The uncertain future of the Antarctic Ice Sheet

@article{Pattyn2020TheUF,
  title={The uncertain future of the Antarctic Ice Sheet},
  author={Frank Pattyn and Mathieu Morlighem},
  journal={Science},
  year={2020},
  volume={367},
  pages={1331 - 1335}
}
The Antarctic Ice Sheet is losing mass at an accelerating pace, and ice loss will likely continue over the coming decades and centuries. Some regions of the ice sheet may reach a tipping point, potentially leading to rates of sea level rise at least an order of magnitude larger than those observed now, owing to strong positive feedbacks in the ice-climate system. How fast and how much Antarctica will contribute to sea level remains uncertain, but multimeter sea level rise is likely for a mean… 
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47 Citations
Background Citations
15
Methods Citations
1

47 Citations

Citation Type

Citation Type

Ice sheets, glaciers, and sea level
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References

SHOWING 1-10 OF 50 REFERENCES
Collapse of the West Antarctic Ice Sheet after local destabilization of the Amundsen Basin
TLDR
Simulation of the long-term evolution of the West Antarctic Ice Sheet shows that in the Parallel Ice Sheet Model, a local destabilization causes a complete disintegration of the marine ice in West Antarctica, causing a global sea-level rise of about 3 m.
The multi-millennial Antarctic commitment to future sea-level rise
TLDR
A coupled ice-sheet/ice-shelf model is used to show that if atmospheric warming exceeds 1.5 to 2 degrees Celsius above present, collapse of the major Antarctic ice shelves triggers a centennial- to millennial-scale response of the Antarctic ice sheet in which enhanced viscous flow produces a long-term commitment to sea-level rise.
Trends and connections across the Antarctic cryosphere
TLDR
This paper discusses how Antarctic ice has changed over recent decades, and how these changes have been recorded in satellite observations.
The Greenland and Antarctic ice sheets under 1.5 °C global warming
Even if anthropogenic warming were constrained to less than 2 °C above pre-industrial, the Greenland and Antarctic ice sheets will continue to lose mass this century, with rates similar to those…
Contribution of Antarctica to past and future sea-level rise
TLDR
A model coupling ice sheet and climate dynamics—including previously underappreciated processes linking atmospheric warming with hydrofracturing of buttressing ice shelves and structural collapse of marine-terminating ice cliffs—is calibrated against Pliocene and Last Interglacial sea-level estimates and applied to future greenhouse gas emission scenarios.
Potential sea-level rise from Antarctic ice-sheet instability constrained by observations
TLDR
It is suggested that upper-bound estimates from low-resolution models and physical arguments are implausible under current understanding of physical mechanisms and potential triggers of marine-ice-sheet instability.
Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets
Many glaciers along the margins of the Greenland and Antarctic ice sheets are accelerating and, for this reason, contribute increasingly to global sea-level rise. Globally, ice losses contribute ∼1.8…
Slowdown in Antarctic mass loss from solid Earth and sea-level feedbacks
TLDR
A new global simulation of Antarctic evolution at high spatiotemporal resolution is presented that captures solid-Earth processes stabilizing and destabilizing ice sheets and demonstrates how in Antarctica, TG is particularly prone to negative feedback from SAL and elastic uplift.
Potential Antarctic Ice Sheet retreat driven by hydrofracturing and ice cliff failure
Uncertainty quantification of the multi-centennial response of the Antarctic ice sheet to climate change
Abstract. Ice loss from the Antarctic ice sheet (AIS) is expected to become the major contributor to sea level in the next centuries. Projections of the AIS response to climate change based on…
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