snow isn’t just snow. There are clear differences if you compare, e.g., the Arctic and Antarctic. While the snow on the Arctic sea ice is completely melting over the course of the year, and so-called meltwater [...] effectively it insulates, and as such reduces the transfer of heat from the ocean to the atmosphere. However, the less warmth the ocean gives off, the thinner the sea ice remains. Therefore the snow not only [...] 23.09.2019 Scientists Prepare for Year-Long Expedition to Arctic Center Find out more > EOS | 06.09.2019 Light Permeates Seasonally Through Arctic Sea Ice Find out more > Dialogue & Lectures Lecture | 09

Molecular Sea Ice Ecology Polar oceans are seasonally covered by sea ice with an average size of the continent of North America. Despite harsh conditions therein, sea ice and its lower surface can carry [...] community, typically dominated by Diatoms. Sea ice can provide important primary production to polar oceans via these communities, although they are often very patchy. In times of declining sea ice coverage [...] biodiversity, functions provided by its biota, and the future of sea ice communities in a warming ocean. We address these questions through analyses of total communities, their molecular biodiversity and

in different Arctic environments. Contact: A. Boetius, C. Bienhold, M. Wietz Literature: Cardozo Mino, M., Fadeev, E., Salman-Carvalho, V., Boetius, A. (2021). Spatial Distribution of Arctic Bacterioplankton [...] Effects of Ice-Algal Aggregate Export on the Connectivity of Bacterial Communities in the Central Arctic Ocean. Frontiers in Microbiology 9. doi: 10.3389/fmicb.2018.01035 Hoffmann, K., Hassenrück, C., Sal [...] Boetius, A. (2014): Composition, Buoyancy Regulation and Fate of Ice Algal Aggregates in the Central Arctic Ocean. PLOS One 9(9): e107452. doi:10.1371/journal.pone.0107452 Jacob, M., Soltwedel, T., Boetius, A

and temporal variation in deep-sea meiofauna at the LTER Observatory HAUSGARTEN in Fram Strait (Arctic Ocean). MDPI - Diversity 12 (7). doi: 10.3390/d12070279 Käß, M., Vedenin, A., Hasemann, C., Brandt, [...] biomass of three epibenthic invertebrates from the deep-sea observatory HAUSGARTEN (Fram Strait, Arctic Ocean). Marine Ecology-Progress Series 602: 15-29. Grzelak, K., Kotwicki, L., Hasemann, C., Soltwedel [...] assessing temporal variations in benthic community structure, megafaunal composition and diversity at the Arctic deep-sea observatory HAUSGARTEN between 2004 and 2015. Deep-Sea Research I 122: 81-94. Vedenin, A

of sea-ice and ocean dynamics in the Laptev Sea and to investigate the ecological consequences of environmental changes in key regions of the transpolar drift, and to study effects of ocean acidification [...] Furthermore, the Deep-Sea Research Group leads the Helmholtz infrastructure project FRAM (Frontiers in Arctic marine Monitoring) and is also partner of the Helmholtz alliance ROBEX (Robotic Exploration of Extreme

biomass of three epibenthic invertebrates from the deep-sea observatory HAUSGARTEN (Fram Strait, Arctic Ocean). Marine Ecology Progress Series 602: 15-29. Taylor, J., Krumpen, T., Soltwedel, T., Gutt, J. [...] The vertically facing towed camera system OFOS (Ocean Floor Observation System) is used to assess large-scale distribution patterns of larger epi-benthic organisms and other objects (e.g. dropstones, garbage) [...] assessing temporal variations in benthic community structure, megafaunal composition and diversity at the Arctic deep-sea observatory HAUSGARTEN between 2004 and 2015. Deep-Sea Research I 122: 81-94. Taylor, J

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

research with an Autonomous Underwater Vehicle: Payload structure and arctic operations. OCEANS - Bergen, 2013 MTS/IEEE, doi:10.1109/OCEANS-Bergen.2013.6608043. Wulff, T., Lehmenhecker, S., Hoge, U. (2010) [...] On their way through the ocean they carry different instruments to measure several parameters from the temperature of the water to the amount of light penetrating the ocean. At the end of a mission the [...] I 115: 253-264. Wulff, U., Wulff, T. (2015). Correcting Navigation Data of Shallow-Diving AUV in Arctic. Sea Technology 56(3): 27-30. Wulff, T., Lehmenhecker, S., Bauerfeind, E., Hoge, U., Shurn, K., Klages

the establishment of the FRAM (Frontiers in Arctic marine Monitoring) Ocean Observing System improves our monitoring capacities. LTER Observatory HAUSGARTEN Ocean Observing System FRAM [...] Understanding the ocean, and the complex physical, biological, and biogeochemical systems operating within it, is a challenge for the opening decades of the 21st century. The establishment of multidisciplinary [...] multidisciplinary ocean observatories by the Alfred Wegener Institute will help to provide the means to accomplish this goal. Ecological time-series work at the LTER (Long-Term Ecological Research) site HAUSGARTEN

Boetius, A. (2013): FRAM - FRontiers in Arctic marine Monitoring: Permanent Observations in a Gateway to the Arctic Ocean. OCEANS - Bergen, 2013 MTS/IEEE. doi:10.1109/OCEANS Bergen.2013.6608008 Publications featuring [...] FRontiers in Arctic marine Monitoring Our ability to understand the complex interactions of biological, chemical, physical, and geological processes in the ocean and on land is still limited by the lack [...] interdisciplinary observation infrastructures. The main purpose of the planned open-ocean infrastructure FRAM (FRontiers in Arctic marine Monitoring) is permanent presence at sea, from surface to depth, for the