Ocean Biogeochemical Modelling The biogeochemical modelling group aims at achieving an understanding of diverse feedbacks between [...] physiology (see Research ). We contribute to and coordinate the ocean carbon sink estimate in the Global Carbon Budget, particularly the ensemble of Global Ocean Biogeochemistry Models that includes [...] cycle and in the marine ecosystem, with a special interest in the Arctic and the Southern Oceans. Surface chloropyll a concentration in an eddy-resolving simulation (1 km horizontal resolution) in the Fram

Kara Seas could bind up to 3.6 million metric tons of CO 2 in the Arctic deep sea for millennia. In this region alone, a previously unknown transport route uses the biological carbon pump and ocean currents

Arctic Ocean
The dramatic loss of ice in the Arctic is influencing sea-ice transport across the Arctic Ocean. As experts from the Alfred [...] sea ice that forms in the shallow Russian marginal seas of the Arctic Ocean actually reaches the Central Arctic, where it joins the Transpolar Drift; the remaining 80 percent of the young ice melts [...] not only takes us one step closer to an ice-free summer in the Arctic; as the sea ice dwindles, the Arctic Ocean stands to lose an important means of transporting nutrients, algae and sediments. The

Main Research Topics Physical Oceanography of the Arctic Ocean The Arctic Ocean and the Nordic Seas are integral parts of the Atlantic meridional overturning circulation, and hence key [...] for the global climate. The perennial sea ice cover makes the Arctic Ocean distinct from subarctic oceans – the presence of… Find out more PhytoOptics Analytical bio-optical techniques are applied to [...] the attribution of… Find out more Long-term Observations in the Arctic Ocean The Arctic is an environment where global climate change is strongly manifested. The Arctic Amplification, represented by the

processes in the Arctic and Antarctic Oceans for a changing climate and the polar ecosystems. Polarstern in der Arktis / Polarstern in the Arctic Contact [...] 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, and hence key [...] for the global climate. The perennial sea ice cover makes the Arctic Ocean distinct from subarctic oceans – the presence of… Find out more Ocean Optics Analytical bio-optical techniques are applied to

area into the Eurasian shelf seas. Ocean waters with salinities below the average salinity of the Arctic Ocean also contribute positively to the fresh water balance of the Arctic Ocean. Such waters flow in from the Nordic Seas. An interchange of waters between the Arctic and the Nordic seas results in in seasaw [...] transport and the relationship between fresh water storage in the Arctic Ocean and release of fresh water to the Nordic Seas in export events. The large scale consequences of such events for the oceanic

Polar sea ice variability - Arctic Our ability to quantitatively reconstruct Arctic paleo-sea-ice distributions has been greatly improved by a novel biomarker approach [...] 25 , brassicasterol, and PIP 25 , derived from a recent study of Arctic Ocean surface sediments (Fig. 2; Xiao et al., 2015 ). During the last years, a large number of IP 25 /PIP 25 studies have been [...] the IP 25 approach as key proxy for the reconstruction of past Arctic Ocean sea-ice conditions, however, more ground-truth data related to the synthesis, diagenesis, and preservation of this biomarker

In the Arctic, the weather plays a key role in determining how much ice covers the ocean. One weather phenomenon that has a significant influence on this is Arctic cyclones: they cause unusually warm and stormy conditions, which typically lead to a significant loss of ice. These conditions last [...] consequences for the future of sea ice and, by extension, the Arctic coastline.

century hydrographic measurements have been carried out in the Arctic Ocean. Although today the Arctic is a hotspot of climate change, data sampling is still sparse due to the large sea ice cover. Yet [...] (471)4831-1856 Axel.Behrendt @ awi.de The „Unified Database for Arctic and Subarctic Hydrography“ (UDASH) is an attempt to gather all publicly available temperature and salinity data for the Arctic Ocean [...] the data will be used to create a gridded product and an updated Arctic Ocean climatology. This work was funded by the FRAM project: www.awi.de/en/expedition/observatories/ocean-fram.html Publication :

MOSAiC - Multidisciplinary drifting Observatory for the Study of Arctic Climate ). From fall 2019 to fall 2020, the German research icebreaker POLARSTERN drifted frozen through the Arctic Ocean. The data [...] and in the adjacent Arctic Ocean. The coast plays a special role as a transition link. Observation networks, floods of big data and sample density are constantly [...] and the role of atmospheric processes in interactions with land-ocean links in the Arctic climate system. The methodological applications are also used in practice-oriented university teaching and in