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

have 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 [...] deepest point. Its only deep-sea connection to other oceans lies in Fram Strait between Greenland and Svalbard. The Arctic Ocean is also characterised by record low temperatures: directly [...] differences that will most likely mean more dramatic impacts in the Arctic than in the Deep South.The Arctic Ocean stretches from 75 degrees N to the North Pole, while the ice-covered Southern Ocean only

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 [...] conditions produced by climate change. Find out more Ice Climate Sea Arctic Antarctic Sea Ice Broad expanses of the Arctic Ocean and the Southern Ocean in the Antarctic are covered in sea ice. The ice plays [...] benefiting from the developments. Find out more Sea Climate Arctic Antarctic North Sea Ocean Acidification Our planet’s oceans absorb tremendous amounts of carbon dioxide. Instead of causing atmospheric

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.” Unique observations in an NMR [...] 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 too much oxygen – and are [...] more A view inside – a fish in the NMR Integrative Ecophysiology Ocean Acidification

are being 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 [...] interaction of physical 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 [...] important coupled sea ice-ocean processes that determine the Arctic- Atlantic interplay in the Fram Strait region using dynamic mesh-sizes of 5 km or smaller.

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 transmitted through ice & snow. [...] environmental 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 [...] 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 gel traps to differentiate

research ship Healy and the icebreaker Oden in the middle of the Arctic Ocean: at 85° 30 N and 015°00’ E over the Gakkel Ridge. Aerial view of RV Polarstern (Photo: Alfred-Wegener-Institut) Operations [...] research vessel Healy and the icebreaker Oden in the middle of the Arctic Ocean at 85° 30 N and 015°00‘ E over the Gakkel Ridge. 2004-2005 – In the framework of the ice station Polarstern experiment the [...] . 06.2012-10.2012 – 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

of an international study that investigated the development of Arctic microalgae at the end of the polar night. The measurements were carried out as part of the MOSAiC expedition at 88° northern latitude [...] in the microalgae's habitat under the snow and ice cover of the Arctic Ocean. The results of the study now published in the journal Nature Communications show that photosynthesis in the ocean is possible

10.1016/j.tecto.2017.02.012 Corela et al., 2023: The effect of deep ocean currents on ocean- bottom seismometers records, doi: 10.5194/nhess-23-1433-2023 Czuba et al., 2011: Continent-ocean-transition across [...] Logachev Seamount: Indicator for melt focusing at an ultraslow mid-ocean ridge?, doi: 10.1002/grl.50329 Schlindwein et al., 2014: Seismicity of the Arctic Mid-Ocean Ridge system, doi: 10.1016/j.polar [...] al., 2017: Magma plumbing system and seismicity of an active mid-ocean ridge volcano, doi: 10.1038/srep42949 Schweitzer et al., 2021: A 24‐Yr‐Long Seismic Bulletin for the European Arctic, doi: 10.1785

scales of phyoplankton activity (Graphic: Phytochange) Focus – The Arctic is warming faster than any other oceanic region of the planet and its sea-ice cover is declining faster than models predict. Due to [...] in sea-ice cover and stratification, the productivity in the Arctic Ocean may transition from being predominantly light-controlled to being more nutrient-controlled. Also, the phenomenon of ocean [...] observatory 'Hausgarten' in the Fram Strait, which connects the Arctic and the Atlantic Ocean. Different from the shallow Aleutian connection to the Pacific, this connection is 5569 meters deep, making