IPCC Climate Change Ocean acidification Anthropogenic climate change is altering the living conditions in the ocean more dramatically than in the past 50 to 300 million years. The oceans are becoming warmer [...] which chemically react with constituents of seawater, making the oceans more acidic. But that’s not all: for various reasons, warming oceans store less oxygen. In other words, they gradually lose their lifeblood [...] in the seas simultaneously reduces the number of safe havens remaining to them. Increasing ocean acidification puts organisms under additional pressure. Further, these three climate impacts are mutually

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

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

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

CO 2 . A smaller ocean carbon sink can also be the outcome when climate changes affect major ocean currents, or when, due to changes in the marine environment (warming, acidification, nutrient and light [...] warming ocean simply can’t absorb as much as a cold one. In addition, the constant absorption of carbon dioxide affects the chemical balance of seawater. This phenomenon, referred to as ocean acidification [...] environmental scientist Dr. Judith, jpg | 14 MB Media Dialogue & Lectures Lectures | 06.11.2019 #Oceans4future? The ocean in the Global Carbon Budget Helmholtz Horizons Policy advice since 2018 Global Carbon Budget

biologist and scientific director of the IPCC Working Group II Technical Support Unit. IPCC Ocean acidification At regular intervals, the International Panel on Climate Change is faced with a mammoth task

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

exactly the pain threshold regarding envi- ronmental changes is for large marine algae. How much ocean acidification can a species tolerate? How well can it cope with rising water tempera- tures? How much do [...] but with an increased supply of carbon dioxide (CO2) at the same time, as in the case of ocean acidification, this can be compensated.” The biologist is now examining how sensitive the kelp forests are [...] can only be examined on site but under water. For this we need the skills of ocean scientific divers combined with an ocean scientist. Anyone who wants to get up really examine the medium and its underwater

2012, she received her PhD. from the University of Bremen for investigating the impacts of ocean acidification on marine macroalgae. After finishing her PhD, she participated in two diving expeditions to

lower temperature will lead to reduced performance while ocean acidification may be negligible most studies found no effect of ocean acidification on cold- water corals; though less abundant in areas 1 T: [...] farms Co-PI: Marlene Wall, Claudio Richter, Ute Hentschel ©U. Pörschmann ST 6.4 Use and misuse of the ocean: Consequences for marine ecosystems Lozano-Muñoz et al. 2021 An integrated holobiont view on cold-water