Climate's carbonate cypher

descriptionPublicationkeyboard_double_arrow_right Article 04 Dec 1997 English Publisher:Springer Science and Business Media LLCJournal:Nature, volume 390, pages 445-445 (issn: 0028-0836, eissn: 1476-4687,

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Authors: Philip Newton;

doi: 10.1038/37233

Climate's carbonate cypher

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Abstract

Clues to our past climate can be found in marine sediments. The ratios of different oxygen and carbon isotopes within the buried shells of marine creatures depend on water temperature, among other things. But it now seems that they also depend on the total concentration of carbonate in sea water. For many periods, these palaeoclimatic codes will now have to be deciphered again — lowering our estimate of temperatures during the last ice age, for example.

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