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.2014.10.001 Schlindwein and Schmid, 2016: Mid-ocean-ridge seismicity [...] 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 a trans-tensional margin [...] , 2016: Thickness of the oceanic crust, the lithosphere, and the mantle transition zone in the vicinity of the Tristan da Cunha hot spot estimated from ocean-bottom and ocean-island seismometer receiver

1126/science.adp3491 Gou, R., K. Wolf, C. Hoppe, L. Wu, G. Lohmann, 2025: The changing nature of future Arctic marine heatwaves and its potential impacts on the ecosystem. Nature Climate Change, doi.org/10 [...] Lohmann G, Boers N, Daniau AL, Oliveira RS, Campos MC, Shi X, De Oliveira PE, 2014: Slowdown of ocean circulation increases the vulnerability of northern Amazon forests. Nature Geoscience 2024. DOI: 10 [...] and M. Kucera, 2023: Plankton biogeography shows strong meridional variation in ice age to modern ocean warming. Nat. Geosci., DOI:10.1038/s41561-023-01328-7 2022 Pontes, G., A. Taschetto, A. Sen Gupta

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

ARCGATE The Arctic boundary has been observed over many years to better understand and monitor the exchanges between the Arctic Ocean and its neighboring oceans. The unique geometry of the Arctic—surrounded [...] Polarstern set sail from Tromsø to drift in the Arctic Ocean for a year—trapped in the ice. The goal of the MOSAiC expedition was to study the Arctic, the epicenter of global warming, more closely than… [...] Since the early 20th century hydrographic measurements have been carried out in the Arctic Ocean. Although today the Arctic is a hotspot of climate change, data sampling is still sparse due to the large sea

diversity of the entire plankton community of the Fram Strait (Arctic) is assessed. This data is then applied to forecast future scenarios of Arctic planktonic biodiversity. Recommendations to policy and indicator [...] labs located along the German Baltic Sea. The overall objective is to develop a smart and flexible ocean observation strategy tailored to the specific observation needs of individual stakeholder groups.

Thorium in the Arctic Ocean The Transarc expeditions together with earlier Polarstern campaigns have yielded a unique time series of the chemical and physical properties of the Central Arctic Ocean (CAO). Only [...] anthropogenic carbon is taken up by the ocean, and glacial ocean carbon storage in the deep Southern Ocean is well established ( Brovkin et al., 2012 ). Changes in Southern Ocean carbon uptake and its export to [...] of mud EXC 2077: The Ocean Floor – Earth’s Uncharted Interface The ocean floor, which makes up 71% of the Earth’s solid surface, lies an average of 3,700 meters beneath the ocean surface. The difficulties

and Risks BMBF nuArctic: Towards a better understanding of the nutrient cycles in the ‘new’ Arctic Ocean and implications for future primary productivity and carbon export OceanICU : OceanICU is a Horizon [...] produce new data, information and understanding on the role of the Ocean in the global carbon cycle. ERC OceanPeak: The global ocean carbon cycle after peak emissions: Dynamics and process attribution [...] future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points Horizon 2020: OceanNETs :

degradation and impacts of contaminants of emerging concern (CECs) in the oceans through case studies in the Atlantic, the Arctic and the Mediterranean. It is developing new methods for assessing the impact [...] tipping points and impacts on the functioning of local ecosystems and services. Disko Bay and the Arctic Station, Qeqertarsuaq, Disko Bay, Greenland (Photo: Uwe John) Funded by: Federal Ministry of Education [...] functional adaptations of LOV-domain blue light photoreceptors in Antarctic versus temperate and Arctic diatoms. The project is carried out in cooperation with the AG Kroth, University of Konstanz . Antarctic

Schepper What are the global impacts of an ice-free Arctic? How will the Arctic develop with increasing climate warming? What does an ice-free Arctic mean for our environment and our society? Researchers [...] surface uplift of the Andes, but also by changes in the oceanic circulation of the adjacent Pacific Ocean. The timing, forcings, and feedbacks of land-ocean coupling and their impact on the past hydroclimate [...] feedback mechanisms in the Arctic affect the phase shift of Arctic surface temperature. The function of each feedback will be quantified for understanding the physical processes of Arctic amplification underlying

Sea-ice algae The seasonal extent and properties of Arctic ice on land and in the ocean determine the efficacy of the albedo feedback mechanism causing arctic climate amplification. Various ice types are inhabited [...] Sampling and analytical strategy to investigate taxonomic and functional ice algae composition in the ocean and lakes. (Photo: Alfred-Wegener-Institut) High-resolution reconstruction of regional climate changes [...] Interdisciplinary research projects at the interface between natural science and data science Topic A: "Arctic Environmental Data Analytics"– Gregor Pfalz Topic B: "Data fusion using remote sensing data and