Radium and barium at GEOSECS stations in the Atlantic and Pacific

Details Radium and barium at GEOSECS stations in the Atlantic and Pacific Radium and barium at GEOSECS stations in the Atlantic and Pacific

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..32..258c&link_type=abstract

Earth and Planetary Science Letters, Volume 32, Issue 2, p. 258-267.

Physics

13

Scientific paper

226Ra and Ba show a general linear correlation in the oceanic water column within the uncertainties of the data: the slope of the line is about 4.6 nanomoles (nmoles) Ra/mole Ba, the intercept being at about 4 nmoles Ba/kg. This demonstrates the usefulness of Ba as a ``chemical analogue'' of Ra. Box-model calculations indicate that the average deep-water excess of Ra over Ba should be about 10% relative to the surface. This is consistent with the observations outside the deep northeast Pacific. However, the uncertainties in the data are such that the regional variation in the primary input cannot be resolved. In the deep waters of the North Pacific there is in fact a large excess of Ra relative to Ba. The one detailed profile presently available (204) can be explained consistently by a simple vertical advection-diffusion model.

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