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

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

PowerPoint Presentation Ocean and climate change Dr. Rebecca Rolph Alfred Wegener Institute for Polar and Marine Research Potsdam, Germany • How the ocean regulates climate • Changes in the ocean • What these changes [...] more acidic since industrial revolution How the ocean regulates climate Sea state Sea state and climate How Ocean Regulates Climate F. Drullion • Controls ocean/atmosphere exchange • Global cycles of energy [...] ESA How Ocean Regulates Climate IPCC told us we need to better understand sea state We have now added sea state to our Climate Change Initiative Changes in the ocean: temperature Global ocean has warmed

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

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.

to the impacts of climate change on ocean life, and from 2015 to 2017 worked on a major project funded by the federal govern- ment to investigate ocean acidification (BioAcid). When this project ended, [...] concerning the ecology and composition of communities living on the floor of the North Sea and Southern Ocean, conducted by the Comparative Ecosystem Research Section of the Alfred Wegener Institute (AWI) in

CO2 with the atmosphere, namely the ocean and the terrestrial biosphere. According to Levin et al. (2010: Figure 7) the largest net uptake of bomb 14C by the world oceans occurred in the 1970s and was about [...] the atmosphere and surface waters in the circum Antarctic ocean (Graven et al. 2012). While the difference between atmospheric and surface ocean Δ 14C-CO2 in the late 1980 and 1990s was still about 200– [...] conducted in both hemispheres, documenting the so-called nuclear “bomb spike” and its transfer into the oceans and the terrestrial biosphere, the two compartments permanently exchanging carbon with the atmosphere

already impacting the modern ocean. To recognize changes and predict the future ocean, ocean color (OC) remote sensing aims at quantifying and monitoring optically active oceanic constituents such as phytoplankton [...] 2.2 Ocean color remote sensing 2.2 Ocean color remote sensing Ocean color (OC) remote sensing (Mobley, 1994; Mobley et al., 2021) refers to the dis- cipline that infers information on the ocean from optical [...] c CO2 was taken up by the ocean (Friedlingstein et al., 2019). As a consequence, the ocean is warming, sea levels are rising, sea ice concentrations are declining, and ocean acidity is enhancing (IPCC

survivability of marine organisms. In this context, Pörtner and his team inves- tigate how ocean warming, ocean acidification and the increasing lack of oxygen are affecting vital biochemical processes in marine [...] years and is now one of the world’s leading experts on the impact of climate change on life in the ocean. His scientific career began in Münster and Düsseldorf, where he studied biology and wrote his di [...] Assessment Report. He was jointly responsible for the IPCC’s three special reports on 1.5 °C, Land and Ocean, and the Cryosphere, and served as Co-Chair of the IPCC’s afore- mentioned Working Group II for the

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.