Articles | Volume 10, issue 2
The Cryosphere, 10, 811–823, 2016
https://doi.org/10.5194/tc-10-811-2016
The Cryosphere, 10, 811–823, 2016
https://doi.org/10.5194/tc-10-811-2016

Research article 15 Apr 2016

Research article | 15 Apr 2016

Constraining variable density of ice shelves using wide-angle radar measurements

Reinhard Drews et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Reinhard Drews on behalf of the Authors (07 Mar 2016)  Author's response    Manuscript
ED: Publish subject to minor revisions (Editor review) (15 Mar 2016) by Robert Bingham
AR by Reinhard Drews on behalf of the Authors (19 Mar 2016)  Author's response    Manuscript
ED: Publish as is (31 Mar 2016) by Robert Bingham
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Short summary
The thickness of ice shelves is typically inferred using hydrostatic equilibrium which requires knowledge of the firn density. Here, we infer density from wide-angle radar using a novel algorithm including traveltime inversion and ray tracing. We find that firn is denser inside a 2 km wide ice-shelf channel which is confirmed by optical televiewing of two boreholes. Such horizontal density variations must be accounted for when using the hydrostatic ice thickness for determining basal melt rate.