The stable isotopic composition and measurement of carbon in soil CO 2

Details The stable isotopic composition and measurement of carbon in soil CO 2 The stable isotopic composition and measurement of carbon in soil CO 2

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995gecoa..59.2485d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 59, Issue 12, pp.2485-2489

Statistics

Methodology

7

Scientific paper

The theoretical minimum difference between the 13 C of soil CO 2 (a concentration) and soil-respired CO 2 (a flux) was previously thought to be 4.4 . It is shown here that the difference is a function of the 13 C of soil-respired CO 2 , with possible minimum values less than 4.4 . A simple equation is given which allows the 13 C of soil CO 2 or soil-respired CO 2 to be calculated from four measurable variables. Sampling methodology is investigated demonstrating the need for correcting measured soil-respired CO 2 samples for CO 2 contamination in base reagents, for contributions from atmospheric CO 2 , and for isotopic fractionation at the base-solution/air interface.

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