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Progress in Earth and Planetary Science
Fig. 6 | Progress in Earth and Planetary Science

Fig. 6

From: Atmospheric radioactivity over Tsukuba, Japan: a summary of three years of observations after the FDNPP accident

Fig. 6

Exponential fitting of the decreasing monthly 137Cs deposition trend since March 2011 at the MRI. The curve is composed of three exponential functions. These are attributable to the decreasing intensity of primary emission, tropospheric aerosol residence and re-suspension. The arrow shows the month during which an anomalous 90Sr deposition was observed. Possible causes are mentioned in the text

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