On the isotopic composition of carbon in soil carbon dioxide

Thure E. Cerling, D. Kip Solomon, Jay Quade, John R. Bowman

Research output: Contribution to journalArticle

516 Scopus citations

Abstract

In this study it is shown that the isotopic composition of carbon in soil CO2 differs from the isotopic composition of carbon in soil-respired CO2. Soil CO2 collected from a montane soil has an endmember δ13C value of -23.3%. whereas soil-respired CO2 in this system has a δ 13C value of -27.5%. This difference is very close to the theoretical difference of 4.4%. which is predicted by the difference in the diffusion coefficients for 12CO2 and 13CO2. Because of the measured and the theoretical difference between the isotopic composition of carbon in soil CO2 and soil-respired CO2 it is suggested that, in the future, a distinction should be made between them.

Original languageEnglish (US)
Pages (from-to)3403-3405
Number of pages3
JournalGeochimica et Cosmochimica Acta
Volume55
Issue number11
DOIs
StatePublished - Nov 1991
Externally publishedYes

ASJC Scopus subject areas

  • Geochemistry and Petrology

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