228Ra in the dead sea

Somayajulu, B. L. K. ; Rengarajan, R. (1987) 228Ra in the dead sea Earth and Planetary Science Letters, 85 (1-3). pp. 54-58. ISSN 0012-821X

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0012-821X(87)90020-3


The 228Ra concentrations of the Dead Sea waters range from 0.13 to 1.48 dpm kg−1, two to three orders of magnitude higher than those of ocean waters and lake waters. However, the 228Ra/226Ra activity ratios, (0.12-1.29)×10−2, are in the range reported for the hydrosphere. The surface waters of the Dead Sea are enriched in 228Ra by a factor of about three over the near-bottom waters. There is a factor of about two spatial variability in the mid-depth Ra concentrations at the two profile stations. The near-bottom 228Ra gradients yield vertical eddy diffusivity coefficient (K) of 2.0 and 0.4 cm2 s−1 at profile locations 1 and 2 respectively. These values are comparable to those measured in oceans and lakes.

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