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Ice flux of Plogbreen, a small ice stream in Dronning Maud Land, Antarctica
Responsible organisation
2004 (English)In: ANNALS OF GLACIOLOGY, VOL 39, 2004, Uppsala Univ, Dept Earth Sci, S-75236 Uppsala, Sweden., 2004, 409-416 p.Conference paper, Published paper (Refereed)
Abstract [en]

As part of a long-term mass-balance program run by SWEDARP since 1988, a detailed study on Plogbreen, Dronning Maud Land, Antarctica, was undertaken during the austral summer of 2003 to investigate the long-term mass balance. We compare ice outflux, phi(out), through a cross-sectional gate with ice influx, phi(in), from the upstream catchment area. The phi(in) is based on calculations of snow accumulation upstream of the gate using data available from published ice-core records. The phi(out) is based on Glen's flow law aided by thermodynamic modeling and force-budget calculations. Input data from the field consist of measurements of ice surface velocity and ice geometry. The ice surface velocity was measured using repeated differential global positioning system surveying of 40 stakes over a period of 25 days. The ice geometry was determined by 174 km of ground-penetrating radar profiling using ground-based 8 MHz dipole antennas. This study presents the collected velocity and geometry data as well as the calculated ice flux of Plogbreen. The results show a negatively balanced system within the uncertainty limits; phi(out) = 0.55 +/- 0.05 km(3) a(-1) and phi(in) = 0.4 +/- 0.1 km(3) a(-1). We speculate that the negative balance can be explained by recent eustatic increase reducing resistive stresses and inducing accelerated flow.

Place, publisher, year, edition, pages
Uppsala Univ, Dept Earth Sci, S-75236 Uppsala, Sweden., 2004. 409-416 p.
Series
Annals of Glaciology-Series, ISSN 0260-3055 ; 39
Research subject
SWEDARCTIC
Identifiers
URN: urn:nbn:se:polar:diva-2434DOI: 10.3189/172756404781813844ISI: 000232368400062ISBN: 0-946417-34-2 (print)OAI: oai:DiVA.org:polar-2434DiVA: diva2:883548
Conference
7th International Symposium on Antarctic Glaciology (ISAG-7), AUG 25-29, 2003, Milan, ITALY
Available from: 2015-12-17 Created: 2015-10-07 Last updated: 2015-12-17

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
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  • asciidoc
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