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-,

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

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

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)

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

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

research focuses on the impacts of climate change on the Earth’s oceans and polar regions, especially in connection with Arctic amplification, as well as changes in the biological pump and marine microbial [...] MB Prof. Dr. Antje Boetius Director of Alfred, jpg | 1 MB Media Arctic Circle (Video) | 15.05.2024 Arctic Circle 2024 – Panel “Arctic Climate” Find out more > Konrad-Adenauer-Stiftung | 04.07.2024 Report [...] and Antje Boetius Tyler Prize Lecture | 08.04.2023 The changing arctic - Vortrag von Prof. Dr. Antje Boetius (AWI) Senckenberg Dialogue | 23.10.2020 MOSAiC – the largest Arctic expedition of our time

FRAM (Frontiers in Arctic marine Monitoring) HGF infrastructur programme Duration: 01.08.2014 - 31.07.2021 Coordination: Antje Boetius, AWI, Bremerhaven The FRAM Ocean Observing System will be installed in the gateway between the North Atlantic and the Central Arctic, representing a highly [...] für Luft- und Raumfahrt , DLR), the GEOMAR – Helmholtz Center for Ocean Research Kiel, the Karlsruhe Institute for Technology (KIT) and the AWI. Contact: F. Wenzhöfer

southward, where they absorb heat and moisture over the open ocean. This perspective explains two different types of atmospheric conditions observed in winter during Arctic expeditions like MOSAiC: [...] 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 [...] coordination of the station. Antarctic To be filled! Text is missing Arctic Ocean (Central Arctic) FS Polarstern MOSAiC (Photo: M. Gutsche) The polar oceans in the Arctic and around Antarctica, characterized

different species of the genus Alexandrium sp . FRAM (Frontiers in Arctic Marine Monitoring) The development of a standardized molecular observation strategy for marine eukaryotic microbes is tightly linked [...] monitor and understand how ongoing environmental changes affect Arctic marine prokaryotic and eukaryotic microbial communities and how these changes will alter their role in global element cycling. Within [...] investigates biogeochemical parameters in the water column of the Arctic Ocean on a regular basis to better understand the impact of a variable environment on ecological processes in the Arctic ocean. ICES