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In reply to the discussion: Fukushima radiation found in California kelp [View all]suffragette
(12,232 posts)From a longer article:
http://www.scientificamerican.com/article.cfm?id=radioactive-iodine-from-from-fukushima-found-in-california-kelp&page=2
In Southern California, the kelp was collected after rainstorms, which would have washed the radioactive material from the air onto land and then into the ocean.
Other sites that were measured including Orange Countys Laguna Beach and Crystal Cove were less contaminated than Corona del Mar, since the latter gets urban runoff via a creek that winds through much of Orange County.
A whole confluence of things were happening. Youve got this plume that moves along, and then when it rains, thats when the material comes out in the rain, Manley said.
And from page 1 of this article:
The scientists only measured iodine 131, although other isotopes were in the plume from Japan that also accumulate in kelp. One of them, Cesium 137, has a 30-year half-life.
Hmm, that kelp was not the only matter being rained on at the time (says the soggy Seattleite), nor was California the only locale.