Polar and Marine Research, have discovered in a recent study that Ocean Acidification can negatively affect diatoms of the southern polar ocean. In laboratory experiments, they observed that diatoms under [...] deep ocean. Thus, the CO 2 is removed from the global carbon cycle for a couple of thousand years. Dr. Sebastian Rokitta has explored during the past three years how the advancing Ocean Acidification affects [...] Helmholtz-PhD Awards who have been awarded for the very first time this year. Consequences of Ocean Acidification for calcareous algae (Youtube, 17.4.2013) The calcareous microalga Emiliania huxlyei is distributed

atmosphere and ocean circulation that may affect the uptake of CO2 by the Southern Ocean. The ocean- shelf-ice interactions in a warming world, the release of freshwater and its impact on ocean circulation [...] carbon budgets. Climate change affecting marine ecosystems includes current trends of ocean warming and of ocean acidification due to CO2 accumulation rates 100 times higher than in glacial to interglacial periods [...] While the Southern Ocean plays an important role in the global climate system, it is vice versa likely affected by anthropogenic impacts such as global warming and ocean acidification. Complex physical

changes in biogeochemical and planktonic parameters due to fast temperature increase and acidification of the Arctic Ocean. Team Dr. Eva-Maria Nöthig (coordinator, phytoplankton ecology & particle flux) Prof

different habitats (e.g.: in the water column and on the bottom). Ocean warming, ocean acidification and decreasing oxygen in the world's oceans in the wake of rapid climate change pose a challenge to all life

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 [...] 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, also [...] 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

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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 on marine [...] communities as well as to develop next-generation sensors for in situ measurements and to conduct acidification experiments at the deep seafloor. In the frame of the „European Strategy Forum on Research In