Title Modelling accreted ice in subglacial Lake Vostok, Antarctica
Author Thoma, M.; Grosfeld, K.; Mayer, C.
Author Affil Thoma, M., Alfred Wegener Institute für Polar and Marine Research, Bremerhaven, Federal Republic of Germany. Other: Bayerische Akademie der Wissenschaften, Federal Republic of Germany
Source Geophysical Research Letters, 35(11), Citation L11504. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0094-8276
Publication Date 2008
Notes In English. Based on Publisher- supplied data Ant. Acc. No: 85461. CRREL Acc. No: 63002070
Index Terms distribution; ice; ice floes; radar; remote sensing; thickness; velocity; Antarctica--East Antarctica; Antarctica--Lake Vostok; accreted ice; Antarctica; East Antarctica; ice penetrating radar; interferometry; International Polar Year 2007- 08; IPY 2007-08 Research Publications; Lake Vostok; radar methods; residence time; satellite methods; subglacial environment
Abstract The distribution and thickness of accreted ice at the ice-lake interface of subglacial Lake Vostok, East Antarctica, is calculated conflating various sources: (1) The modelled basal mass balance at the ice- lake interface based on two different bathymetry models, (2) different ice flow trajectories obtained from satellite interferometry and ice penetrating radar measurements, and (3) reasonable ice flow velocity. Our results show that the accreted ice distribution is highly sensitive to the ice draft and to the used flow line directions. The volume and thickness of the accreted ice depends significantly on the ice flow velocity. According to our modelling, we estimate the accreted ice area, volume and mean thickness to be 10,800 ± 500 km2, 980 ± 200 km3, and 90 ± 45 m, respectively, for an ice flow velocity of 3.6 m/a. (mod. journ. abst.)
URL http://hdl.handle.net/10.1029/2008GL033607
Publication Type journal article
Record ID 289622