Plots of time series of prior, posterior-assimilation and observed of CH₄ and its stable isotopic ratios (δ¹³C-CH₄), at the CarbonTracker observation sites, and statistics of residuals at the sites for selected periods (residuals are the difference between the prior- and posterior-assimilation and measured mole fractions).

Plots include residuals (simulated - observed) for aircraft profiles at the observation sites, shown as a function of date and sample elevation. and statistical summaries of residuals for aircraft profiles at the observation sites, shown as a function of elevation.