226Ra, 210Pb and 210Po disequilibria in the western North Pacific

Details 226Ra, 210Pb and 210Po disequilibria in the western North Pacific 226Ra, 210Pb and 210Po disequilibria in the western North Pacific

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..32..313n&link_type=abstract

Earth and Planetary Science Letters, Volume 32, Issue 2, p. 313-321.

Physics

12

Scientific paper

226Ra, 210Pb and 210Po were measured in oceanic profiles at two stations near the Bonin and Kurile trenches. 210Po is depleted by 50% on average relative to 210Pb in the surface water. In the deep water, 210Pb is about 25% deficient relative to 226Ra. Based on the deficiency, 210Pb residence time with respect to removal by particulate matter was estimated to be less than 96 years in the deep water. 210Pb deficiency in the bottom water was significantly greater than that of the adjacent deep water, indicating more effective removal near or at the bottom interface. 210Pb, 210Po and Th appear to have similar overall rate constants of particulate removal throughout the water column.

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