Ice Mass Dynamics in Greenland and Antarctic

Conceptual view of the interplay between the mantle and the Greenland Ice Sheet across the plume track (graphics: A. Petrunin, GFZ)
Present-day location of the Iceland plume and zones of the mantle plume-induced thinning of the lithosphere and active melting at the ice base (graphics: A. Petrunin, GFZ)
Modeled basal ice temperatures of the present-day Greenland Ice Shield across the Summit region, GRIP and GISP2 indicate borehole locations. (Image: A. Petrunin, GFZ)
Summit Camp, Greenland (Photo: J.Schütte, GFZ)
Seismometer-Vault (Photo: J.Schütte, GFZ)
Ein Blick in den Fjord etwa 40 km flussabwärts des größten Gletschers Grönlands, Jakobshavn Isbrae. Der Vordergrund dieses Ende Mai 2013 erzeugten Bildes zeigt den verbliebenen Schnee auf der Tundra-Landschaft. Der Hintergrund zeigt die Eisberge von Jacobshavn Isbrae. (Image: GFZ)
Geoid height change 2003 - 2007 in mm / year. The reduction of ice mass in Greenland, Northwestern Canada and the western Antarctic are clearly visible. The glacial-isostatic mass inflow under North America and Scandinavia is due to the continued rise of the earth's crust until today, after the ice melted during the last ice age. In the Amazon region a distinct mass signal can be recognized by variations in rainfall. The Sumatra earthquake (2004) generated a characteristical positive-negative-signature by the sudden seismic mass shift in the Earth's crust. (Image: GFZ)
Time series of mass changes in Greenland. (Image: GFZ)
Midnight sun in the Discobay area, West Greenland. The bay, illuminated by low-standing sun during this early-summer night, is crowded by icebergs diverse in shape and size, fed by Greenland’s largest and fast-flowing glacier, Jakobshavn Isbrae. (Image: I.Sasgen, GFZ)
Floating icebergs from Greenland’s largest glacier, Jakobshavn Isbrae. The smooth side indicates part of the iceberg that has already tipped over as sub-marine melting brought it out of balance. (Image: I.Sasgen, GFZ)
Floating icebergs from Greenland’s largest glacier, Jakobshavn Isbrae.(Image: I.Sasgen, GFZ)
Rate der Geoidhöhenänderung über Nordamerika durch glazialisostaische Anpassung und Eismassenverluste in Grönland und Alaska beobachtet mit GRACE zwischen August 2002 und August 2011. Die glazialisostatische Anpassung beschreibt den Deformation der Erde durch die Eispanzer der letzten Eiszeit. Heute fließt verdrängtes Mantelmaterial zurück in die Gebiete früherer Vereisung (Zunahme der Geoidhöhe; rot). Die Eismassenverluste (Abnahme der Geoidhöhe; blau) in Alaska und Grönland sind zum großen Teil eine direkte Antwort auf die rezente Erwärmung der Polargebiete. (Image: GFZ)
The two GRACE (Gravity Recovery and Climate Experiment) satellites will map the Earth's gravity field during their 5-year mission. The GRACE satellites are developped and produced by Astrium GmbH in Friedrichshafen, Germany for NASA/JPL. (M) (Image: Astrium/GFZ)
 

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