Satellite
measurements of total column CO2 can be used in inverse models to
help isolate sources and sinks; however, using satellite concentrations in
inversions may introduce spatial, temporal, and clear-sky errors. Using a
coupled ecosystem-atmosphere model, we found that using satellite measurements
to represent temporal averages will introduce large errors into the inversion
and that inverse models must sample the concentrations at the same time as they
are measured. Spatial and local
clear-sky errors are much smaller than the instrumental errors, although they
increase with domain heterogeneity. Inverse models can minimize sampling errors
by using homogenous regions and sampling the CO2 concentrations at
the same time as the satellite.
Author: K.D. Corbin, A.S. Denning, L. Lu, I. Baker, A. Wang (kdcorbin at atmos dot colostate dot edu)
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