Cosmic ray produced silicon-32 in near-coastal waters

  • B. L. K. Somayajulu


The specific activity of Silicon-32 is measured is near-coastal seawaters using anin situ method for the extraction of dissolved silica. The results are discussed in relation to the input of Si32 at the surfacevia rains, the expected variation in its concentrations due to continental run-off and influx of open ocean surface waters. The experimental results clearly demonstrate the usefulness of Si32 as a tracer for the study of the vertical structure of the ocean in the upper layers, and of seasonal variations in the types of waters entering in the coastal regions.


Sponge Absolute Concentration Siliceous Sponge Biological Removal Sponge Matrix 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Lal, D...J. Oceanog. Soc. Japan, 1962,20, 600.Google Scholar
  2. 2.
    - ..International Oceanog. Congress, Moscow, 1966.Google Scholar
  3. 3.
    Kharkar, D. P., Lal, D. and Somayajulu, B. L. K.Proc. of Symp. on Radioactive Dating, 1963, p. 175.Google Scholar
  4. 4.
    -, -, Nijampurkar, V. N., Goldberg, E. D. and Koide, M.Inter. Oceanographic Congress, Moscow, 1966.Google Scholar
  5. 5.
    Schink, D. R. ..Ph.D. Thesis, 1962, UCSD, p. 178.Google Scholar
  6. 6.
    Lal, D., Arnold, J. R. and Somayajulu, B. L. K.Geochim. Cosmochim. Acta, 1964,28, 1111.CrossRefGoogle Scholar
  7. 7.
    Strickland, J. D. H. and Parsons, T. R.Bull. Fish. Res. Bd. Can., 1960,125, 55.Google Scholar
  8. 8.
    Kharkar, D. P., Nijampurkar, V. N. and Lal, D.Geochim. Cosmochim. Acta, 1966,60, 621.CrossRefGoogle Scholar
  9. 9.
    Schink, D. R...NAS-NS Monograph, 1968,3049 (Rev.), 74.Google Scholar
  10. 10.
    Lal, D. and Schink, D. R.Revs. of Sci. Instrum., 1960,31, 395.CrossRefGoogle Scholar
  11. 11.
    - and Somayajulu, B. L. K. In preparation, 1969.Google Scholar
  12. 12.
    Nijampurkar, V. N., Amin, B. S., Kharkar, D. P. and Lal, D.Nature, 1966,210, 478.CrossRefGoogle Scholar
  13. 13.
    Jayaraman, R...Indian J. Fish., 1954,1, 345.Google Scholar
  14. 14.
    Bien, G. S., Contois, D. E. and Thomas, W. H.Geochim. Cosmochim. Acta, 1958,14, 35.CrossRefGoogle Scholar
  15. 15.
    The Office of the Meteorological Department, Bombay-5 Personal communication.Google Scholar
  16. 16.
    Lal, D. and Somayajulu, B. L. K. In preparation, 1969.Google Scholar

Copyright information

© Indian Academy of Sciences 1969

Authors and Affiliations

  • B. L. K. Somayajulu
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombay-5

Personalised recommendations