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Rapid retreat, acceleration and thinning of Glaciar Upsala, Southern Patagonia Icefield, initiated in 2008

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Title: Rapid retreat, acceleration and thinning of Glaciar Upsala, Southern Patagonia Icefield, initiated in 2008
Authors: Sakakibara, Daiki Browse this author
Sugiyama, Shin Browse this author →KAKEN DB
Sawagaki, Takanobu Browse this author →KAKEN DB
Marinsek, Sebastian Browse this author
Skvarca, Pedro Browse this author
Issue Date: Jul-2013
Publisher: International Glaciological Society
Journal Title: Annals of Glaciology
Volume: 54
Issue: 63
Start Page: 131
End Page: 138
Publisher DOI: 10.3189/2013AoG63A236
Abstract: The Patagonia lcefields are characterized by a large number of outlet glaciers calving into lakes and the ocean. In contrast to the recent intensive research activities on tidewater glaciers in other regions, very few observations have been made on calving glaciers in Patagonia. We analysed satellite images of Glaciar Upsala, the third largest freshwater calving glacier in the Southern Patagonia Icefield, to investigate changes in its front position, ice velocity and surface elevation from 2000 to 2011. Our analyses revealed a clear transition from a relatively stable phase to a rapidly retreating and fast-flowing condition in 2008. The glacier front receded by 2.9 km, and the ice velocity increased by 20-50%, over the 2008-11 period. We also found that the ice surface lowered at a rate of up to 39 m a(-1) from 2006 to 2010. This magnitude and the rate of changes in the glacier front position, ice velocity and surface elevation are greater than previously reported for Glaciar Upsala, and comparable to recent observations of large tidewater glaciers in Greenland. Our data illustrate details of a rapidly retreating calving glacier in Patagonia that have been scarcely reported despite their importance to the mass budget of the Patagonia Icefields.
Rights: © 2013 International Glaciological Society
Type: article
URI: http://hdl.handle.net/2115/54110
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 榊原 大貴

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