Mathematics – Logic
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112403s&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 12, CiteID L12403
Mathematics
Logic
2
Geodesy And Gravity: Ocean/Earth/Atmosphere Interactions (3339), Hydrology: Glaciology (1863), Information Related To Geographic Region: Antarctica, Information Related To Geologic Time: Cenozoic, Meteorology And Atmospheric Dynamics: Polar Meteorology
Scientific paper
The spatial variation in ice accumulation is critical to the form and stability of ice sheets. In West Antarctica, knowledge of present ice accumulation rates is restricted to sparse measurements and interpolations across data free regions, while information on former ice accumulation is restricted to a small number of ice cores and numerical modeling results. Here, isochronous internal ice sheet layers, recorded by airborne radio-echo sounding and dated at their stratigraphic position at the Byrd ice core site, are used to reconstruct the spatial pattern of accumulation across the main West Antarctic ice divide for the past 16,000 years. Mean accumulation calculated for the last 3100 years matches well to present-day accumulation rates, which is compatible with previous observations on Siple Dome. Accumulation between 6400 and 16,000 years ago is calculated to be around half that at present, in accordance with recent ice sheet modeling results.
Payne Antony J.
Siegert Martin J.
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