ARTIFICIAL RADIOACTIVITY REFERENCE HORIZONS IN GREENLAND FIRN.
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Pagination or Media Count:
Total beta measurements have been made on melt water samples from a stratigraphically dated firn core profile from the inland Greenland ice sheet 77 deg 10 min N, 61 deg 08 min W. A marked increase in radioactivity is found in the 1953 firn layer which corresponds to the first important fallout from nuclear test bombs. The pre-1953 natural beta activity is 5 dpmkg. The influx of artificial debris from the Ivy tests in 1953 is noted by a sharp rise in beta activity to 10 dpmkg. Total 90Sr deposit to June 1964 is 9.3 plus or minus 1.5 millicurieskm2 24 plus or minus 4 mCmi2. Average 210Pb activity at time of deposit is 3.9 plus or minus 0.4 dpmkg. Author
- Snow, Ice and Permafrost
- Radioactivity, Radioactive Wastes and Fission Products