O values in ice and water samples from the Arctic and Antarctic, as well as the δ 13 C values of dissolved inorganic carbon in the water of the polar oceans. In addition, our laboratories offer the possibility [...] input) and changes in the supply of nutrient silicon and its use in polar and subpolar ocean regions (e.g. Southern Ocean, North Pacific) can be reconstructed on geological time scales. For the measurements [...] Clumped isotopes δ 13 C + δ 18 O (biog. carbonate, foraminifers) Option: clumped isotopes Changes in ocean circulation, nutrient content and deep water ventilation (δ 13 C) Hydrographic changes (δ 18 O, Δ47)

Purser • AWI Science Award, 2023, Dr. Cara Nissen Diverse Grants und Projekte • ERC Starting Grant OceanPeak (Hauck), www.awi.de/ueber-uns/service/presse/presse- detailansicht/default-c1f8a44c21-1 [...] ): Year-round Ecosystem Study on Svalbard: Seasonally resolving ecosystem functioning in a warming Arctic www.fona.de/de/yesss-neues- forschungsprojekt-untersucht-ganzjaehrig-erwaermung-in-der-arktis

provide answers to big questions on polar and global climate change. Future climate change in the Arctic and Antarctic depends on feedbacks governed by small-scale processes: How do the surface fluxes of [...] momentum and particles change as the atmosphere becomes less stable, and as sea ice gives way to open ocean? How do clouds and precipitation change in response to changes in temperature, moisture, circulation

station. Antarctic To be filled! Text is missing Arctic Ocean (Central Arctic) FS Polarstern MOSAiC (Photo: M. Gutsche) The polar oceans in the Arctic and around Antarctica, characterized by their seasonal [...] expedition The Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) was a major year-long campaign in the Central Arctic Sea ice, using the research icebreaker Polarstern . MOSAiC was [...] 400 scientists and experts from 20 nations, who studied a full annual cycle of the Arctic Atmosphere, Sea ice, Ocean, Biogeochemistry and Ecosystem. Further information and scientific publications can

the Arctic lost its white landscape and had a blue, ice-free ocean. Alexander Haumann , ERC Starting Grant VERTEXSO , January 2023 - Dcember 2027. VERTEXSO (VERTical EXchange in the Southern Ocean) studies [...] future. Ocean tracers serve as a fingerprint of the impact of rapidly melting ice masses on the ocean’s salinity and will be used to constrain a climate model. Lettie Roach , since 2024. SouthernOcean and [...] also involved in this project. Into the Blue: Resolving Past Arctic Greenhouse Climates. What are the global impacts of an ice- free Arctic? Taking a look into time periods warmer-than-present (i.e. P

improve the understanding of polar atmospheric processes and their interactions with sea ice and ocean in the global context. We combine long term observations from ground stations and innovative measurements [...] improving the representation of polar processes in regional to global scale climate models. We run the Arctic research station AWIPEV on Svalbard and the meteorological and atmospheric observatory at the Antarctic

reflect in detail processes in the ocean, which have a major influence on the climate. In response, the AWI has developed a special ocean model (FESOM), which simulates e.g. ocean currents and sea ice. For their [...] All around the world, there are natural climate archives – the sediments on the ocean floor, ancient ice in the Arctic and Antarctic, wood for tree-ring analyses, and more. These archives contain what [...] computer programmes used to simulate reality: the motion of air masses, radiation from the sun, and ocean currents – they’re all climate-relevant processes that, with the aid of mathematical formulas, can

Chart of the Oceans (GEBCO) , the International Bathymetric Chart of the Arctic Ocean (IBCAO) ,the International Bathymetric Chart of the Southern Ocean (IBCSO) , and the Southwest Indian Ocean Bathymetric [...] world’s oceans by 2030, and hosts the Seabed 2030 Southern Ocean Regional Center (SORC) . SORC’s and IBCSO’ s responsibility is to produce the best possible authoritative map of the Southern Ocean, the South [...] Global and regional bathymetric models IBSCO (International Bathymetric Chart of the Southern Ocean) (Graphic: Alfred-Wegener-Institut / IBSCO v2, Dorschel et al., 2022) IBSCO v2 Datenabdeckung (Graphic:

IODP/ICDP drill proposals. Formation of the Arctic Basin Polarstern for geophysics in the Arctic Ocean Research projects on the formation of the Arctic Ocean Development of the North Atlantic Deepwater [...] modification of oceanic crust, and modification of regional palaeo-circulation. Palaeo-topography and dynamic modifications of the seafloor strongly affect the pathways of the oceanic circulation and the [...] and its precursors? Follow this link Gateways of the Southern Ocean What was the effect of the opening of the gateways of the Southern Ocean? Lakes as climate archives Old lake-level terraces at the current

provide information on past ice sheet dynamics. Ice sheet scours on the Lomonossov Ridge in the Arctic Ocean Madiba Sea Mount, south of South Africa, discovered 2013 with RV Polarstern Current-induced seabed