Physics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3221s09s&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 21, CiteID L21S09
Physics
4
Cryosphere: Ice Sheets, Cryosphere: Remote Sensing, Cryosphere: Dynamics, Geodesy And Gravity: Mass Balance (0762, 1223, 1631, 1836, 1843, 3010, 3322, 4532), Global Change: Cryospheric Change (0776)
Scientific paper
We analyze differences in ICESat elevation estimates at orbital crossover locations to determine short-term rates of elevation change for small regions within the Ross Embayment of the West Antarctic Ice sheet. A linear regression of crossover elevation difference against time difference gives an estimate of the mean elevation-change rate during the ICESat mission to date. We observe prevalent elevation change in the south, with uplift in the upstream end of Kamb Ice Stream at 0.24-0.30 m a-1, and thinning in the parts of Whillans Ice Stream, Mercer Ice Stream, and the adjacent Conway and Engelhardt ice ridges at 0.05-0.18 m a-1. These rates of elevation change are too large to be explained by the 0.02 -0.03 m a-1 formal regression error, by seasonal height variations, or by accumulation- or densification-rate variability, suggesting that they reflect real variations stemming from ice dynamics of the region.
Bentley Charles R.
Raymond Charles F.
Smith Benjamin E.
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