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Four decades of Antarctic Ice Sheet mass balance from 1979–2017

Open access
Rignot, Eric, Mouginot, Jérémie, Scheuchl, Bernd, van den Broeke, Michiel, van Wessem, Melchior J., Morlighem, Mathieu·2019·Proceedings of the National Academy of Sciences

Abstract

We use updated drainage inventory, ice thickness, and ice velocity data to calculate the grounding line ice discharge of 176 basins draining the Antarctic Ice Sheet from 1979 to 2017. We compare the results with a surface mass balance model to deduce the ice sheet mass balance. The total mass loss increased from 40 ± 9 Gt/y in 1979–1990 to 50 ± 14 Gt/y in 1989–2000, 166 ± 18 Gt/y in 1999–2009, and 252 ± 26 Gt/y in 2009–2017. In 2009–2017, the mass loss was dominated by the Amundsen/Bellingshausen Sea sectors, in West Antarctica (159 ± 8 Gt/y), Wilkes Land, in East Antarctica (51 ± 13 Gt/y), and West and Northeast Peninsula (42 ± 5 Gt/y). The contribution to sea-level rise from Antarctica averaged 3.6 ± 0.5 mm per decade with a cumulative 14.0 ± 2.0 mm since 1979, including 6.9 ± 0.6 mm from West Antarctica, 4.4 ± 0.9 mm from East Antarctica, and 2.5 ± 0.4 mm from the Peninsula (i.e., East Antarctica is a major participant in the mass loss). During the entire period, the mass loss concentrated in areas closest to warm, salty, subsurface, circumpolar deep water (CDW), that is, consistent with enhanced polar westerlies pushing CDW toward Antarctica to melt its floating ice shelves, destabilize the glaciers, and raise sea level.

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Metadata

Authors
Rignot, E., Mouginot, J., Scheuchl, B., van den Broeke, M., van Wessem, M. J., & Morlighem, M.
Venue
Proceedings of the National Academy of Sciences
Published
2019-01-14
Volume
116
Issue
4
Pages
1095-1103
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2908740848
Cited by
1,649
References
27
FWCI
76.06
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Four decades of Antarctic Ice Sheet mass balance from 1979–2017. https://app.cochat.ai/papers/10.1073/pnas.1812883116
The paper
Rignot, E., Mouginot, J., Scheuchl, B., van den Broeke, M., van Wessem, M. J., & Morlighem, M. (2019). Four decades of Antarctic Ice Sheet mass balance from 1979–2017. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1812883116

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