Investigators Group “Southern Ocean & Antarctic Sea ice Evolution (SO-ASE)” is looking into the unexpected changes that have been seen in Antarctic sea ice over the last few decades and the need to reduce [...] Ecosystem – is to assess the consequences of the decline in silicic acid concentration in the inflow of North Atlantic water into the Eurasian Arctic for the Arctic marine ecosystem using an ecosystem biology [...] climate change Link to project webpage ARJEL To better understand the role of jellyfish in Arctic seas, the Helmholtz Young Investigators Group ARJEL (ARctic JELlifish) will combine the latest technologies

located between the sea ice and the warm Atlantic Water and insulates the sea ice from the heat below. As long as interior mixing processes are weak, this vertical structure persists and the sea ice is protected [...] heat around the globe. In the Arctic, the role of internal waves is less clear. This far north and under a strong sea ice cover, only few internal waves are generated. Due to global warming, however, the [...] continues to drive sea ice decline, internal wave generation and mixing could increase such that enough heat from the Atlantic Water is fluxed toward the surface that even more sea ice melts. Schematic

Impact of sea ice decline and changing silicic acid availability on Central Arctic primary productivity Antonia Thielecke1, Jeffrey Krause2, Natasha Bryan1, Lena Eggers1, Mar Fernández-Méndez1 1Alfred [...] 1Alfred Wegener Institute, Germany; 2Dauphin Island Sea Lab, USA Antonia.thielecke@awi.de References 1 Hátún, H., Azetsu-Scott, K., Somavilla, R., Rey, F., Johnson, C., Mathis, M., Mikolajewicz, U., Coupel, P [...] S.V., Salter, I., Ólafsson, J., 2017. The subpolar gyre regulates silicate concentrations in the North Atlantic. Sci Rep 7, 14576. doi.org/10.1038/s41598-017-14837-4 2 Orkney, A., Platt, T., N

and nutrient supply shape primary producers and stoichiometry in the Humboldt upwelling system Deep Sea Research Part II: Topical Studies in Oceanography 2025-09 | Journal article DOI: 10.1016/j.dsr2.2025 [...] Methylphosphonate-driven methane formation and its link to primary production in the oligotrophic North Atlantic - N. von Arx, J. - 2023- Nature Communications 2022 Mar Fernández-Méndez (0000-0002-4968-1156)

designs will then be implemented in large-scale field trials, with floating cages deployed in the North Sea and fixed barriers in Gran Canaria. Across both sites, we will monitor biomass production, carbon [...] Jan Jacob, M.Sc. PhD Canditate Jan Jacob (Photo: Jan Jacob) Dissertation Title: FROM LAB TO SEA: Exploring Ulva Reproduction and Growth-Dynamics for Open-Water Aquaculture on Gran Canaria Master Thesis

biodegradable floating meshes, and automated seeding—the project aims to upscale Ulva production in the North Sea and Gran Canaria. These techniques support a circular blue bioeconomy by transforming harvested

hydrography of the North Atlantic, in particular by analyzing the impact of oceanic resolution in key regions, such as the Gulf Stream and North Atlantic Current regions, the Labrador Sea, and the Denmark [...] Goessling | Özgür Gürses | Thomas Rackow | Dmitry Sidorenko SPP 1889 Regional Sea Level Change and Society Understanding regional sea level change and its impacts on societies requires new forms of integrated [...] research between natural and social sciences. The Priority Program (SPP-1889) "Regional Sea Level Change and Society (SeaLevel)" , funded by the German Research Foundation (Deutsche Forschungsgemeinschaft,

Extreme sea surface temperatures in 2023 resulted in high CO₂ outgassing, particularly in the North Atlantic, meaning that the global ocean absorbed less CO₂ overall. Thanks to El Niño, much less CO₂ than [...] than usual escaped into the atmosphere in the eastern Pacific, but the outgassing in the North Atlantic negated the positive effect. The fact that the ocean did not lose even more CO₂ is due to physical

wetting/drying option. Recent applications • Tidally induced transport and Lagrangian tracking in the North Sea Fig. Clouds of the tracers, resulting from backtracking for 3 weeks superimposed on a bathymetry [...] V. Sidorenko, A. Androsov, K. H. Wiltshire • Sylt-Rømø Bight under sea level rise pressure Fig. Change in the tidal zone, various sea level rise scenarios. Authors: G.Konyssova, V. Sidorneko, A. Androsov [...] Androsov, S. Rubinetti, L.Sander, K.H.Wiltshire • Venice lagoon, sea level rise and Acqua alta events Animation. Modeled Acqua alta events in the Venice lagoon. Authors: S. Rubinetti, I. Kuznetsov, V. Sidorenko

Bremerhaven – Bremerhaven Find out more Uthörn II – North Sea Wrecks 16. May 2022 – 20. May 2022, Bremerhaven – Bremerhaven Find out more Uthörn I – North Sea Wrecks 28. June 2021. – 02. July 2021, Bremerhaven [...] Bremerhaven – Bremerhaven Find out more HE584 – North Sea Wrecks II 17. – 22. September 2021, Bremerhaven – Bremerhaven Find out more HE573 – North Sea Wrecks I 06 – 11. April 2021, Bremerhaven – Bremerhaven [...] RV Heincke Sediment sampling Side Scan SMS Mainz HE573 – North Sea Wrecks I 06 – 11. April 2021, Bremerhaven – Bremerhaven The North Sea Wrecks project aims to develop and implement a common approach for