World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Settlement Process of Radioactive Dust to the Ground Inferred from the Atmospheric Electric Field Measurement : Volume 30, Issue 1 (05/01/2012)

By Yamauchi, M.

Click here to view

Book Id: WPLBN0004002137
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Settlement Process of Radioactive Dust to the Ground Inferred from the Atmospheric Electric Field Measurement : Volume 30, Issue 1 (05/01/2012)  
Author: Yamauchi, M.
Volume: Vol. 30, Issue 1
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Yamauchi, M., Miyagi, I., Makino, M., Takeda, M., & Owada, T. (2012). Settlement Process of Radioactive Dust to the Ground Inferred from the Atmospheric Electric Field Measurement : Volume 30, Issue 1 (05/01/2012). Retrieved from

Description: Swedish Institute of Space Physics, Box 812, 98128 Kiruna, Sweden. Radioactive materials from the accident at Fukushima Dai-ichi nuclear power plant (FNPP) in March 2011 spread over a large area, increasing the atmospheric electric conductivity by their ionizing effect, and reducing the vertical (downward) component of the DC electric field near the ground, or potential gradient (PG). PG data at Kakioka, 150 km away from the FNPP, showed independent changes compared to the radiation dose rate, and a comparison of these data revealed the local dynamics of the radioactive dust.

(1) The initial drop of the PG to almost zero during 14–15 March is most likely due to radioactive dust suspended in the air near the ground during cloudy weather. (2) An episode of PG increase to more than 50 V m−1 on 16 March is most likely due to the re-suspension of the radioactive dust from the surface and subsequent removal from Kakioka by the strong wind from the non-contaminated area. (3) Low but finite values of the PG during 16–20 March most likely reflect a reduced amount of radioactive material near the ground after the above wind transported away the majority of the suspended radioactive dust. (4) Very low values of the PG after substantial rain on 20–22 March most likely reflect settlement of the radioactive material by rain-induced fallout. (5) Temporal recovery of daily variations from the end of March to the middle of April with low nighttime fair-weather baseline PG most likely reflects re-suspension of the radioactive dust into the air from the ground and trees, and subsequent transport to the other region or fallout to the ground until late April. (6) Weakening of the daily variation and gradual recovery of the nighttime fair-weather baseline after mid-April suggests a complete settlement of the radioactive material to the ground with partial migration to the subsurface.

Settlement process of radioactive dust to the ground inferred from the atmospheric electric field measurement

Hamilton, R. A. and Paren, J. G.: The influence of radioactive fallout on the atmospheric potential gradient, Meteorol. Mag., 96, 81–85, 1967.; Harris, D. L.: Effects of radioactive debris from nuclear explosions on the electrical conductivity of the lower atmosphere, J. Geophys. Res., 60, 45–52, 1955.; Harrison, R. G.: Twentieth century atmospheric electrical measurements at the observatories of Kew, Eskdalemuir and Lerwick, Weather, 58, 11–19, 2003.; IAEA: Environmental Consequences of the Chernobyl Accident and Their Remediation: Twenty Years of Experience, 181pp, International Atomic Energy Agency, Vienna,, 2006.; Israelsson, S. and Knudsen, E.: Effect of radioactive fallout from a nuclear power plant accident on electrical parameters, J. Geophys. Res., 91, 11909–11910, 1986.; Kondoh, A., Yamaguchi, H., Hayakawa, Y., and Shimojo, R.: Characteristics of dose rate distribution around Iitate-mura caused by the accidents of Fukushima Daiichi Nuclear Power stations, J. Rural Planning, 30, 121–122, 2011 (in Japanese).; Makino, M. and Ogawa, T.: Quantitative Estimation of Global Circuit, J. Geophys. Res., 90, 5961–5966, 1985.; MEXT: Distribution map of radiation dose around Fukushima Dai-ichi & Dai-Ni NPP, press release by Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan,, 2011.; NISA: The Accident at TEPCO's Fukushima nuclear power stations, Report of Japanese government to the IAEA ministerial conference on nuclear safety, 7 June 2011, chapter VI, press release by Nuclear and Industrial Safety Agency (NISA), Japan,, 2011.; Pierce, E. T.: Some calculations on radioactive fallout with especial reference to the secular variations in potential gradient at Eskdalemuir, Scotland, Pure Appl. Geophys., 42, 145–151, 1959.; Rosen, J. M. and Hofmann, D. J.: Balloon-borne measurements of electrical conductivity, mobility, and the recombination coefficient, J. Geophys. Res., 86, 7406–7410, 1981.; Rycroft, M. J., Israelsson, S., and Price, C.: The global atmospheric electric circuit, solar activity and climate change, J. Atmos. Sol. Terr. Phys, 62, 1563–1576, 2000.; Rycroft, M. J., Harrison, R. G., Nicoll, K. A., and Mareev, E. A.: An overview of Earth's global electric circuit and atmospheric conductivity, Space Sci. Rev., 137, 83–105, doi:10.1007/s11214-008-9368-6, 2008.; Shigeno, N., Takizawa, T., Itoh, N., Yokoyama, M., and Owada, T.: Preliminary test for atmospheric electricity measured using an electrostatic sensor, Gijutsu Hookoku, 112, 8–13, 2001.; Takeda, M., Yamauchi, M., Makino, M., and Owada, T.: Initial effect of the Fukushima accident on atmospheric electricity, Geophys. Res. Lett., 38, L15811, doi:10.1029/2011GL048511, 2011.; Tuomi, T. J.: Observations of atmospheric electricity 1986, Geophysical Publications, 7, 551.506.1, Finish Meteorological Institute, Helsinki, 61 pp., 1988.; Tuomi, T. J.: Ten Year Summary 1977-1986 of Atmospheric Electricity Measured at Helsinki-Vantaa Airport, Finland, Geophysica, 25, 1–20, 1989.; Williams, E. R.: The global electrical circuit: A review, Atmos. Res., 91, 140–152, doi:10.1016/j.atmosres.2008.05.018, 2009.; Yamauchi, M.: Secondary wind transport of radioactive materials after the Fukushima accident, Earth, Planet, Space, submitted, 2012.


Click To View

Additional Books

  • Radiation by Energetic Electrons Acceler... (by )
  • Daytime F2-layer Negative Storm Effect: ... (by )
  • Eiscat/Crres Observations: Nightside Ion... (by )
  • Longitudinal (Ut) Effect in the Onset of... (by )
  • Rocket-borne Investigation of Auroral Pa... (by )
  • Thinning and Expansion of the Substorm P... (by )
  • Integrated Water Vapor from Igs Ground-b... (by )
  • Meridional Thermospheric Neutral Wind at... (by )
  • Real-time 3-d Hybrid Simulation of Titan... (by )
  • A Model of So-called Zebra Emissions in ... (by )
  • Effective Co2 Lifetime and Future Co2 Le... (by )
  • The Local-time Variation of the Quiet Pl... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.