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Th-234 applied to particle removal rates from the surface ocean: A mathematical treatment revisited

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  • It has been recognized since the 1950's that radioisotopic disequilibrium between naturally occurring parent-daughter isotope pairs in seawater can provide information on the rate of processes segregating them. In the surface ocean, the U-238:Th-234 parent-daughter pair tends to display measurable disequilibrium that is attributable to the effects of scavenging on particle reactive thorium. A range of approaches has been applied to deriving quantitative information on particle scavenging and sinking rates from U-238:Th-234 measurements. Here, we review the mathematical underpinnings of a very basic conceptual model of the removal process in order to correct a misunderstanding that has arisen in recent literature.
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  • Alleau, Y., Colbert, D., Covert, P., Haley, B. A., Qiu, X., Collier, R. W., & Falkner, K. (2001). Th-234 applied to particle removal rates from the surface ocean: A mathematical treatment revisited [Electronic version]. Geophysical Research Letters, 28(14), 2855-2857.
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