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Table 1

Estimated uncertainties for CO2 and CH4. For details see Sect. S1 in the supplement. DOI: https://doi.org/10.1525/elementa.411.t1

Sources of uncertaintyCO2 [ppb]CH4 [ppb]

 
Precision 70 0.64 
Water vapour 35.2 0.16 
Drift with temperature 112.5 0.75 
Drift with time 3.4 0.02 
Reproducibility of primary standard 15.6 0.28 
Reproducibility of secondary standard 44.8 0.33 
Total uncertainty 145.1 1.09 
Sources of uncertaintyCO2 [ppb]CH4 [ppb]

 
Precision 70 0.64 
Water vapour 35.2 0.16 
Drift with temperature 112.5 0.75 
Drift with time 3.4 0.02 
Reproducibility of primary standard 15.6 0.28 
Reproducibility of secondary standard 44.8 0.33 
Total uncertainty 145.1 1.09 
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