Title An 860 km surface mass-balance profile on the East Antarctic Plateau derived by GPR
Author Muller, K.; Sinisalo, A.; Anschutz, H.; Hamran, S.; Hagen, J.; McConnell, J.R.; Pasteris, D.R.
Author Affil Muller, K., University of Oslo, Department of Geosciences, Oslo, Norway. Other: Norwegian Polar Institute, Norway; Desert Research Institute
Source Glaciology in the International Polar Year, prefaced by G.H. Gudmundsson. Annals of Glaciology, 51(55), p.1-8, . Publisher: International Glaciological Society, Cambridge, United Kingdom. ISSN: 0260- 3055
Publication Date 2010
Notes In English. 38 refs. CRREL Acc. No: 64004750
Index Terms firn; geophysical surveys; glacial geology; ice; ice cover; ice sheets; mass balance; radar; snow; snow cover; surveys; Antarctica--East Antarctic ice sheet; Antarctic ice sheet; Antarctica; East Antarctic ice sheet; geophysical methods; ground-penetrating radar; ice cores; International Polar Year 2007-08; IPY 2007-08 Research Publications; radar methods
Abstract Snow accumulation and its variability on the East Antarctic plateau are poorly understood due to sparse and regionally confined measurements.We present a 5.3 GHz (C- band) ground-penetrating radar (GPR) profile with a total length of 860 km recovered during the joint Norwegian-US International Polar Year traverse 2007/08. Mean surface mass balance (SMB) over the last 200 years was derived from the GPR data by identifying the volcanic deposition of the Tambora eruption in 1815. It varies between 9.1 and 37.7 kgm-2 a-1 over the profile, with a mean of 23.7 kgm-2 a-1 and a standard deviation of 4.7 kgm-2 a-1. The 200 year SMB estimated is significantly lower than most of the SMB estimates over shorter time periods in this region. This can be partly explained by a SMB minimum in the vicinity of the ice divide. However, it is more likely that a recent increase in SMB observed by several studies is largely responsible for the observed discrepancy.
URL http://www.igsoc.org/annals/v51/55/t55A034.pdf
Publication Type journal article
Record ID 300296