Articles | Volume 11, issue 6
The Cryosphere, 11, 2655–2674, 2017
https://doi.org/10.5194/tc-11-2655-2017
The Cryosphere, 11, 2655–2674, 2017
https://doi.org/10.5194/tc-11-2655-2017

Research article 21 Nov 2017

Research article | 21 Nov 2017

GPS-derived estimates of surface mass balance and ocean-induced basal melt for Pine Island Glacier ice shelf, Antarctica

David E. Shean et al.

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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by David Shean on behalf of the Authors (06 Jul 2017)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (12 Jul 2017) by G. Hilmar Gudmundsson
RR by Laurence Padman (26 Jul 2017)
RR by Anonymous Referee #1 (02 Aug 2017)
ED: Publish subject to minor revisions (Editor review) (20 Aug 2017) by G. Hilmar Gudmundsson
AR by David Shean on behalf of the Authors (22 Sep 2017)  Author's response    Manuscript
ED: Publish as is (29 Sep 2017) by G. Hilmar Gudmundsson
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Short summary
We used long-term GPS data and interferometric reflectometry (GPS-IR) to measure velocity, strain rate and surface elevation for the PIG ice shelf – a site of significant mass loss in recent decades. We combined these observations with high-res DEMs and firn model output to constrain surface mass balance and basal melt rates. We document notable spatial variability in basal melt rates but limited temporal variability from 2012 to 2014 despite significant changes in sub-shelf ocean heat content.