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)

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

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

produce base data sets for habitat studies. Larsen A, B, and C ice shelves, Weddell Sea (Graphic: Alfred Wegener Institut) Contact Dr. Boris Dorschel Prof. Dr. Wilfried Jokat Cooperation partners Geology, AWI

campaign performed by the Leipzig Institute for Meteorology (LIM), University of Leipzig and the Alfred-Wegener-Institute (AWI) at Kohnen Station , Antarctica (75°00’ S, 00°04’ E, 2892 m a.s.l.) in austral

Survey, British Antarctic Survey, British Antarctic Survey, Alfred-Wegener-Institut, Alfred-Wegener-Institut, Alfred-Wegener-Institut, Alfred-Wegener-Institut (2014) Atmospheric Boundary Layer Over Coastal [...] Rothera Airstrip (Photo: Alfred-Wegener-Institut) Polar 5 at Rothera. (Photo: Alfred-Wegener-Institut) Twin-Otter (BAS) viewed from Polar 5 near Rothera. (Photo: Alfred-Wegener-Institut) View from Polar [...] Polar 5. (Photo: Alfred-Wegener-Institut) Nygard, T. , Vihma, T. , Birnbaum, G. , Hartmann, J. , Lachlan-Cope, T. , Ladkin, R. , Lüpkes, C. and Weiss, A. (2016) Validation of eight atmospheric reanalyses in

tr-175"> Z 2288 Polarforschung . / hrsg. vom Alfred-Wegener-Institut für Polar- und Meeresforschung / und der Deutschen Gesellschaft für Polarforschung. [...] für Kultur und Medien / hrsg. vom Bundesministerium des Innern . [ Benutzer: <awi1> Passwort: <wegener1> ] Print Ausgabe: 59.2008,52 - GvN Geo. / Gruner & Jahr jeweils letztes Heft Z 1268 Geo-marine letters