Antarctic peninsula (Photo: Alfred Wegener Institut) Underwater recruitment experiment, Antarctica (Photo: Alfred Wegener Institut) Macroalgae at Helgoland (Photo: Alfred Wegener Institut) We study if and how

being carried out in the circumpolar regions of the world. ICRSS-2006 group shot (Photo: Alfred-Wegener-Institut) 10th ICRSS 2008 (Whitehorse, Yukon, Canada) The 10 th International Circumpolar Remote [...] carried out in the circumpolar regions and elsewhere. ICRSS-2008 conference photo (Photo: Alfred-Wegener-Institut) 11th ICRSS 2010 (Cambridge, United Kingdom) The 11th International Circumpolar Remote Sensing [...] work currently being carried out in the circumpolar regions. ICRSS-2010 group photo (Photo: Alfred-Wegener-Institut) 12th ICRSS 2012 (Levi, Finland) The theme of the 12 th CRSS symposium, May 14-18 2012 in

supporting the great Alfred Wegener on his research expeditions to the Arctic. “...and make sure that one watch is set aside for Rasmus, who will be accompanying us.” Alfred Wegener, 6 October 1930 Rasmus Willumsen [...] of the Greenlanders who provided support on Wegener’s ill-fated 1930 expedition. To resupply his colleagues at the overwintering station “Eismitte”, Wegener took 15 dog sledges, Dr Fritz Lowe and 13 G [...] back, Wegener died, most likely from a heart attack caused by overexertion due to the still extremely difficult conditions. When his body was discovered six months later, the rescue team found Wegener fully

successfully applied to North Atlantic/Arctic Ocean Sea Ice Model (NAOSIM) developed at the Alfred Wegener Institute (AWI). We are currently working to apply the systems to Finite-volumE Sea ice-Ocean Model [...] simulation without data assimilation, red: model simulation with data assimilation. (Graphic: Alfred-Wegener-Institut) Spatial pattern of sea ice extent in September, from 1990 to 2010 (every 5 years). Black: [...] simulation without data assimilation, black: model simulation with data assimilation. (Graphic: Alfred-Wegener-Institut) Spatial pattern of sea ice motion in August 2006: Left panel: model simulation without

shrimp from the mudflats (Photo: M. Bögner Alfred-Wegener-Institut) Not a typical mudflat dweller - researcher stuck in the mud (Photo: M. Bögner Alfred-Wegener-Institut) The brown shrimp Crangon cragnon is [...] is a typical inhabitant of the mudflats. (Photo: M. Bögner Alfred-Wegener-Institut) A research traveller (Photo: M. Bögner Alfred-Wegener-Institut)

Birnbaum Dr. Thomas Krumpen Melt ponds on Multi year ice (Photo: Alfred-Wegener-Institute) Melt ponds on First-year ice (Photo: Alfred-Wegener-Institute) Instrumentation The aircraft Polar 5 was equipped with [...] . Flight legs at 200 ft (61 m) (Graphic: W. Cohrs, Alfred-Wegener-Institute) Flight legs at 2000 ft (610 m) (Graphic: W. Cohrs, Alfred-Wegener-Institute)

Birnbaum Dr. Thomas Krumpen Melt ponds on Multi year ice (Photo: Alfred-Wegener-Institute) Melt ponds on First-year ice (Photo: Alfred-Wegener-Institute) Instrumentation The aircraft Polar 5 was equipped with [...] . Flight legs at 200 ft (61 m) (Graphic: W. Cohrs, Alfred-Wegener-Institute) Flight legs at 2000 ft (610 m) (Graphic: W. Cohrs, Alfred-Wegener-Institute)

Cavity RingDown-Spectrometer Picarro L2120i with vaporizer (photo: Alfred Wegener Institute, Levent Vorpahl) (Photo: Alfred-Wegener-Institut, Levent Vorpahl) Picarro L2140i Cavity RingDown-Spectrometer Picarro [...] PAL HTC-xt Autosampler and A0211 Vaporizer for H and O isotopes (in water samples). (Photo: Alfred-Wegener-Institut, Levent Vorpahl) Picarro L2130i Cavity RingDown-Spectrometer 1 Picarro L2130i Cavity RingDown [...] with A0101 Autosampler and A0211 Vaporizer for H and O isotopes (in water samples). (Photo: Alfred-Wegener-Institut, Levent Vorpahl) Polar Terrestrial Environmental Systems: <link en science geosciences

station. Picture: S. Trimborn (Photo: Alfred-Wegener-Institut) CO2 incubation experiments with Ryder ay phytoplankton. Picture: S. Trimborn (Photo: Alfred-Wegener-Institut) Sampling of seawater containing [...] research station Rothera on the Western Antarctic Peninsula. Picture: S. Trimborn (Photo: Alfred-Wegener-Institut) Climate models indicate that the Southern Ocean is particularly prone to climate change [...] Ryder Bay phytoplankton. Picture: S. Trimborn (Photo: Alfred-Wegener-Institut) Contact: Dr. Scarlett Trimborn

operation. (Photo: Alfred Wegener Institut) Deployment of the DEPAS OBS. (Photo: Alfred Wegener Institut) DEPAS OBS after emerging at the sea surface. (Photo: Alfred Wegener Institut) Number of instruments [...] Technology A description of the DEPAS instruments can be found in this publication: Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung et al., 2017: DEPAS (Deutscher Geräte-Pool