Abstract : Significant variations in the isotopic composition of marine calcium have occurred over the last 80 million years. These variations reflect deviations in the balance between inputs of calcium to the ocean from weathering and outputs due to carbonate sedimentation, processes that are important in controlling the concentration of carbon dioxide in the atmosphere and, hence, global climate. The calcium isotopic ratio of paleo-seawater is an indicator of past changes in atmospheric carbon dioxide when coupled with determinations of paleo-pH.
Type de document :
Article dans une revue
Science, American Association for the Advancement of Science, 2000, 289, pp.1176-1178
http://hal.univ-brest.fr/hal-00509461
Contributeur : Christina De La Rocha
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Soumis le : jeudi 12 août 2010 - 15:30:48
Dernière modification le : jeudi 11 janvier 2018 - 06:22:24
Christina De La Rocha, Donald Depaolo. Isotopic Evidence for Variations in the Marine Calcium Cycle Over the Cenozoic. Science, American Association for the Advancement of Science, 2000, 289, pp.1176-1178. 〈hal-00509461〉
