Articles | Volume 12, issue 2
The Cryosphere, 12, 521–547, 2018
https://doi.org/10.5194/tc-12-521-2018
The Cryosphere, 12, 521–547, 2018
https://doi.org/10.5194/tc-12-521-2018

Research article 13 Feb 2018

Research article | 13 Feb 2018

Increased West Antarctic and unchanged East Antarctic ice discharge over the last 7 years

Alex S. Gardner et al.

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Cited articles

Allison, I. and Hyland, G.: Amery Ice Shelf compiled and merged ice thickness datasets, Australian Antarctic Data Centre, Metadata, available at: https://data.aad.gov.au/metadata/records/AIS_thickness_bottom (last access: 1 June 2016), 2010 (updated 2014).
Berthier, E., Scambos, T. A., and Shuman, C. A.: Mass loss of Larsen B tributary glaciers (Antarctic Peninsula) unabated since 2002, Geophys. Res. Lett., 39, L13501, https://doi.org/10.1029/2012GL051755, 2012.
Bindschadler, R. A. and Scambos, T. A.: Satellite-image-derived velocity field of an Antarctic ice stream, Science, 252, 242–246, 1991.
Blankenship, D. D., Kempf, S. D., and Young, D. A.: IceBridge HiCARS 2 L2 Geolocated Ice Thickness, Version 1, edited, NASA National Snow and Ice Data Center, Boulder, Colorado, USA, https://doi.org/10.5067/9EBR2T0VXUDG, 2012 (updated 2015).
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We map present-day Antarctic surface velocities from Landsat imagery and compare to earlier estimates from radar. Flow accelerations across the grounding lines of West Antarctica's Amundsen Sea Embayment, Getz Ice Shelf and the western Antarctic Peninsula, account for 89 % of the observed increase in ice discharge. In contrast, glaciers draining the East Antarctic have been remarkably stable. Our work suggests that patterns of mass loss are part of a longer-term phase of enhanced flow.