Articles | Volume 12, issue 1
https://doi.org/10.5194/tc-12-39-2018
https://doi.org/10.5194/tc-12-39-2018
Research article
 | 
08 Jan 2018
Research article |  | 08 Jan 2018

Influence of temperature fluctuations on equilibrium
ice sheet volume

Troels Bøgeholm Mikkelsen, Aslak Grinsted, and Peter Ditlevsen

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Cited articles

Abe-Ouchi, A., Saito, F., Kawamura, K., Raymo, M. E., Okuno, J., Takahashi, K., and Blatter, H.: Insolation-driven 100,000-year glacial cycles and hysteresis of ice-sheet volume, Nature, 500, 190–193, https://doi.org/10.1038/nature12374, 2013.
Abram, N. J., Mulvaney, R., Wolff, E. W., Triest, J., Kipfstuhl, S., Trusel, L. D., Vimeux, F., Fleet, L., and Arrowsmith, C.: Acceleration of snow melt in an Antarctic Peninsula ice core during the twentieth century, Nat. Geosci., 6, 404–411, https://doi.org/10.1038/NGEO1787, 2013.
Arnold, K. C. and MacKay, D. K.: Different methods of calculating mean daily temperatures, their effects on degree-day totals in the high Arctic and their significance to glaciology, Geogr. B., 123–129, 1964.
Barletta, V. R., Sørensen, L. S., and Forsberg, R.: Scatter of mass changes estimates at basin scale for Greenland and Antarctica, The Cryosphere, 7, 1411–1432, https://doi.org/10.5194/tc-7-1411-2013, 2013.
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Short summary
The atmospheric temperature increase poses a real risk of ice sheets collapsing. We show that this risk might have been underestimated since variations in temperature will move the ice sheets to the tipping point of destabilization. We show this by using a simple computer model of a large ice sheet and investigate what happens if the temperature varies from year to year. The total volume of the ice sheet decreases because a cold year followed by an equally warm year do not cancel out.