Physics
Scientific paper
Sep 1954
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1954gecoa...6...65d&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 6, Issue 2-3, pp.65-78
Physics
16
Scientific paper
High altitude air samples collected in glass bulbs during balloon flights up to heights of 87,000 ft were found to contain oxygen with a normal isotope ratio, deviations less than ±0·05%. Air samples collected in Aerobee rockets up to altitudes of 51·6 km contained nitrogen having a normal isotope ratio, deviations less than ±0·15%. The oxygen of the rocket samples contained a higher percentage of O 18 than normal, but when an estimated correction was applied for the preferential loss of O 16 by clean-up of oxygen by the steel collecting tanks, the O 18 percentage of the oxygen in air at 51·6 km was normal to ±0·3%. Air collected at ground level in a number of locations all over the world contained oxygen having a normal isotope ratio to ±0·025%. Air pumped out of ocean water at different depths in the Pacific Ocean contained oxygen having a higher O 18 percentage than normal; the less the percentage of oxygen in the sample, the greater was the O 18 percentage. The oxygen isotope fractionation factor for the process consuming dissolved oxygen was 0·991. The nitrogen isotope ratio in dissolved ocean air was normal. The oxygen isotope fractionation factor for the clean-up or chemisorption of oxygen by steel was 1·026, while the factor was 1·061 for the clean-up of oxygen by copper.
Dole Malcolm
Lane G. A.
Rudd D. P.
Zaukelies D. A.
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