Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Polarstern	PS121	10.08.2019 - 13.09.2019	FRAM TIEFSEE-OBSERVATORIUM HAUSGARTEN	Norwegian Sea Fram strait

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Metfies Katja	Alfred-Wegener-Institut fur Polar- und Meeresforschung	Bremerhaven	Troms?

Ziel der Reise / Objectives of Cruise:

Expedition PS121 started on August 10, 2019 in Bremerhaven with the destination Fram Strait. Most of the planned work and projects of this expedition focused on the the continuation of the HAUSGARTEN long-term observatory established 20 years ago by the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research in the Fram Strait and the implementation of the Helmholtz Infrastructure Initiative FRAM (Frontiers in Arctic Marine Monitoring). An interdisciplinary team of scientists from five different national and international research institutes has carried out research and experiments that included almost all areas of the marine ecosystem, from the atmosphere, to the water column, to the seabed in several thousand meters. The aim of their research activities was to improve observations and our understanding of the marine biodiversity and climate-relevant processes of the Arctic Ocean in the context of climate change. Various optical observation systems (OFOS, LOKI, PELAGIOS, in situ Particle Camera) and targeted samplers (Multinet Midi, Multinet Maxi, Drifting Sediment Trap, Marine Snow Catcher, in situ Pumps) have been used for investigations in the water column and the deep-sea (Multicorer). In addition, long-term moorings were replaced and the mooring program was extended by one additional long-term mooring. The moorings are equipped with sensor systems and samplers for year-round biological, physical and chemical studies in the water column. Paul, the autonomous underwater vehicle, has dived for the first time to a depth of more than 2000 meters to the bottom of the sea to obtain high-resolution information on the nature of the seabed in the study area. ROV PHOCA of GEOMAR Helmholtz Centre for Ocean Research Kiel has been used in several dives to perform experiments at the deep-sea floor. Several Landers (O2-Lander, Camera Lander, Baited-Lander) were used in short-term deployments for seafloor experiments and measurements. A long-term lander and two different autonomous robots were exchanged

Messungen / Measurements

Verankerungen / Moorings