Publications by authors named "Pierre-Alexis Chaboche"
Article Synopsis
- Following the 2011 Fukushima disaster, Japan's government started a decontamination program focusing on decontaminating Cs-contaminated topsoil in farmland and residential areas, but largely ignored forests, which make up 70% of the affected regions.
- A study analyzed sediment from the Mano Dam reservoir to understand how this decontamination impacted cesium (Cs) dynamics, finding increased sediment transfer and contributions from decontaminated areas after remediation, despite a drop in Cs activity.
- Post-decontamination, while contributions from cropland and "fresh soil" surged, forest contributions remained stable, leading to a Cs deposition flux similar to that during the previous five years of land abandonment.
Cs is a long-lived man-made radionuclide introduced in the environment worldwide at the early beginning of the nuclear Era during atmospheric nuclear testing's followed by the civil use of nuclear energy. Atmospheric fallout deposition of this major artificial radionuclide was reconstructed at the scale of French large river basins since 1945, and trajectories in French nuclearized rivers were established using sediment coring. Our results show that Cs contents in sediments of the studied rivers display a large spatial and temporal variability in response to the various anthropogenic pressures exerted on their catchment.
View Article and Find Full Text PDFAtmospheric nuclear tests (1945-1980) have led to radioactive fallout across the globe. French tests in Polynesia (1966-1974) may influence the signature of fallout in South America in addition to those conducted by USA and former USSR until 1963 in the Northern hemisphere. Here, we compiled the Pu/Pu atom ratios reported for soils of South America and conducted additional measurements to examine their latitudinal distributions across this continent.
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