George Alexander als Cross, Rollenbild, Kniestück, in: Samuel Johnson: The Idler, London: St. James's Theatre

Signatur des Originals: S 36/F08064

George Alexander als Dr. Bill, Rollenbild, Kniestück, London: St. James's Theatre

Signatur des Originals: S 36/F08065

George Meader, Szenenfoto

Signatur des Originals: S 36/F09241

George Clemont Martin, Brustbild

Signatur des Originals: S 36/F09200

Else Knott als Dortchen Lakenreißer, Szenenfoto, Brustbild, in: William Shakespeare (Robert George): König Heinrich IV., Frankfurt a. M.: Römerbergfestspiele, 1937

Signatur des Originals: S 36/F12094

Lotte Brackebusch als Frau Hurtig, Rollenbild, Brustbild, in: William Shakespeare (Robert George): König Heinrich IV, Frankfurt a. M.: Römerbergfestspiele, 1937

Signatur des Originals: S 36/F12041

Eva Bubat als Lady Percy, Rollenbild, Kniestück, in: William Shakespeare (Robert George): König Heinrich IV., Frankfurt a. M.: Römerbergfestspiele, 1937

Signatur des Originals: S 36/F12046

Hermann Schomberg als Sir John Falstaff, Rollenbild, Brustbild, in: William Shakespeare (Gobert George): König Heinrich IV., Frankfurt a. M.: Römerbergfestspiele, 1937

Signatur des Originals: S 36/F12150

Hermann Schomberg als Sir John Falstaff, Rollenbild, in: William Shakespeare (Robert George): König Heinrich IV., Frankfurt a. M.: Römerbergfestspiele, 1937

Signatur des Originals: S 36/F12152

Mass balance measurements on King George Island ice cap in 2007 and 2008

The Antarctic Peninsula has been identified as a region of rapid on-going climate change with impacts on the cryosphere. The knowledge of glacial changes and freshwater budgets resulting from intensified glacier melt is an important boundary condition for many biological and integrated earth system science approaches. We provide a case study on glacier and mass balance changes for the ice cap of King George Island. The area loss between 2000 and 2008 amounted to about 20 km**2 (about 1.6% of the island area) and compares to glacier retreat rates observed in previous years. Measured net accumulation rates for two years (2007 and 2008) show a strong interannual variability with maximum net accumulation rates of 4950 mm w.e./a and 3184 mm w.e./a, respectively. These net accumulation rates are at least 4 times higher than reported mean values (1926-95) from an ice core. An elevation dependent precipitation rate of 343 mm w.e./a (2007) and 432 mm w.e./a (2008) per 100 m elevation increase was observed. Despite these rather high net accumulation rates on the main ice cap, consistent surface lowering was observed at elevations below 270 m above ellipsoid over an 11-year period. These DGPS records reveal a linear dependence of surface lowering with altitude with a maximum annual surface lowering rate of 1.44 m/a at 40 m and -0.20 m/a at 270 m above ellipsoid. These results fit well to observations by other authors and surface lowering rates derived from the ICESat laser altimeter. Assuming that climate conditions of the past 11 years continue, the small ice cap of Bellingshausen Dome will disappear in about 285 years.

Chemical composition of soils and rocks from King George Island

Both the olivine-hearing tholeiite basalts of the island and the brown soils which have developed on the basalts contain 2-20% of a swelling clay mineral. It emerges from chemical, optical, X-ray diffraction and differential thermal analytical studies that this clay mineral is a Mg-rich, Fe2+ and AI-bearing tri-octahedral smectite, e. g. Mg-saponite. Due to petrographic and crystal chemical properties the saponite should have been formed by hydrothermal alteration of the primary Mg-Fe-minerals olivine and clinopyroxene. The soils consist of plagioclase, saponite and goethite which has been formed by chemical weathering within the soils. In the uppermost layer some of the soils contain humic substances and phosphatic material, the latter may be related to the recent production of guano.

Surface velocity and ice discharge of the ice cap on King George Island, Antarctica

Glaciers on King George Island, Antarctica, have shown retreat and surface lowering in recent decades, concurrent with increasing air temperatures. A large portion of the glacier perimeter is ocean-terminating, suggesting possible large mass losses due to calving and submarine melting. Here we estimate the ice discharge into the ocean for the King George Island ice cap. L-band synthetic aperture radar images covering the time-span January 2008 to January 2011 over King George Island are processed using an intensity-tracking algorithm to obtain surface velocity measurements. Pixel offsets from 40 pairs of radar images are analysed and inverted to estimate a weighted average surface velocity field. Ice thicknesses are derived from simple principles of ice flow mechanics using the computed surface velocity fields and in situ thickness data. The maximum ice surface speeds reach mayor que 225 m/yr, and the total ice discharge for the analysed flux gates of King George Island is estimated to be 0.720+/-0.428 Gt/yr, corresponding to a specific mass loss of 0.64+/-0.38 m w.e./yr over the area of the entire ice cap (1127 km2).

Toggle harpoon heads from the Aleutian Islands / George I. Quimby, Curator of Exhibits, Department of Anthropology.

v.36:no.2(1946)