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The small ice cap instability in diffusive climate models (1984)

North, G. R.

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Publication Date: 2011-08-19

Description: Simple climate models which invoke diffusive heat transport and ice cap albedo feedback have equilibrium solutions with no stable ice cap smaller than a radius of about 20 deg on a great circle. Attention is presently given to a solution of this phenomenon which is physically appealing. The ice-free solution has a thermal minimum, and if the minimum temperature is just above the critical value for ice formation, then the artificial addition of a patch of ice leads to a widespread depression of the temperature below the critical freezing temperature. A second stable solution will then exist whose spatial extent is determined by the range of the influence function of a point sink of heat, due to the albedo shift in the patch.

Keywords: METEOROLOGY AND CLIMATOLOGY

Type: Journal of the Atmospheric Sciences (ISSN 0022-4928); 41; 3390-339

Format: text

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