the Arctic Coastal Plain near Barrow (Alaska) (Photo: Alfred-Wegener-Institut) Fig.2: Northern part of the Mackenzie Delta (Photo: Alfred-Wegener-Institut) Fig.3: Flight pattern of Polar5 for measurements [...] Alfred-Wegener-Institut) Fig.4: Vertical profiles of temperature (red) and methane concentration (blue) in the atmospheric boundary layer over Arctic permafrost wetland. (Graphic: Alfred-Wegener-Institut) [...] Arctic Wetlands (AirMeth) Fig.6: Polar5 flying at low lever over Arctic permafrost. (Photo: Alfred-Wegener-Institut) The atmospheric concentration of methane, a potent greenhouse gas, has a significant maximum

/ AWI, 2014) (Photo: Alfred Wegener Institut) Polar Meteorology Earth Observing Systems Remote sensing of the Cryosphere (© ESA / USGS / NASA / NSIDC) (Photo: Alfred Wegener Institut) Remote sensing technology [...] ESA / Envisat, 2006) (Photo: Alfred Wegener Institut) Drift and deformation of sea ice Polynias Terra Nova Bay Polynia (© NSIDC / Modis, 2013) (Photo: Alfred Wegener Institut) Observation of coastal polynias [...] Landsat-8, 2012) (Photo: Alfred Wegener Institut) Mass loss of the antarctic ice shield Snow Accumulation Inland ice in Antarctica (© ESA / Envisat, 2008) (Photo: Alfred Wegener Institut) Retrieval of snow

/ AWI, 2014) (Photo: Alfred Wegener Institut) Polar Meteorology Earth Observing Systems Remote sensing of the Cryosphere (© ESA / USGS / NASA / NSIDC) (Photo: Alfred Wegener Institut) Remote sensing technology [...] NASA / Landsat , 2000) (Photo: Alfred Wegener Institut) Charting the Arctic Tundra Polynias Terra Nova Bay Polynia (© NSIDC / Modis, 2013) (Photo: Alfred Wegener Institut) Observation of coastal polynias [...] Landsat-8, 2012) (Photo: Alfred Wegener Institut) Mass loss of the antarctic ice shield Snow Accumulation Inland ice in Antarctica (© ESA / Envisat, 2008) (Photo: Alfred Wegener Institut) Retrieval of snow

Model Simulations What are sea ice models used for? Example of a sea ice model (Graphic: Alfred Wegener Institut) The Arctic areas - ocean even more than land - are difficult to reach, for several winter

stable water isotope values of ice cores from Northern Greenland (Graphic: Stefanie Weißbach, Alfred-Wegener-Institut) Human activities have serious impacts on the global environmental system and will, amongst

of images from Mann et al. (2004) . Screenshot SHERPA (Photo: Alfred-Wegener-Institut) Segmented diatom valve (Photo: Alfred-Wegener-Institut)

informtion can be found on the REKLIM website . Circumpolar Map of Northerm Hemisphere (Graphic: Alfred Wegener Institut) Project collaborators Lars Max Ralf Tiedemann Figure 1: Overview map of high-latitude Northern

region and West Antarctic margin (modified from Kipf et al., Gondwana Research, 2014). (Photo: Alfred-Wegener-Institut) Geodynamic and tectonic processes played a dominant role in forming the present topographic

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

Example of Microstructure Mapping image (Photo: Ilka Weikusat, Alfred-Wegener-Institut) An essential part of ice core research at the AWI consists of mapping the microstructural parameters (grain size