Helium concentration in the earth's lower atmosphere

Details Helium concentration in the earth's lower atmosphere Helium concentration in the earth's lower atmosphere

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.1759o&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 48, Sept. 1984, p. 1759-1767.

Computer Science

8

Atmospheric Composition, Helium Isotopes, Lower Atmosphere, Air Sampling, Mass Spectroscopy

Scientific paper

A 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.

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