Secret NILU Radiation Charts, North America

NILU, Norwegian Institute for Air Research, had been providing regular updated maps using their unique methodology to forecast various types of radiation emitting from the Fukushima Daiichi nuclear power plant in Japan as it enters the atmosphere and travels around the globe.

The public updates have apparently ceased. The following message is displayed on some of their pages that I’ve browsed from older links…

Our apologies…
The item you requested does not exist on this server or cannot be served.

About NILU:
NILU 181 scientists, engineers and technicians carry out projects for the Research Council, for industry, both in Norway and offshore, and for local and state governments at home and abroad. NILU also takes an active part in EU research programs. NILU is among the leading research groups in the world in parts of their field.

Explanation regarding their modeling:
Weather conditions play an important role in the spread of air pollution. The path the pollution takes is determined by wind direction. The dilution depends on the wind strength and luftmassens mixing process. These factors in turn influenced by the topography which channels the wind, which affects the dilution in the atmosphere. Vertical exchanges are affected by radiation conditions, and the outer wind.

The development of numerical weather prediction models combined with measurements at the ground has led to better procedures for the preparation of the wind field. Wind fields are important input to diffusion models.

The combination of meteorological models and dispersion models have provided opportunities to establish notification procedures for the dissemination of air pollution in urban and regional scale.

Regarding the accuracy or validity of the NILU models that they have published of I-131, Cs-137 and others, I cannot say. It would be curious to hear Arnie Gundersen’s opinion on this.

In any event, a few blogs out there have uncovered a file folder location at the NILU site which still contains apparent updates, however they are not published publicly. I do not see a copyright notice. That, combined with their previous free distribution of their charts, I have chosen to post their latest available charts while knowing that many Readers here are interested in this subject.

The data is quoted in Bq, or becquerel (pronounced: ‘be-kə-rel) per square meter. One Bq is defined as the activity of a quantity of radioactive material in which one nucleus decays per second. One becquerel is one disintegration per second and is an extremely small amount of radioactivity. When measuring radioactivity of a sample with a detector, a unit of “counts per second” (cps) or “counts per minute” (cpm) is often used. These units can be converted to the absolute activity of the sample in Bq if one applies a number of conversions.

NILU Radiation Map of North America, I-131

NILU Radiation Map of North America, Cs-137

NILU Radiation Map of Europe, I-131

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  1. Can you access the European maps? My lettuce in in a greenhouse but I am beginning to wonder whether I should bin the spinach (which is outside).

    Ooh, I’ve just thought, what type of radiation does Iodine emit? The greenhouse would block alpha and beta particles, but not gamma… The greenhouse is watered via rainwater too so that isn’t great. Mind you, tap water probably isn’t much better.

    1. @Cathy, I believe that I-131 is mostly an alpha/beta radiation – meaning it has to be physically ingested to cause you eventual harm. So, your greenhouse would be fairly ‘clean’ unless winds are blowing through windows ;)

      Tomorrow I’ll look for EU maps, which I did see when I searched this morning.

    1. Thanks for that Europe map, Ken… There is less Iodine on it than I was expecting actually, presumably because of it’s short half life.

      So I am pleased to find that my food is probably only moderately irradiated, what a world we live in! :-/

  2. If the NILU charts are stochastic models based on weather predictions then it wouldn’t surprise me that some of the charts they have on this private folder are predictions that came out “too high” and aren’t included because the trends found by those models cannot be supported based on independent monitoring.

    Of course, they also probably use EPA stations data … and we all know how the EPA would react to this …

    And who can blame them? On one hand, with such a massive amount of radiation that is released, if these worst case models are true, what can we really do? If they released those maps as truth, you’d see probably more murders and pandemonium as people freak out than the gradual number of deaths and statistical rise in issues from long term radiation poisoning. Cold, hard numbers.

    I just don’t know anymore. Nothing is black and white.

  3. I am Japanaese who lives in Tokio
    I have refered radiation charts since 3.11
    however it not seeems have published anymore.

    If you have any information of the recent NILU radiation charts in Japan,
    please let me know the site.
    Now we could not find recent situation on the web


  4. The data must be made public, so every person can make informed choices as to what and whom they support; not knowing just makes it easier for problems of this nature to escalate. We are exposed to the risks, so we have a right to know. If everyone knew the degree of the problem, all nuclear reactors would be decommissioned worldwide and mining of these dangerous substances would also be stopped.

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