Young Investigator Group Silicic acid Decline Effect on Marine Arctic Ecosystems SideEFFECT (Graphic: Mar Fernández-Méndez) Human-induced climate change is altering the ocean on a previously unimaginable [...] Arctic Ocean in recent decades. This will affect the carbon uptake capacity of primary producers and the composition of their communities [...] is to understand the consequences of silica decline for the Arctic marine ecosystem and the mechanisms responsible. To understand how climate change affects the Arctic Ocean, we will combine novel

are being built up. Data assimilation into coupled ecosystem- ocean-ice models will enable the identification of phytoplankton variability and trends of surface-ocean processes and their bio-physical [...] interaction of physical and biogeochemical processes within the Arctic Ocean, as well as how these are linked to the Atlantic Ocean. AWI scientists are developing the world’s first multi- resolution [...] important coupled sea ice-ocean processes that determine the Arctic- Atlantic interplay in the Fram Strait region using dynamic mesh-sizes of 5 km or smaller.

set sail from Tromsø, Norway, embarking on an expedition to the Arctic Ocean. Over the next two months, an international research team will analyse the feedback effects between global warming and sea ice retreat in the Arctic Ocean. The investigations will focus on the differences in the melting of various sea ice types – representing the Arctic of the

Brochures and Reports Fact sheet Svalbard Germany in Arctic research The collaborative framework of AWI’s Antarctic research Marine Protected Area in the Weddell Sea Arctic Council Shipping in the Arctic Arctic and Antarctic – more differences than similarities? Arctic Governance Tourismus in Polar Regions EU Engagement in the Arctic [...] in the Polar Regions Knowledge on fish and their ecology in the Arctic Ocean The Greenland Ice

M. B. (2025) Transparent Exopolymer Particles in the Surface Arctic Ocean by Ocean Biogeochemistry Modeling. Department of Physics and Engineering, University Bremen, Bremen, Germany, Bremen, 160 p. [...] Machine Learning Based Monitoring of Phytoplankton Groups in the Arctic Ocean . Department of Physics and Engineering, University Bremen, Bremen, Germany, Bremen, 12 Sep 2024 Di Bella D. (2024) Calculation [...] , V. (2021) Loading of coloured dissolved organic matter in the Arctic Mediterranean Sea and its effects on the ocean heat budget, Ph.D. thesis, University of Bremen, DOI: 10.26092/elib/646. 2016

Sea ice Application of satellite data Arctic Ocean IceBird For the past several years, the sea ice in the Arctic has melted more and more intensively during the summer months. [...] we at AWI are exploring the thickness and surface conditions of Arctic sea ice. We measure both properties in several key regions of the Arctic Ocean with autonomous buoys, on helicopter and aircraft [...] of the most important reference data set on the development of Arctic sea-ice cover worldwide. Those surveys indicate that the thickness of sea ice leaving the Arctic Ocean towards the North Atlantic

system, we can obtain “analysis fields”, which are a set of ocean and sea ice variables optimally combining observations and a model. The analysis fields are applied for a variety of ocean and sea ice studies in the Arctic Ocean, and also provide initial conditions for future projection experiments (e.g., sea ice outlook).We have been developed data [...] currently used to synthesize model results and observed data in the Arctic Ocean. The systems have been successfully applied to North Atlantic/Arctic Ocean Sea Ice Model (NAOSIM) developed at the Alfred

Arctic Ocean
On the seafloor of the shallow coastal regions north of Siberia, microorganisms produce methane when they break down plant [...] , the gas can be transported thousands of kilometres across the Arctic Ocean and released in a completely different region months later. This phenomenon is the subject of an article by researchers from [...] Scientific Reports. Although this interaction between methane, ocean and ice has a significant influence on climate change, to date it has not been reflected in climate models.

current long-term observations Atlantic Water is the main oceanic source of heat, salt, and nutrients of the Arctic Ocean. It enters the Arctic Ocean through the Barents Sea or Fram Strait. In the [...] Strait on timescales of several months while the rest enters the Arctic Ocean and follows a cyclonic circulation for years to decades. The AWI long-term observations in Fram Strait have been measuring [...] events occurred in fall 2006 and in late winter 2012. In the deep ocean, it was also observed that the two water masses present there (the warmer Eurasian Basin Deep Water and the colder Greenland Sea

Sea Ice Broad expanses of the Arctic Ocean and the Southern Ocean in the Antarctic are covered in sea ice. The ice plays a vital role in our climate system and is an [...] when seawater freezes; this most frequently takes place in the Arctic and Antarctic. Depending on the season, the ice covers greater or lesser parts of the ocean. In the Northern Hemisphere, the ocean [...] the Arctic Ocean and the atmosphere, the ice is melting earlier in spring and freezing later in autumn. In September 2012, the Arctic sea-ice