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An abrupt increase in the temperature in Greenland in the wake of the initiation of the Bolling-Allerod warm phase at ca. 15 cal kyr BP was followed after a few decades by a dramatic increase in the concentration of methane in the atmosphere of the Earth resulting from an increase in humidity in the tropics [J.P. Severinghaus, E.J. Brook, Science 286 (1999) 930-934]. Analysis of a sediment core from...
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