ankton, Karakuş et al., 2022 ), and to include the sensitivity of phytoplankton growth to ocean acidification ( Seifert et al., 2022 ). Main REcoM references (chronological order): •[3 phytoplankton functional [...] M., Hagen, W., Hauck, J., 2022. The Role of Zooplankton Grazing and Nutrient Recycling for Global Ocean Biogeochemistry and Phytoplankton Phenology. JGR Biogeosciences 127. doi.org/10.1029/2022JG006798 [...] Resplandy, L., Rödenbeck, C., Schwinger, J., Séférian, R., 2020. Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget. Front. Mar. Sci. 7, 571720. doi.org/10

Over the past 200 years, our planet’s oceans have absorbed more than a quarter of all anthropogenic carbon dioxide from the atmosphere. As a result, their acidity has increased by nearly 30 percent their [...] recently demonstrated. If this comes to pass, it could have far-reaching consequences for life in the ocean, as they report in the journal Nature.

Ocean acidification
A new study in the prestigious journal Science Advances shows that stress from rising water temperatures reduces ability of corals to adapt to ocean acidification.

of Southern Ocean phytoplankton to global change, in particular to ocean acidification. The availability of trace metals and light are considered key factors in controlling Southern Ocean phytoplankton [...] Polarstern expedition ANT XXVII-2. Picture: S. Trimborn (Photo: Alfred-Wegener-Institut) Southern Ocean phytoplankton are major drivers of global carbon cycling accounting for 20% of the global annual primary [...] information is available on how these environmental factors (trace metals, CO2, light) affect Southern Ocean phytoplankton. In particular research on interactive effects of these factors is still missing. The

CO2 concentration and pH in the present Southern Ocean. Phytoplankton ecology in the present Southern Ocean. Southern Ocean phytoplankton are major drivers of global carbon cycling accounting for ~2 Pg [...] strongly governs Southern Ocean phytoplankton productivity. CO2 concentration and pH in the future Southern Ocean. Figure: S. Trimborn Phytoplankton ecology in the future Southern Ocean. Climate models indicate [...] Fe-limited oceanic waters Inorganics in organics: Chemical and biological controls on micronutrient and carbon fluxes in the polar ocean Iron limitation and cycling in contrasting Southern Ocean Provinces

global change will impact the Southern Ocean ecosystem. The availability of trace metals, in particular iron, is considered the key factor in controlling Southern Ocean phytoplankton productivity and community [...] CO2 has already caused significantly higher aquatic CO2 concentrations and lower pH values (‘ocean acidification’) compared to pre-industrial times potentially affecting plankton community structure as well [...] contrasting water masses from the Southern Ocean; namely the naturally iron-enriched waters of the Antarctic Peninsula and the South Orkney Islands and two open ocean sites of the iron-limited waters of the

in the polar ocean View from Rpthera Point, Western Antarctic Peninsula. Photo: S. Trimborn (Photo: Alfred-Wegener-Institut) In vast areas of the ocean, particularly in the Southern Ocean, marine primary [...] of marine ligands, their chemical structures and turnover pathways are essentially unknown. Ocean acidification, increased glacial melting and changes in aerosol deposition are likely to impact concentration [...] micronutrients in seawater and will focus on biological production and degradation of ligands in polar oceans, their molecular composition, chemical properties and responses to changing environmental conditions

in a changing Southern Ocean In large areas of the worlds oceans iron (Fe) limits primary production thus affecting the global carbon cycle. One such area is the Southern Ocean (SO). In addition to Fe [...] primary production with iron in the Southern Ocean. We will also address the question how Zn/Co/B12 co-limitation with iron is modulated by ocean acidification. To confirm Zn/Co/B12-limitation or co-limitation [...] trace metals and explore how these relationship may change with increasing CO2 and resulting ocean acidification. This multifaceted approach between laboratory experiments and field studies will shed light

atmosphere - sea-ice - ocean system; to study the history of the transpolar system. Contact: T. Soltwedel, J. Hölemann, R. Stein BIOACID III (Biological Impacts of Ocean ACIDification) Project funded by the [...] GEOMAR, Germany The overarching questions of BIOACID -Project are: What are the effects of ocean acidification on marine organisms and their habitats? What are the underlying mechanisms of responses and [...] GEOMAR, Germany Objectives of the TRANSDRIFT -Project are: to assess the influence of sea-ice and ocean dynamics in the Laptev Sea on the transpolar drift; to investigate changes in the arctic halocline

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