter on the Arctic sea floor. ROV To observe the sea-ice system from below [...] Light is important for the surface energy budget and the biological activity in the ice & the upper ocean. Radiation stations determine the fraction of incident light which is reflected by the surface or [...] novelty in under-ice robotics. BioOptical Platform Sinking particles control CO2 transport to the deep ocean. AWI and MARUM researchers developed the BioOptical Platform BOP, which combines a camera system and

biogeochemical processes within the Arctic Ocean, as well as how these are linked to the Atlantic Ocean. AWI scientists are developing the world’s first multi- resolution Ocean General Circulation Biogeochemical [...] built up. Data assimilation into coupled ecosystem- ocean-ice models will enable the identification of phytoplankton variability and trends of surface-ocean processes and their bio-physical coupling. Remote [...] Sensing (Graphic: Alfred-Wegener-Institut) Modelling To predict upcoming changes in global ocean circulation, ocean productivity, and the consequences for the global climate system, it is crucial to improve

questions,” says Christian Bock, “for example, how the warming and acidification of waters in the Arctic due to climate change will affect those animals that are perfectly adapted to living in the cold [...] oxygen. For top athletes, the lactate level is a way of measuring their fitness. In contrast, for Arctic fish that are subjected to rising temperatures, the lactate is an indicator that they are consuming [...] spectrometer with cryoprobe. Discover more A view inside – a fish in the NMR Integrative Ecophysiology Ocean Acidification

Topics All Biodiversity Ice Sea Climate Regions All Arctic Antarctic North Sea Biodiversity Climate Arctic Arctic Species in Climate Change The Arctic is a habitat for specialists. Species living in the [...] conditions in the Arctic have changed more rapidly than in virtually any other ecosystem on the planet. Find out more Ice Climate Sea Arctic Antarctic Sea Ice Broad expanses of the Arctic Ocean and the Southern [...] Southern Ocean in the Antarctic are covered in sea ice. The ice plays a vital role in our climate system and is an important component of Arctic and Antarctic habitats. Find out more Sea Climate Arctic Antarctic

changed with them. When it comes to surviving in the Arctic, it’s a whole new ball game. Arctic sea ice at sunrise (Photo: Stefan Hendricks) The Arctic Ocean Unlike at the southern tip of the planet, in the [...] continent, only an ocean. These waters, also known as the Arctic Ocean, extend to the northern coasts of Scandinavia, Russia, North America and Greenland. They lie completely within the Arctic Circle and are [...] Pole, the Arctic magnetic pole and the Arctic geomagnetic pole. Measuring 4,000 kilometres long, 2,400 kilometres wide and covering an area of roughly 14 million square kilometres, the Arctic Ocean is the

in different Arctic environments. Contact: A. Boetius, C. Bienhold, M. Wietz Literature: Cardozo Mino, M., Fadeev, E., Salman-Carvalho, V., Boetius, A. (2021). Spatial Distribution of Arctic Bacterioplankton [...] Effects of Ice-Algal Aggregate Export on the Connectivity of Bacterial Communities in the Central Arctic Ocean. Frontiers in Microbiology 9. doi: 10.3389/fmicb.2018.01035 Hoffmann, K., Hassenrück, C., Sal [...] Boetius, A. (2014): Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean. PLOS One 9(9): e107452. doi:10.1371/journal.pone.0107452 Jacob, M., Soltwedel, T., Boetius, A

and temporal variation in deep-sea meiofauna at the LTER Observatory HAUSGARTEN in Fram Strait (Arctic Ocean). MDPI - Diversity 12 (7). doi: 10.3390/d12070279 Käß, M., Vedenin, A., Hasemann, C., Brandt, [...] biomass of three epibenthic invertebrates from the deep-sea observatory HAUSGARTEN (Fram Strait, Arctic Ocean). Marine Ecology-Progress Series 602: 15-29. Grzelak, K., Kotwicki, L., Hasemann, C., Soltwedel [...] assessing temporal variations in benthic community structure, megafaunal composition and diversity at the Arctic deep-sea observatory HAUSGARTEN between 2004 and 2015. Deep-Sea Research I 122: 81-94. Vedenin, A

of sea-ice and ocean dynamics in the Laptev Sea and to investigate the ecological consequences of environmental changes in key regions of the transpolar drift, and to study effects of ocean acidification [...] Furthermore, the Deep-Sea Research Group leads the Helmholtz infrastructure project FRAM (Frontiers in Arctic marine Monitoring) and is also partner of the Helmholtz alliance ROBEX (Robotic Exploration of Extreme