Tritium, radiocarbon, 90Sr and 129I in the Pacific and Indian Oceans

P. P. Povinec, S. H. Lee, L. Liong Wee Kwong, B. Oregioni, A. J.T. Jull, W. E. Kieser, U. Morgenstern, Z. Top

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

Anthropogenic radionuclides have been widely used to investigate water circulation on regional and global scales. We observed that 3H, 14C, 90Sr and 129I concentrations in surface water of the Indian Ocean are similar to those measured in the North-western Pacific Ocean. This is due to the transport of water masses from the North-western Pacific via the Indonesian Seas to the Indian Ocean. The observed variations of radionuclide concentrations with latitude in the Indian Ocean are not due to deposition patterns of global fallout, but due to different water masses present in the region. Higher radionuclide concentrations observed in the South Indian Ocean in the latitudinal belt of 20-40°S are associated with the Indian Ocean Subtropical gyre, which acts as a reservoir of radionuclides.

Original languageEnglish (US)
Pages (from-to)1214-1218
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume268
Issue number7-8
DOIs
StatePublished - Apr 1 2010

Keywords

  • I
  • Indian Ocean
  • Pacific
  • Radiocarbon
  • Seawater
  • Tritium

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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