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View Diary: Fukushima Radionuclides in Pacific Albacore Tuna Off the US Coast (24 comments)

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  •  Hi Jim P (2+ / 0-)
    Recommended by:
    northstarbarn, Jim P

    It takes time and resources to make measurements so I think it is unreasonable to fault the scientific community for not being able to measure everything everywhere. Scientific understanding of the activities of Fukushima derived radionuclides is increasing incrementally.  If you would like to see more measurements made of more species I urge you to lobby your various levels of government to address the problem with more resources.

    That being said, as I indicated above, the Japanese have been making many measurements.  The Japanese Fisheries Agency has made over 39,000 as of November of last year which are detailed online here.  Not quite the 43,000 you have requested but certainly in the right ballpark.

    The percentage of fish registering more than 100 Bq/kg has dropped from 53% to ~2% since 2011 until November 2013 in Fukushima prefecture.  The percentage has dropped to less than 1% from 6.5% in the same time period in other prefectures.  All the data is available for download at the site. These concentrations of Cs in fish result from many orders of magnitude higher activities of Cs in the coastal waters off of Japan immediately after the disaster.  Such activities in seawater here will not occur based on modeling of plume transport and measurements being made in the North Pacific.  

    All available measurements of fish caught off of the west coast of North America thus far suggest that there is little radiological health risk due to Fukushima radionuclides.

    •  Hi MarineChemist (0+ / 0-)

      I don't blame anyone for having a small sample. I do think, however, that possessed of a small sample, one shouldn't mask public relations as science.

      Of course, my '43,000' is not scientifically-based, just a way to give a dramatic indication of the scales required to make any honest evaluation.

      We'll forget for a moment that Japan has engaged -- according to Mayors, Doctors, Hospital Managers, former Prime Ministers and Diet members, Journalists -- in a massive suppression of evidence, and instead let's accept Fisheries' studies as being complete and truthful.

      Again, we are back to averages versus specific cases. 'Averages' are the Achilles Heel of statistical studies.

      Averages can be massively deceptive, as you know. They can't really be relied upon in all areas of life, though they work in some.

      The plaint 'but this is the tool we have' is not the same thing as 'the tool is adequate to the purpose.' The reality that there's clustering of radiation from Fukushima makes appeal to averages weaker than stringent thought requires, imo.

      We can take the case of the infamous 'safe levels.' These are based on studies, and averages, of healthy males in their 20s. But we know that radioactivity has massively more impact on embryos, children (girls particularly), on women, on people with pre-existing troubles, and as some recent research might indicate -- genetic makeup! The standard often referred to is the one which doesn't apply to the majority of humanity.

      Thanks for taking time to answer.


      A government is a body of people usually notably ungoverned. -- Firefly

      by Jim P on Tue Apr 29, 2014 at 09:02:27 PM PDT

      [ Parent ]

      •  Hi Jim P (3+ / 0-)
        Recommended by:
        northstarbarn, T100R, nojay

        All the evidence suggests that the activity of Cs from Fukushima has been decreasing with time in fish caught off the Japanese coast.  Most recent measurements here for Jan. 2014 show 1.6% of ~2000 fish caught at Fukushima prefecture were > 100 Bq/kg.  Effectively 0% from other prefectures exceeded that level (1 fish in ~2,200).  This in Japan where the activity of Cs is seawater from Japan is orders of magnitude greater than what we will experience in N. America.

        This is not a PR exercise but reporting real numbers as they are being generated.  The highest combined 134 and 137 Cs activities in the albacore and other species caught off the west coast are about 1 Bq/kg which result in very, very small doses to people who choose to consume fish.  They actually receive orders of magnitude higher doses from 210-Po naturally present in the fish.

      •  how exactly does Japan stop people from (1+ / 0-)
        Recommended by:
        T100R

        catching fish off the American West Coast and measuring the radioactivity in them.

        Please be as detailed as possible.

        In the end, reality always wins.

        by Lenny Flank on Wed Apr 30, 2014 at 05:04:39 AM PDT

        [ Parent ]

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