analyses 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

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

been 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 [...] 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). [...] 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

dynamics and Earth System feedbacks Permafrost coring in the Fish Creek Delta, North Alaska (Photo: Alfred Wegener Institut) Arctic permafrost landscapes change rapidly under the influence of natural and ant [...] permafrost carbon pools and their vulnerability to mobilization Alaskan Yedoma cliff (Photo: Alfred Wegener Institut) Arctic landscapes underlain by permafrost are threatened by climate warming and may [...] Degradation of ice-rich permafrost by thermal erosion thermoerosional valley Kurungnakh (Photo: Alfred-Wegener-Institut) Thermo-erosional valleys are widely distributed in ice-rich permafrost deposits of

Remote Sensing Map of Arctic sea ice thickness (April 2015) obtained from CryoSat-2 data (Graphic: Alfred Wegener Institut) Contact: Dr. Stefan Hendricks The inaccessibility and sheer size of sea ice covered [...] based on measuring the height of ice floes above the sea surface with radar altimeters (Graphic: Alfred Wegener Institut)

sledges across the sea ice of Atka Bay (Photo: Alfred Wegener Institut) Helicopter EM Sensor Helicopter EM sensor measuring sea ice thickness (Photo: Alfred Wegener Institut) AEM measurement by Polar 5

content (integrated in the area in blue on the map) freFresh water content cha (Graphic: T. Kovacs, Alfred-Wegener-Institut) The Arctic Ocean receives freshwater by run-off from Asia north of the Himalaya. Large

Methane Airborne measurements of atmospheric methane Methane signal over a lake. (Graphic: Alfred-Wegener-Institut) Methane (CH4) is an important greenhouse gas. Though its concentration in the atmosphere