Phosphorus cosmogenic

Benitez-Nelson, C.R., and Karl, D.M. (2002) Phosphorus cycling in the North Pacific Subtropical Gyre using cosmogenic 32P and 33P. Limnol. Oceanogr. 47, 762-770. 

Of the isotopes listed in Table 2 the study of the cosmogenic isotopes of phosphorus (half-life = 14.3 d) and (half-life = 25.3 d) provides insights into the residence time of aerosols in upper troposphere air because of the relatively short half-lives of the nuclides. Waser and Bacon (1995) measured the concentrations of P and P in precipitation at Bermuda over three seasons. They concluded that, with the average activity ratio of P to P of 0.96 and a production activity ratio of 0.7, the average residence time of aerosols in the upper troposphere was 40 d. This increase in the... 

Cosmogenic and as Tracers of Phosphorus Cycling in Surface Waters... 

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