To assess the uncertainty of meteorological simulations in the transport and deposition of
radio‐Cs release associated with the Fukushima Daiichi Nuclear Power Station accident in
Japan, a multiple meteorological model and module ensemble analysis with a single
chemical transport model (CTM) was conducted. Although several multimodel ensemble
studies have previously been performed, the current type (ie, one CTM with several
meteorological fields) was applied for the first time and represents a useful way to evaluate …

The dispersion and deposition of radio‐cesium (137Cs) carried by two types (type A and
type B) of water‐insoluble Cs‐bearing solid microparticles (CsMPs) released due to the
Fukushima nuclear accident were simulated for the first time. The presence of type B CsMPs
(70–400 μm found in soil and 1–5 μm found in air), associated with the hydrogen explosion
of Unit 1 in the afternoon of March 12, could partly explain the simulated underestimation of
total deposition over land by assuming that 100% of the Cs carriers were water‐soluble …