Local Changes in ⁹⁰Sr Deposition in the Soil as Observed in Hokkaido Island, Japan

Abstract

We observed cumulative amount of ⁹⁰Sr in soils on different parts of Hokkaido Island in 1958-1959.
The results show that the amount of ^9OSr deposition ranges from 3mc/km² (at Obihiro) to 32mc/km² (at Imagane).
There is a high correlation (r=+0.75) between the mean annual precipitations at sampling stations and the accumulations of ⁹⁰Sr.
It is necessary to investigate with regard to the change of accumulations of ⁹⁰Sr in soils and correlation between accumlations of ⁹⁰Sr and meteorological conditions.