Logistics International/national collaboration: Expeditions 2024 to the Arctic PS143/1 & PS143/2; Project: FRAM HAUSGARTEN Frank Wenzhöfer & Katja Metfies (GPF23-1_013) Goals: • Long-term ecological research in [...] E-Mail Participants: 2 x 50 Free berths: - Period: June - August 2024 Days at sea : 61 Working Area: Fram Strait Disciplines: Marine Technology, Physical Oceanography, Long-Term Observations (LTO), Long-Term [...] forms part of a framework of international consortia (GEOTRACES, ArcWatch-LTO). It is supported by FRAM observatory technology, and contributes to a time series of four expeditions to the CAO in the POF4

web (Graphic: Katja Metfies) Head of working group Dr. Katja Metfies HIFMB Cooperations HIFMB PEBCAO FRAM PrimePrevention MareExtreme Obama_Next Scientific approach Technology Projects Team

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, U., Janssen [...] Benthic oxygen uptake in the Arctic Ocean margins - A case study at the deep-sea observatory HAUSGARTEN (Fram Strait). PLoS ONE 10(10): e01383. Boetius, A., Wenzhöfer, F. (2013): Seafloor oxygen consumption fuelled

ships, e.g. Polarstern and air-supported spring expeditions, autonomous ice-tethered buoy systems like FRAM or MIDO have enabled a nearly year-round, Arctic basin-wide coverage of temperature and salinity profile

Dr. Judith Piontek Dr. Ian Salter associated groups: PLANKTOSENS Langzeitobservatorium HAUSGARTEN FRAM ICEFLUX

tolerate the heat as well as its ad- versary from the south. Fram Strait: Highway for species migration In the course of climate change the Fram Strait has be- come a highway for species migration. Atlantic [...] Ocean to the north via two ways (Fram Strait and Barents Sea) – and the volume is ten times that on the Pacific side. Around half of that turns around immediately in the Fram Strait. The other half, however [...] mountain ranges. The only deep-sea connection between the Arctic Ocean and other oceans runs through the Fram Strait – the passage between Greenland and Spitsbergen. Warming, acidification, altered stratification

and phytoplankton functional types (PFT) using shipboard underway AC-S flow-through system in the Fram Strait. These quality-controlled datasets are finally used to validate the quality of the Chl-a datasets [...] -M., Hellmann S., Wiegmann S., Bracher A. (in press 22 Jan 2018) Underway spectrophotometry in the Fram Strait (European Arctic Ocean): a highly resolved chlorophyll a data source for complementing satellite [...] between Chl-a data obtained from underway AC-S flow-through system and HPLC measurements during the Fram Strait cruises PS93.2 and PS99.2.

Wegener Institute established the LTER (Long-Term Ecological Research) observatory HAUSGARTEN in the Fram Strait. HAUSGARTEN observatory displays 21 permanent stations covering a water depth range of 250 [...] HAUSGARTEN observatory is successively extended within the frame of the HGF infrastructure project FRAM (Frontiers in Arctic marine Monitoring). Contact: T. Soltwedel, M. Bergmann, C. Hasemann , E.-M. Nöthig

ecological role of marine mammals in the Arctic Ocean. Data stem from the interdisciplinary Arctic FRAM ocean observatory, which provides a unique opportunity to gain insight into these interrelationships [...] environmental alterations triggered by climate change, such as sea-ice decline. Using data collected in Fram Strait, I am investigating potential impacts of climate change on the acoustic presence of endemic [...] Patterns in the Acoustic Presence and Vocal Behaviour of Bowhead Whales (Balaena mysticetus) in Eastern Fram Strait Diandra Duengen (2019), Master Uni Oldenburg Fin whale (Balaenoptera physalus) distribution

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, U., Janssen