Waterway, Coastal and Nature Conservation O2A Observation to Archive OBH Ocean Bottom Hydrophones OBS Ocean Bottom Seismometers ODP Ocean Discovery Program OECD Organisation for Economic Co-operation and D [...] Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project PAMIP Polar Amplification Model Intercomparison PANABIO PAN-Arctic Information System on Arctic Biota PANGAEA Data Publisher [...] le SMOS ESA satellite mission to monitor Soil Moisture and Ocean Salinity SO Southern Ocean SOA Secondary Organic Aerosol SOCAT Surface Ocean CO2 Atlas SOLUTIONS SOLUTIONS for present and future emerging

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

sea-ice cover on the Arctic Ocean in summer, to higher water and air temperatures, and to rising sea levels. Less sea ice means e.g. that winds produce larger waves, which batter Arctic coasts. On average [...] further thawing be prevented? To FAQ element Can permafrost only be found on land? Since the ocean floor in the Arctic is insulated by water and sea ice, one might assume there was no permafrost there. But guess [...] latitudes of the Arctic and Antarctic, a minor rise is enough to set off thawing. To FAQ element Why are permafrost coasts increasingly collapsing? Coastal erosion has worsened in the Arctic over the past

proxies TEXH86 and UK’37 Long-term winter warming trend in the Siberian Arctic during the mid- to late Holocene Back from Antarctica Ocean surface temperature variability: Large model–data differences at decadal [...] profiles Flat Meridional Temperature Gradient in the Early Eocene in the Subsurface Rather than Surface Ocean Layering of surface snow and firn at Kohnen Station, Antarctica - noise or seasonal signal? Assessing