Monitoring information of environmental radioactivity level
Results of Airborne Monitoring in Restricted Areas and Deliberate Evacuation Areashttp://radioactivity.mext.go.jp/en/contents/5000/4709/view.html
Data was corrected under the algorithm developed by DOM and the space interpolation was done by IDW.
Simulation
1. 福島第一原子力発電所事故に伴うCs137の大気降下状況の試算（平成23年9月6日）(Japanese Only)
http://www.aec.go.jp/jicst/NC/iinkai/teirei/siryo2011/siryo34/siryo2.pdf
2. Cesium-137 deposition and contamination of Japanese soils due to the Fukushima nuclear accident
Teppei J. Yasunari,1, Andreas Stohl, Ryugo S. Hayano, John F. Burkhart, Sabine Eckhardt, and Tetsuzo Yasunari
http://www.pnas.org/content/108/49/19530.fullPress Release (Japanese)
http://www.nagoya-u.ac.jp/research/pdf/activities/20111115_hyarc.pdf?20111119
we estimate total 137Cs deposition by integrating daily observations of 137Cs deposition in each prefecture in Japan with relative deposition distribution patterns from a Lagrangian particle dispersion model, FLEXPART.
About FLEXPART
The FLEXPART model is a Lagrangian Particle Dispersion Model developed at the Norwegian Institute for Air Research in the Department of Atmospheric and Climate Research. The model development team consists of Andreas Stohl (who originally wrote FLEXPART), Sabine Eckhardt, Harald Sodemann, and John Burkhart.
FLEXPART was forced with the European Center for Medium-Range Weather Forecasts (ECMWF) operational analysis data with a global resolution of 1° × 1° and 0.18° × 0.18° for 120–168 °E and 25–50 °N. The output had a resolution of 0.2° × 0.2° and was recorded every 3 h (SI Text).http://transport.nilu.no/flexpart
Inputs/Outputs
FLEXPART needs five three-dimensional fields: horizon- tal and vertical wind components, temperature and specific humidity.
FLEXPART also needs the two-dimensional fields: sur- face pressure, total cloud cover, 10 m horizontal wind components, 2 m temperature and dew point temperature, large scale and convective precipitation, sensible heat flux, east/west and north/south surface stress, topography, land- sea-mask and subgrid standard deviation of topography.
Tracer concentrations and/or mixing ratios (for forward runs), or emission sensitivity response functions (for back- ward runs) are calculated on a three-dimensional longitude- latitude grid, defined in file OUTGRID, whose domain and resolution can differ from the grid on which meteorological input data are given. Two-dimensional wet and dry deposi- tion fields are calculated over the same spatial domain, and tracer mass fluxes can also be determined on the 3-d grid.
There are several output options in FLEXPART, which can all be selected in file COMMAND. Gridded output fields can be concentrations (files grid_conc_date), volume mixing ratios (files grid_pptv_date), emission response sensi- tivity in backward simulations (files grid_time_date), or fluxes (files grid_flux_date, unit 10−12 kg m−2 s−1 for forward runs).
FLEXPART output files, except for dates, are all binary and often contain many grid cells with zero concentrations (or mixing ratios, fluxes, etc.).Stohl, A., Forster, C., Frank, A., Seibert, P., and Wotawa, G.: Technical note: The Lagrangian particle dispersion model FLEXPART version 6.2, Atmos. Chem. Phys., 5, 2461-2474, doi:10.5194/acp-5-2461-2005, 2005.
http://www.atmos-chem-phys.net/5/2461/2005/acp-5-2461-2005.html
3. 福島第一原子力発電所事故に由来する空間放射線量率の将来予測と野生生物への影響予測(Japanese only)
斎藤昌幸・土光智子・小池文人
http://vege1.kan.ynu.ac.jp/lab/nc/