Eberhard.Sauter@awi.de
+49(471)4831-1517
Bussestraße 27, 27570 Bremerhaven

Clara.Hoppe@awi.de
+49(471)4831-2096
Am Handelshafen 12, 27570 Bremerhaven

Christian.Haas@awi.de
+49(471)4831-2285
Klußmannstraße 3d, 27570 Bremerhaven

Anneli.Strobel@awi.de
+49(471)4831-1479
Am Handelshafen 12, 27570 Bremerhaven

Andreas.Herber@awi.de
+49(471)4831-1489
Klußmannstraße 3d, 27570 Bremerhaven

factors such as warming, nutrient deficiency or ocean acidification, by focusing on one of the most sensitive areas on Earth, the subarctic and Arctic Ocean. Thereby, we contribute to the Helmholtz research [...] greenhouse gas, rising CO 2 causes ocean warming: temperatures of the surface waters have already increased by 1.1°C on average, while some regions like the Arctic Ocean changing fastest (IPCC 2022). The [...] anthropogenic CO 2 is taken up by the ocean, concentrations of CO2 and bicarbonate increase while the concentration of carbonate ions and the pH decrease, also known as 'Ocean Acidification'. Just like warming

nutrients and carbonate chemistry parameters in the Fram Strait and the Central Arctic Ocean. To monitor such parameters in the ocean, it is common practice to analyze discrete water samples obtained e.g. by [...] productivity, strength of the biological carbon pump) are linked in the present-day and future Arctic ocean, as well as to which extent this relationship is driven by differences between functional groups [...] and where nutrients and CO 2 are distributed in the ocean, which has implications for primary and bacterial production and CO 2 uptake by the ocean. In order to understand how such biogeochemical cycles

you have a window into ocean temperature at a moment in the past. Another example is the isotopic composition of boron, which reflects the pH of ancient seawater – a measure of ocean acidity that is closely [...] process by which warmer, saltier water masses from the Atlantic are pushing further north into the Arctic Ocean through the Fram Strait. This is a recent and ongoing phenomenon, and understanding its pace and [...] reconstruct those past episodes – how fast things changed, what forces drove them, how ice sheets and oceans responded – we would gain something invaluable: a longer perspective on what is possible. But how

Eurasian Basin of the Arctic Ocean using Imaging Flow Cytometry and PDMPO Judith Matz, M.Sc. Thesis title: Investigation of new and regenerated primary production during summer in Arctic Fjords using 13C and [...] Research Tatiana M. Torres (Photo: Gine Maccanti) Tatiana M. Torres, J.D./D.C.L/M.Sc. Project Manager of Ocean Gardens Technicians Erika Allhusen Lorenz Eckardt (Photo: Lorenz Eckardt) Lorenz Eckardt lorenzjohann [...] Antonia Thielecke, M.Sc. Antonia Thielecke (Photo: Ruben Schulte-Hillen) Thesis Title: Response of Arctic phytoplankton to declining silicic acid Project: SiDe-EFFECT Katharina (Katha) Paetz, M.Sc. Katha

marine biogeochemical model REcoM. When embedded into a large-scale ocean circulation model, we can project the future of the oceanic carbon sink, the conditions for marine life, and put a specific focus [...] preserved in biological archives such as foraminiferal shells or Arctic coralline algae, the group works to recover information about past ocean and climate conditions. In close collaboration with palaeoclimate [...] the three principal AWI divisions: Bio, Geo and Climate. Phytoplankton Ecophysiology Proxy Research Ocean Biogeochemical Modelling