insights into key local-regional scale physical and chemical processes for atmosphere-ocean-ice interactions in the Arctic and Antarctic, their responses to, and influence on, projected changes in the global [...] Rinke . WP4. Arctic processes and O-A-I interactions in the coupled climate system Improved understanding of those key physical and chemical processes in the atmosphere, sea ice and ocean, and involved [...] involved interactions that play a major role in the coupled Arctic climate system and associated Arctic Amplification. AWI contribution led by Dr. Annette Rinke and Dr. Wolfgang Dorn . WP5. Antarctic processes

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

degrees Celsius. The polar 6 research aircraft of the Alfred Wegener Institute flies over the Arctic Ocean during an IceBird sea ice thickness campagne. (Photo: Esther Horvath) AWI researchers use the [...] the Earth’s crust, ice- and snow-covered areas, oceans and the atmosphere. Several times a year, Polar 5 and Polar 6 fly weeks-long expeditions in the Arctic and Antarctic. They carry on board a diverse range [...] Alfred Wegener Institute’s research is conducted in the inaccessible, ice-covered regions of the Arctic and Antarctic, making research aircraft indispensable. Currently the AWI relies on the research planes

Siberian river systems into the central Arctic and the North Atlantic. This material affects Arctic biogeochemistry and ecosystems, while the fresh water itself alters ocean circulation. The Alfred Wegener Institute [...] suspended matter from the Siberian shelves across the central Arctic towards the Fram Strait channel, which connects to the Nordic Seas. This cross-Arctic flow influences the delivery of both natural substances [...] known as the Transpolar Draft, operates. It also uncovers the various factors controlling this major Arctic surface current, including warmer temperatures which could increase the spread of human-made pollutants

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 [...] 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 [...] anthropogenic 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

Observations in the Arctic Ocean The Arctic is an environment where global climate change is strongly manifested. The Arctic Amplification, represented by the atmospheric warming trend in the Arctic being about [...] deep oceans. We explore the importance of physical processes in the Arctic and Antarctic Oceans for a changing climate and the polar ecosystems. Polarstern in der Arktis / Polarstern in the Arctic Contact [...] Hoppmann @ awi.de Our Team Main research topics of our group Physical Oceanography of the Arctic Ocean The Arctic Ocean and the Nordic Seas are integral parts of the Atlantic meridional overturning circulation

under the snow and ice cover of the Arctic Ocean. The results of the study now published in the journal Nature Communications show that photosynthesis in the ocean is possible under much lower light conditions [...] low light levels. This is the result of an international study that investigated the development of Arctic microalgae at the end of the polar night. The measurements were carried out as part of the MOSAiC

the Canadian Arctic” is a project of the research group PermaRisk , which is led by Moritz Langer , and was published in 2020. Digital stories invite you to travel to the Canadian Arctic. Visual impressions [...] system. The background is the IPCC Special Report on Oceans and Cryosphere (SROCC) , which was published in 2019. Hugues Lantuit: Collapsing Arctic coastlines | Horizons 2019 Presentation This presentation [...] these four pages. Julia Boike, Alfred Wegener Institute, Permafrost, Arctic Circle 2015 Presentation This presentation was held at the Arctic Circle Conference in October 2015. Julia Boike talks about the

With our model we investigate interactions between permafrost, vegetation, snow, lakes, and the Arctic ocean. Furthermore, we use our models to gain insights into important ecosystem functions such as the [...] climatic conditions. The models allow us to investigate impactsof past and future climate changes in the Arctic. Since permafrost is usually not visible at the earth’s surface and only few measurement sites exist [...] current state of permafrost. Furthermore, permafrost models give us insights into the evolution of Arctic landscapes and help us understand how these unique ecosystems respond to natural and human-caused

of a permafrost landscape How do you imagine an Arctic landscape characterized by permafrost? The answer is visualized by a 3-dimensional print of an Arctic landscape in Northeast Siberia, the Bykovsky Peninsula [...] ‘before-and-after’ lenticular images, together with video and audio recordings from expeditions to the Arctic, will help illustrate the thawing of the permafrost, and the fieldwork involved in investigating [...] ice melts on slopes. As a result, sediments and plant remains are transported into rivers and the ocean, thereby changing the biochemistry of the water. The data were collected by Gonçalo Vieira und Pedro