A wideband radar for high-resolution mapping of near-surface internal layers in glacial ice
作者： P. Kanagaratnam , S.P. Gogineni , V. Ramasami , D. Braaten
关键词: Snow 、 Glacier 、 Radar imaging 、 Sea ice thickness 、 Ice sheet 、 Meltwater 、 Ice core 、 Mineralogy 、 Geology 、 Glaciology 、 Remote sensing
摘要: Snow accumulation rate is an important parameter in determining the mass balance of polar ice sheets. Accumulation currently determined by analyzing cores and snow pits. Inadequate sampling spatial variations sheet has resulted uncertainties as large 24%. We designed developed a 600-900-MHz airborne radar system for high-resolution mapping near-surface internal layers estimating Our can provide improved temporal coverage continuous profile isochronous sheet. During 2002 field season Greenland, we successfully mapped to depth 200 m dry-snow zone, 120 percolation 20 melt zone. water equivalent at NASA-U/spl I.bar/1 site be 34.9/spl plusmn/5.1 cm/year from 1964 1992. This close agreement with ice-core derived 34.6 same period.
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