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Updated 11 November 2004

Consequences Vol. 2, No. 1, Winter 1996









Figure 4 Concentrations of atmospheric greenhouse gases (in parts per billion by volume) over the last 50,000 years, compared to estimated changes in air temperature at high latitudes over the same period (bottom curve), derived from analyses of an ice core from Antarctica. After M. Leuenberger and U. Siegenthaler, Nature, vol 360, pp 449-451, 1992

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