Decadal trends in ¹³⁷Cs concentrations in the bark and wood of trees contaminated by the Fukushima nuclear accident.

ABSTRACT: Understanding the actual situation of radiocesium (¹³⁷Cs) contamination of trees caused by the Fukushima nuclear accident is essential for predicting the future contamination of wood. Particularly important is determining whether the ¹³⁷Cs dynamics within forests and trees have reached apparent steady state. We conducted a monitoring survey of four major tree species (Japanese cedar, Japanese cypress, konara oak, and Japanese red pine) at multiple sites. Using a dynamic linear model, we analyzed the temporal trends in ¹³⁷Cs activity concentrations in the bark (whole), outer bark, inner bark, wood (whole), sapwood, and heartwood during the 2011-2020 period. The activity concentrations were decay-corrected to September 1, 2020, to exclude the decrease due to

SUBMITTER: Ohashi S 

PROVIDER: S-EPMC9253084 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature