A dynamic marine calcium cycle during the past 28 million years
Science
By: E.M. Griffith, A. Paytan, K. Caldeira, T.D. Bullen, and E. Thomas
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Abstract
Multiple lines of evidence have shown that the isotopic composition and concentration of calcium in seawater have changed over the past 28 million years. A high-resolution, continuous seawater calcium isotope ratio curve from marine (pelagic) barite reveals distinct features in the evolution of the seawater calcium isotopic ratio suggesting changes in seawater calcium concentrations. The most pronounced increase in the ??44/40Ca value of seawater (of 0.3 per mil) occurred over roughly 4 million years following a period of low values around 13 million years ago. The major change in marine calcium corresponds to a climatic transition and global change in the carbon cycle and suggests a reorganization of the global biogeochemical system.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | A dynamic marine calcium cycle during the past 28 million years |
| Series title | Science |
| DOI | 10.1126/science.1163614 |
| Volume | 322 |
| Issue | 5908 |
| Year Published | 2008 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Science |
| First page | 1671 |
| Last page | 1674 |
| Google Analytic Metrics | Metrics page |