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. 2014 Jun 23;4:5402. doi: 10.1038/srep05402

Figure 9. Boxplots of data on pCO2, CH4, and N2O concentrations for the mainstem Oubangui River (data from 2 years of monitoring), and tributaries of the Oubangui (all sites and sampling seasons combined).

Figure 9

pCO2 data for the lower Congo River are from Wang et al. (2013). n indicates the number of data points.