Focus Arctic Pulse Antarctica InSync MOSAiC Expedition UN Decade of Ocean Science UN Plastics Treaty UN Ocean Treaty UN Climate Change Conference [...] Circulation in the Arctic Ocean and the Nordic Seas Southern Ocean - Overturning Circulation Ocean-Ice Shelf Interaction Southern Ocean climate interactions [...] Long-term observations in the Arctic Ocean Fram Strait Central Arctic Observing systems Long-Term Observations in the Southern Ocean Technology and Logistics Results

Climate Research
The Arctic Ocean in summer will very likely be ice free before 2050, at least temporally. The efficacy of climate-protection measures will

Gelatinous zooplankton from the Fram Strait region, Arctic Ocean (Photo: Mario Hoppmann/AWI) Gelatinous zooplankton, comprising cnidarians, ctenophores and tunicates, are known to be major [...] ARJEL: How diverse are gelatinous zooplankton communities in the Arctic Ocean? Since gelatinous zooplankton are fragile and easily fragmented, there are some biases associated with net and trawl sampling [...] studies with the secondary user projects “ICE-Jelly” on the Arctic campaign PS131 and “SO-Jelly” in the Southern Ocean during PS134. Finally, we also carry out trophic studies investigating the role

Svalbard region? Svalbard is a key region of climate change in the Arctic. On the one hand it is close to the Atlantic water inflow to the Central Arctic Ocean, and on the other hand it is located along [...] stations in the Ny-Ålesund Atmosphere Flagship Program , and with Arctic wide observations in the International Arctic Systems for Observing the Atmosphere (IASOA) . Major activities are related to various [...] and StratoClim . Spitsbergen: Hotspot of climate change in the Arctic. (Graphic: Alfred-Wegener-Institut)

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., Salman-Carvalho, V., Holtappels, M [...] 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., Ramette, A. (2013): Biogeography [...] at regional scale in the deep Fram Strait (LTER HAUSGARTEN, Arctic), PLOS One 8:9, doi: 10.1371/journal.pone.0072779 Further Links: ERC-Project ABYSS

Earth System Models We simulate Arctic sea ice for the past, current and possible future climates, with regional sea ice-ocean and Earth System Models. Regional ocean-sea [...] but have the advantage of simulating the atmosphere model, the ocean and the sea-ice simultaneously. Earth System Models (ESMs) additionally include vegetation and chemistry modules. These models allow [...] al., 2014 ). We test those parameterizations in regional sea ice ocean models such as NAOSIM ( Köberle and Gerdes, 2003 ) and an Arctic model set-up of the MITgcm ( Castro-Morales et al., 2014 ). After

tightly coupled to the global circulation of the atmosphere and the ocean. The climate of the Arctic is subject to visible changes and the sea-ice albedo feedback mechanism acts as an amplifier of climate change. The observed decrease of Arctic summer sea ice cover over the last decades is best viewed as a combination of strong natural variability due to large-scale dynamics [...] aerosols in the Arctic and its role for climate change. Processes in polar regions, connected with a variety of feedbacks, including cloud-, aerosol-,

fog, calm sea, ice free. Nothing reminds us that we are in the Arctic Ocean (but this may change soon when are steaming northwards end of this week!).

daily temperature measurements at our research stations in the Arctic and Antarctic, monitoring ocean currents at our deep-sea moorings in the Fram Strait and the Weddell Sea, and the data from our sea-ice buoys drifting through the Antarctic and Arctic Oceans, as well as the data supplied by various satellites, without which modern climate research would be practically impossible. Whether for the ocean, ice, atmosphere or land: our efforts provide reliable data that is absolutely essential for the validation of our climate models

air-sea ice-ocean interaction. The improved representation of Arctic atmospheric processes in climate models is therefore a fundamental contribution [...] impact of the improved physical representation of polar air-sea ice-ocean interaction on the variability and changes of Arctic atmospheric circulation, Arctic sea ice and mid-latitude atmospheric circulation [...] of extreme events on navigability of Northern sea route over the Arctic Ocean, wildfires and changes in vegetation characteristics over Russia. Milestone M4.1 Implementation of improved ocean wave-ice