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In the recent geological past, temperature and atmospheric COconcentrations have been coupled: Cooling generally coincides with low COand warming with high COconcentrations. However, some geological records indicate that in the more distant geological past, temperature and COmay have been uncoupled. Such temperature-COuncoupling, if confirmed by further studies, may influence our ideas about climate-forcing mechanisms and about functioning of paleoecosystems.
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Sharon A. Cowling (1999) studied this question.
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