Researchers digitized more than 400,000 line-km of archival Antarctic ice-penetrating radar data, originally recorded in the 1970s on 35-mm optical film, and deposited the digitized record into a public archive, enabling the archival data to be compared with modern radar data to provide a record of changes in ice thickness, englacial features, and basal conditions over 40 years or more; comparisons suggest that the Thwaites Eastern Ice Shelf thinned by 10-33% between 1978 and 2009, according to the study.
Article #18-21646: "Multidecadal observations of the Antarctic ice sheet from restored analog radar records," by Dustin M. Schroeder et al.
MEDIA CONTACT: Dustin M. Schroeder, Stanford University, CA; tel: 650-725-7861, 440-567-8343; e-mail: dustin.m.schroeder@stanford.edu
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Proceedings of the National Academy of Sciences