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Inversion Products Selection
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Fluxes Description
Mean Flux:
By convention, positive sign for sources of CH4 to the atmosphere and negative sign for sinks
of CH4 from the atmosphere. These fluxes can be directly compared with the results of large-scale independent
bottom-up models, inventories of accounting systems.
Monthly Filtered Fluxes :
Monthly fluxes are deseasonalized and then filtered (in the frequency domain) to remove intra-annual variabilty
over the selected period. 3 months filter to remove only the short term variations (less than 3 months) and 1 year
filter to remove all intra-annual variations
(see details).
Deseasonalized fluxes are especially useful to understand how 'abnormal' was
the CH4 balance of a given region during a specific period as compared to its long-term mean value. For instance,
the big 1997-1998 El Niño and the drought years at northern mid latitudes in 2002, 2003 and 2005 have caused
large anomalies in CH4 fluxes.
Mean Seasonal Cycle flux:
A monthly mean flux averaged over the selected period.
Total flux: total surface emissions of methane with soil uptake deduced.
wetlands flux: methane emissions due to natural and anthropogenic wetlands.
