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Investigating the potential to determine the upstream accumulation rate, using mass flux calculations along a cross-section on a small tributary glacier in Heimefrontfjella, Dronning Maud Land, Antarctica
Uppsala universitet, Luft-, vatten och landskapslära.
Uppsala universitet, Miljö- och landskapsdynamik.
Ansvarig organisation
2004 (Engelska)Ingår i: Annals of Glaciology, ISSN 0260-3055, E-ISSN 1727-5644, Vol. 39, nr 1, s. 175-180Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

How well can we estimate the incoming ice flux by calculating the ice flux through a well-defined cross-section? We test this by comparing calculated ice flux out from the small glacier Bonnevie-Svendsenbreen with the measured accumulation rate integrated over the well-defined catchment area in the Sivorgfjella plateau, Dronning Maud Land, Antarctica (74°45′S, 11°10′W). The ice flux is calculated using ice-dynamical properties from an ice temperature model and the distribution of forces calculated using a force-budget model. The input we use includes velocity data of the glacier surface, combined with ice-thickness measurements. The result is an accumulation rate on the Sivorgfjella plateau of 0.50 ± 0.05 m w.e.a−1. We find that this is similar to the accumulation rate recorded by ground-penetrating radar work in the area. We therefore find the balance-flow method, in combination with the force-budget technique and ice temperature modeling, to be a useful tool for studies of mass fluxes in a catchment area. The most important source of uncertainty in these calculations is the quality and the spatial distribution of the ice surface velocity data. The high accumulation rate shows the effect of orographic enhancement on accumulation in montane areas in Antarctica.

Ort, förlag, år, upplaga, sidor
2004. Vol. 39, nr 1, s. 175-180
Nationell ämneskategori
Geovetenskap och miljövetenskap
Forskningsämne
SWEDARP 2002/03, DML 2002/03; SWEDARP 1989/90, ANT VIII/5
Identifikatorer
URN: urn:nbn:se:polar:diva-3412DOI: 10.3189/172756404781814555OAI: oai:DiVA.org:polar-3412DiVA, id: diva2:1078192
Konferens
Papers from the Seventh International Symposium on Antarctic Glaciology(ISAG-7)held at Milano, Italy,25-29 August, 2003
Tillgänglig från: 2004-04-16 Skapad: 2017-03-02 Senast uppdaterad: 2017-11-29

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