Glaciological Observations on the Ross Ice Shelf Near Scott Base, Antarctica

Abstract On the Ross Ice Shelf near Scott Base the annual surface snow accumulation is about 18 g.cm. −2 . The increase of firn density with depth is greater than normal, due to horizontal compaction. Where the bottom of the ice shelf has a density less than 0.8 g.cm. −3 the shelf becomes brine-soak...

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Bibliographic Details
Published in:Journal of Glaciology
Main Authors: Stuart, A. W., Bull, C.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1963
Subjects:
Earth-Surface Processes
Ross Ice Shelf
McMurdo Ice Shelf
Scott Base
Antarc*
Antarctica
Ice Shelf
Journal of Glaciology
Online Access:http://dx.doi.org/10.1017/s0022143000027829
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000027829
Description
Summary:Abstract On the Ross Ice Shelf near Scott Base the annual surface snow accumulation is about 18 g.cm. −2 . The increase of firn density with depth is greater than normal, due to horizontal compaction. Where the bottom of the ice shelf has a density less than 0.8 g.cm. −3 the shelf becomes brine-soaked by vertical infiltration. The bottom of the shelf is melting, at about 44 g.cm. −2 yr. −1 where the bottom is impermeable ice and 73 g.cm. −2 yr. −1 where the bottom is permeable firn. Surface velocities at 40 points within 30 km. of Scott Base vary between 4 and 840 m.yr. −1 . From the pattern of velocities, ice thicknesses and surface features, a transition zone is delineated, separating the Ross Ice Shelf from the “McMurdo Ice Shelf”.

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