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. 2015 Mar 23;112(14):4465–4470. doi: 10.1073/pnas.1424989112

Fig. 1.

Fig. 1.

Headspace CO concentrations (ppb; means ± 1 SE, n = 3) as a function of time for intact cores from Wendover, Utah, saline soil (July 2014); soil surface water potentials were approximately −41 MPa. Initial CO concentrations represented ambient atmospheric CO; the dashed line indicates the apparent CO uptake threshold.