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Helium concentration in the earth's lower atmosphereA helium content of 5.222 + or - 0.017 ppm by volume has been established by measurements during 1981 of the earth's lower atmosphere, using isotope dilution mass spectrometry. This compares well with the currently accepted value of 5.239 + or - 0.004 ppm determined by Gluekhauf (1946) on the basis of measurements conducted in the 1930s. While processes that could have altered helium concentrations since the 1930s imply a significant increase in concentration, due to helium release during natural gas production, possible net helium losses from the atmosphere are not easily quantifiable.
Document ID
19850029872
Document Type
Reprint (Version printed in journal)
Authors
Oliver, B. M. (Rockwell International Corp. Canoga Park, CA, United States)
Farrar, H. (Rockwell International Corp. Canoga Park, CA, United States)
Bradley, J. G. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena; Rockwell International Corp. Canoga Park, CA, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1984
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 48
ISSN: 0016-7037
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: DE-AT03-81SF-11561
Distribution Limits
Public
Copyright
Other