A Nova Scotia research scientist has told a scientific conference that isotopes for cesium-134 and cesium-137 have been identified west of Vancouver.
John Smith, who is with the Canadian government's Bedford Institute of Oceanography, told the American Geophysical Union meeting in Honolulu that levels are far lower than the Canadian limit for drinking water, according to a story on LiveScience.com.
Smith explained that cesium-134 has a half-life of two years, making it an "unequivocal" indication of ocean contamination from the Fukushima nuclear disaster, which occurred after an earthquake on March 11, 2011 in northeastern Japan.
Cesium-137 has a half-life of 30 years.
Models suggest that concentrations of radioactive water along the West Coast will peak in 2016.