• Pre-Quaternary

    stratification in the Arctic Ocean during the Miocene , arktos . doi: 10.1007/s41063-020-00079-8 Lohmann, G. , Knorr, G. , Hossain, A. and Stepanek, C. (2022): Effects of CO2 and Ocean Mixing on Miocene and [...] in the ocean model FESOM. The figure shows a land-sea configuration during the Middle Miocene (~15 million years ago) as incorporated in a complex Earth System Model. For example changes in oceanic gateways [...] between classic hypotheses for glaciations that involve e.g. tectonic changes and associated changes in ocean circulation or declining atmospheric CO 2 in combination with the Earth’s orbital configuration. Research

  • Biogeochemical Sensors

    C., Rabouille, C., Sauter, E., Schewe, I., Soltwedel, T. (2015): Benthic oxygen uptake in the Arctic Ocean margins - A case study at the deep-sea observatory HAUSGARTEN (Fram Strait). PLoS ONE 10(10): [...] Braeckman, U., Hasemann, C., Wenzhoefer, F. (2018): Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth. Biogeosciences 15: 4849-4869. Braeckman [...] Marchant, H., Buckner, C., Bienhold, C., Wenzhöfer, F. (2018): Carbon and nitrogen turnover in the Arctic deep sea: in-situ benthic community response to diatom and coccolithophorid phytodetritus. Biogeosciences

  • Permafrost Resources

    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

  • Flying Drones

    Since the marginal ice zone of the Arctic Ocean is a highly dynamic environment, it is crucial to track the position of the ice edge in order to define AUV (Autonomous Underwater Vehicle) mission parameters

  • Snow on Sea Ice

    snow represents an important fresh water input, which affects density and salinity layers of the ocean. Besides its direct climatic impact, the snow layer also adds to the uncertainty of sea ice thickness [...] vessel. Snow buoy, deployed on sea ice (Photo: Alfred Wegener Institut) We deploy snow buoys in the Arctic and Antarctic. They are equipped with echo sounders to record changes at the snow surface. Buoy data

  • JASPER 2010

    moderately rough arctic sea ice and take ridge height and distribution into account. They are well proven for applications in simulations of flow situations in the northern polar ocean. To prove if they [...] leads and polynias For the energy and moisture exchange between the atmosphere and the ice covered ocean, leads and polynias play an important role. This is documented by many modelling studies, but only [...] sea ice have a significant effect on the energy exchange between the atmosphere and the ice covered ocean. Uncertainties in the representation of sea ice albedo contribute considerably to the differences

  • Past Highlights

    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

  • Publications

    Danilov, N. Koldunov, C.Liu, V. Mueller, D. Sidorenko and T. Jung, 2024: Eddy activity in the Arctic Ocean projected to surge in a warming world . Nature Climate Change , 14 , 156–162, doi.org/10.1038 [...] 387 , 68–73, doi.org/10.1126/science.adq7280 . Wang, Q., S. Danilov, and T. Jung, 2024: Arctic freshwater anomaly transiting to the North Atlantic delayed within a buffer zone. Nature Geosci [...] Beech, N., T. Rackow, T. Semmler, S. Danilov, Q. Wang and T. Jung, 2022: Long-term evolution of ocean eddy activity in a warming world. Nature Climate Change , 9 , 910–917, doi.org/10.1038/s41558-022-01478-3

  • MELTEX-I

    refreezing at the sea ice surface dramatically changes the energy exchange between atmosphere and ocean in the Arctic. Melt ponds play a key role in these changes, because they substantially enhance the absorption [...] albedo of Arctic summer ice from satellite optical data. Remote Sensing of Environment, 163, 153-164. doi:10.1016/j.rse.2015.03.012. Rösel, A.; Kaleschke, L., Birnbaum, G. 2012. Melt ponds on Arctic sea ice [...] early summer, when melt ponds started to form. From 9 May to 8 June 2008, we operated in the Canadian Arctic, mainly over the southern Beaufort Sea with Inuvik as airbase for Polar 5 . Sea ice conditions changed

  • results-S5POC

    Alvarez E. (2022) Toward the Synergistic Use of Ocean Colour Products to Improve the Description of Phytoplankton Productivity within the Global Ocean. ESA Ocean Carbon from Space Workshop, Online event, 14 [...] (2002-2020). ESA Ocean Carbon from Space Workshop, Online event, 14 – 18 February 2022. Poster.​ Bracher A. (2021) S5P+-I-OC : S5P+ Innovation Ocean Color - presentation (Astrid Bracher, AWI ESA Ocean Science Cluster [...] monitoring of surface phytoplankton functional types in the Atlantic Ocean. Report: 7th edition of the Copernicus Marine Service Ocean State Report (OSR 7). State of the Planet. Oelker J., Losa S. N., Richter