GIS supported calculations of (137)Cs deposition in Sweden based on precipitation data

The Science of the Total Environment
Sara AlmgrenMats Isaksson

Abstract

It is of interest to know the spatial variation and the amount of (137)Cs e.g. in case of an accident with a radioactive discharge. In this study, the spatial distribution of the quarterly (137)Cs deposition over Sweden due to nuclear weapons fallout (NWF) during the period 1962-1966 was determined by relating the measured deposition density at a reference site to the amount of precipitation. Measured quarterly values of (137)Cs deposition density per unit precipitation at three reference sites and quarterly precipitation at 62 weather stations distributed over Sweden were used in the calculations. The reference sites were assumed to represent areas with different quarterly mean precipitation. The extent of these areas was determined from the distribution of the mean measured precipitation between 1961 and 1990 and varied according to seasonal variations in the mean precipitation pattern. Deposition maps were created by interpolation within a geographical information system (GIS). Both integrated (total) and cumulative (decay corrected) deposition densities were calculated. The lowest levels of NWF (137)Cs deposition density were noted in north-eastern and eastern parts of Sweden and the highest levels in the western parts of S...Continue Reading

References

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Citations

Apr 6, 2012·Journal of Environmental Radioactivity·S E PálssonS P Nielsen
Jun 30, 2011·Environmental Monitoring and Assessment·Soheil Khoshbinfar, Masoud Vahabi Moghaddam
May 20, 2009·Journal of Environmental Radioactivity·Sara Almgren, Mats Isaksson
Aug 16, 2008·Journal of Environmental Radioactivity·Sara AlmgrenMats Isaksson
Oct 13, 2006·Journal of Environmental Radioactivity·S Almgren, M Isaksson

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