Rick Lumpkin and Kevin Speer, J. Phys. Oceanogr., 2007. (Photo: Alfred-Wegener-Institut) The Southern Ocean forms a continuous ring of water around Antarctica, which connects all other oceans. It thus

maintained by six different research institutes. Modified Di (Photo: Alfred-Wegener-Institut) The Arctic boundary has been observed over many years to better understand and monitor the exchanges between the [...] during 2004-2010 will be quantified under ARCGATE project. (Photo: Alfred-Wegener-Institut) The ARCGATE also aims to address important questions to design future sustained pan-Arctic observation lines [...] ; the Norwegian Polar Institute (NPI) in Tromsø, Norway and the Alfred Wegener Institute (AWI) in Bremerhaven, Germany for western and eastern Fram Strait, respectively; the Institute of Marine Research

developments. Our working area offshore Northeast Greenland (Photo: Alfred Wegener Institut) Contact Dr. Boris Dorschel Dr. Catalina Gebhardt Cooperation partners UI Tromsø, Norway GEUS, Denmark

Ocean-Ice Shelf Interaction Figure 1: Map of Antarctica (Graphic: Alfred-Wegener-Institut) The accelerating rate of mass loss of the Antarctic and Greenland ice sheets, responsible for global sea level [...] Ice Sheet tomorrow Results of numerical models, developed at the Alfred Wegener Institute to study the sea ice-ocean-ice shelf system under climate change, show that atmospheric conditions in the southern [...] hydrographischen Bedingungen im südlichen Weddellmeer. (Graphic: Alfred-Wegener-Institut) Figure 3: Bottom topography beneath the Antarctic Ice Sheet according to Bedmap2. (Graphic: BAS)

of faults and heat sources. Hydrothermal ventfields (Graphic: Alfred-Wegener-Institut)

Haakon and Polarstern at the Aurora Hydrothermal Ventfield (Photo: Alfred-Wegener-Institut)

Aerobics Mehr in Kürze (Photo: Alfred-Wegener-Institut) Head of Group Dr. Felix Mark Team Isabel Ketelsen

of an Ice-Tethered Profiler (Rick Krishfield, WHOI) (Photo: Alfred-Wegener-Institut) Ice-Tethered Profilers (ITPs) are autonomous, freely drifting measurement platforms that record vertical profiles [...] shown in blue shading (in meters from the water surface). (Photo: Alfred-Wegener-Institut)

tongue of the 79° North Glacier. (Graphic: Martin Künsting, Alfred-Wegener-Institut) Our oceanographic work focuses on measurements near the calving front of the 79° North Glacier, Greenland’s longest

with more planning. Sensors Typical sensor configuration (Photo: Alfred-Wegener-Institut) Specialty of CTD data CTD Sensors: starboard and port side of the "Triaxus" sensor carrier (Photo: Alfred-Wegener-Institut [...] measuring in vertical "Undulation" mode Undulation mode (Photo: Alfred-Wegener-Institut) Triaxus data example based on PS113 024_02 "equator crossing" (Photo: Alfred-Wegener-Institut) With the setting [...] ) Triaxus with Depressor, towed behind RV Polarstern. (Photo: Alfred-Wegener-Institut)