Articles | Volume 14, issue 7
The Cryosphere, 14, 2159–2172, 2020
https://doi.org/10.5194/tc-14-2159-2020
The Cryosphere, 14, 2159–2172, 2020
https://doi.org/10.5194/tc-14-2159-2020

Research article 02 Jul 2020

Research article | 02 Jul 2020

Modeling the annual cycle of daily Antarctic sea ice extent

Mark S. Handcock and Marilyn N. Raphael

Model code and software

Tools for understanding the variability of climatic variables that experience an annual cycle M. S. Handcock, M. N. Raphael, and R. Fogt https://github.com/RaphaelLab/SeaIceVariation

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Short summary
Traditional methods of calculating the annual cycle of sea ice extent disguise the variation of amplitude and timing (phase) of the advance and retreat of the ice. We present a multiscale model that explicitly allows them to vary, resulting in a much improved representation of the cycle. We show that phase is the dominant contributor to the variability in the cycle and that the anomalous decay of Antarctic sea ice in 2016 was due largely to a change of phase.