Observation of a mass independent oxygen isotopic composition in terrestrial stratospheric CO2, the link to ozone chemistry, and the possible occurrence in the Martian atmosphere

Details Observation of a mass independent oxygen isotopic composition in terrestrial stratospheric CO2, the link to ozone chemistry, and the possible occurrence in the Martian atmosphere Observation of a mass independent oxygen isotopic composition in terrestrial stratospheric CO2, the link to ozone chemistry, and the possible occurrence in the Martian atmosphere

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22..255t&link_type=abstract

Geophysical Research Letters, Volume 22, Issue 3, p. 255-258

Physics

35

Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Planetology: Solid Surface Planets: Atmospheres-Composition And Chemistry

Scientific paper

Multi-isotope (δ17O and δ18O) measurements of stratospheric CO2 and 14CO are reported. Samples were acquired from altitudes in excess of 11.5 km from Christchurch, New Zealand to the South Pole. A mass independent isotopic variation is observed in CO2, the magnitude of which correlates well with 14CO concentration, indicating a stratospheric source of the effect. The component arises from isotopic exchange between the product of O3 photolysis, O(1D) and CO2 thus providing a unique measure of ozone photolysis and turnover. A similar process may occur in the Martian atmosphere, as suggested by water isotopic measurements from SNC meteorites.

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