The C-13/C-12 kinetic isotope effect for soil oxidation of methane at ambient atmospheric concentrations
During a survey of the Alaskan North Slope to estimate the isotopic composition and fluxes of methane (CH4) from the tundra, two sites were encountered that showed net methane consumption within flux chambers. Methane concentrations decreased from ambient (1.78 ppmv) by up to 50 percent, and the del...
| Main Authors: | , , |
|---|---|
| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
1989
|
| Subjects: | |
| Online Access: | http://ntrs.nasa.gov/search.jsp?R=19900034972 |
| Summary: | During a survey of the Alaskan North Slope to estimate the isotopic composition and fluxes of methane (CH4) from the tundra, two sites were encountered that showed net methane consumption within flux chambers. Methane concentrations decreased from ambient (1.78 ppmv) by up to 50 percent, and the delta C-13 increased by up to 10 percent in the two chamber deployments showing CH4 consumption. CH4 consumption rates were measured to be 1.2 and 0.6 mg CH4/sq m per day; the corresponding carbon kinetic isotope effects (k13/k12) were 0.974 and 0.984, respectively. |
|---|