Articles | Volume 30, issue 3
https://doi.org/10.5194/npg-30-299-2023
https://doi.org/10.5194/npg-30-299-2023
Research article
 | 
21 Jul 2023
Research article |  | 21 Jul 2023

An approach for projecting the timing of abrupt winter Arctic sea ice loss

Camille Hankel and Eli Tziperman

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Cited articles

Abbot, D. S. and Tziperman, E.: Sea ice, high-latitude convection, and equable climates, Geophys. Res. Lett., 35, L03702, https://doi.org/10.1029/2007GL032286, 2008. a, b
Abbot, D. S., Walker, C., and Tziperman, E.: Can a convective cloud feedback help to eliminate winter sea ice at high CO2 concentrations?, J. Climate, 22, 5719–5731, https://doi.org/10.1175/2009JCLI2854.1, 2009. a
An, S.-I., Kim, H.-J., and Kim, S.-K.: Rate-Dependent Hysteresis of the Atlantic Meridional Overturning Circulation System and Its Asymmetric Loop, Geophys. Res. Lett., 48, e2020GL090132, https://doi.org/10.1029/2020GL090132, 2021. a, b, c, d, e
Armour, K., Eisenman, I., Blanchard-Wrigglesworth, E., McCusker, K., and Bitz, C.: The reversibility of sea ice loss in a state-of-the-art climate model, Geophys. Res. Lett., 38, L16705, https://doi.org/10.1029/2011GL048739, 2011. a
Baer, S. M., Erneux, T., and Rinzel, J.: The slow passage through a Hopf bifurcation: delay, memory effects, and resonance, SIAM J. Appl. Math., 49, 55–71, 1989. a, b
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We present a novel, efficient method for identifying climate tipping point threshold values of CO2 beyond which rapid and irreversible changes occur. We use a simple model of Arctic sea ice to demonstrate the method’s efficacy and its potential for use in state-of-the-art global climate models that are too expensive to run for this purpose using current methods. The ability to detect tipping points will improve our preparedness for rapid changes that may occur under future climate change.