Accession Number : AD0644597

Title :   ARTIFICIAL RADIOACTIVITY REFERENCE HORIZONS IN GREENLAND FIRN.

Descriptive Note : Research rept.,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Crozaz,G. ; Langway,C. C. ; Picciotto,E.

Report Date : AUG 1966

Pagination or Media Count : 15

Abstract : 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 dpm/kg. The influx of artificial debris from the Ivy tests in 1953 is noted by a sharp rise in beta activity to 10 dpm/kg. Total 90Sr deposit to June 1964 is 9.3 plus or minus 1.5 millicuries/km2 (24 plus or minus 4 mC/mi2). Average 210Pb activity at time of deposit is 3.9 plus or minus 0.4 dpm/kg. (Author)

Descriptors :   (*GREENLAND, *ARTIFICIAL RADIOACTIVITY), (*SNOW, GREENLAND), STRATIGRAPHY, NATURAL RADIOACTIVITY, BETA PARTICLES, STRONTIUM, FALLOUT

Subject Categories : Snow, Ice and Permafrost
      Radioactiv, Radioactive Wastes & Fission Prod

Distribution Statement : APPROVED FOR PUBLIC RELEASE