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April 5, 2016

Neumayer Glacier, South Georgia, 5.6 km retreat 1999-2016

  Comparison of Neumayer Glacier in 1999 and 2016 Landsat images; red arrow indicates 1999 terminus locations, yellow arrows 2016 terminus locations. Purple arrows indicate upglacier thinning. South Georgia sits amidst the circum Antarctic westerlies and its¬†maritime climate leads to numerous glaciers. This region is famous for the endless march of storms parading around Antarctica¬†. The island is south of the Antarctic Convergence, preventing any truly warm season from persisting. …


March 9, 2014

Purvis Glacier Retreat, South Georgia Island

Purvis Glacier is on the norteastern coast of the island, terminating on land near Possession Bay. The British Antarctic Survey (BAS) has mapped many aspects of the island including glacier front changes. Their mapping indicated below shows that the Purvis Glacier terminus was on the coastline in 1974. Here we examine Landsat imagery from 1999 to 2014 to identify more recent changes. Cook et al (2010) quantified the change in …


April 10, 2013

Herz Glacier Retreat, South Georgia

Herz Glacier is on the southeast coast of South Georgia Island. The terminus change of this tidewater glacier ending in Iris Bay was completed by the British Antarctic Survey for the 1960-2007 period (Gordon et al, 2008). The map below indicates the slow retreat from 1960-1988 and a more rapid retreat since. Here we examine imagery from Google Earth and Landsat to examine terminus change from 1989-2010. In each image …