Figure 2
From: Radiocarbon Releases from the 2011 Fukushima Nuclear Accident
Temporal variations of 14C in tree-ring and atmospheric CO2.
The data points of the global atmospheric 14C values are the average value of May-August of the SIL11. Note that the SIL data points of 2013–2015 are extrapolated from the exponential fitting of 14C data in period 2000–2012. The data point of year 2011 ring in Futaba is shown as the average value with 1σ standard deviation of the six sub-rings, whereas that in Takase is the average value of the early and late-wood. The 1σ uncertainties of other samples are within the symbol point. The blue and dotted lines stand for the tree rings from Iwaki8 and Okuma9.
