Global CO2 fluxes inferred from surface air-sample measurements and from TCCON retrievals of the CO2 total column

摘要: We present the first estimate of global distribution CO_2 surface fluxes from 14 stations Total Carbon Column Observing Network (TCCON). The evaluation this inversion is based on 1) comparison with a classical air-sample-measurements, and 2) mixing ratios calculated inverted independent aircraft measurements made during two years analyzed here, 2009 2010. former test shows similar seasonal cycles in northern hemisphere consistent regional carbon budgets between inversions datasets, even though TCCON appears to be less precise than inversion. latter confirms that has improved quality (i.e., reduced uncertainty) compared assumed or prior fluxes. consistency surface-air-sample-based TCCON-based despite remaining flaws transport models opens possibility increased accuracy robustness flux combination both data sources usefulness space-borne monitoring column.