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Oxygen isotope fractionation in stratospheric CO 2
Author(s) -
Thiemens M. H.,
Jackson T.,
Mauersberger K.,
Schueler B.,
Morton J.
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl00121
Subject(s) - ozone , isotope , carbon dioxide , isotopes of carbon , environmental chemistry , oxygen 18 , isotopes of oxygen , isotope analysis , environmental science , carbon 13 , atmosphere (unit) , isotopic signature , carbon dioxide in earth's atmosphere , stable isotope ratio , fractionation , carbon fibers , chemistry , atmospheric sciences , meteorology , materials science , geology , total organic carbon , physics , nuclear chemistry , nuclear physics , oceanography , organic chemistry , composite number , composite material
A new cryogenic collection system has been flown on board a balloon gondola to obtain separate samples of ozone and carbon dioxide without entrapping major atmospheric gases. Precision laboratory isotopic analysis of CO 2 samples collected between 26 and 35.5km show a mass‐independent enrichment in both 17 O and 18 O of about 11 per mil (‰) above tropospheric values. Ozone enrichment in its heavy isotopes was 9 to 16% in 50 O 3 and 8 to 11% in 49 O 3 , respectively [Schueler et al., 1990]. A mechanism to explain the isotope enrichment in CO 2 has been recently proposed by Yung et al. [1991]. Their model is based on the isotope exchange between CO 2 and O 3 via O( 1 D), resulting in a transfer of the ozone isotope enrichment to carbon dioxide. Predicted enrichments and measured values agree well.