The effect of systematic measurement errors on atmospheric CO2 inversions: a quantitative assessment C. Rödenbeck1, T. J. Conway2, and R. L. Langenfelds3 1Max Planck Institute for Biogeochemistry, Jena, Germany 2NOAA Climate Monitoring and Diagnostics Laboratory, Boulder CO, USA 3CSIRO Marine and Atmospheric Research, Australia
Abstract. Surface-atmosphere exchange fluxes of CO2,
estimated by an interannual atmospheric transport inversion
from atmospheric mixing ratio measurements,
are affected by several sources of errors, one of which is
Quantitative information about such measurement errors
can be obtained from regular co-located measurements
done by different laboratories or using different experimental techniques.
The present quantitative assessment is based on intercomparison
information from the CMDL and CSIRO atmospheric measurement programs.
We show that the effects of systematic measurement errors
on inversion results
are very small compared to other errors in the flux estimation
(as well as compared to signal variability).
As a practical consequence, this assessment justifies
the merging of data sets from different laboratories or
different experimental techniques (flask and in-situ),
if systematic differences (and their changes)
are comparable to those considered here.
This work also highlights
the importance of regular intercomparison programs.
Citation: Rödenbeck, C., Conway, T. J., and Langenfelds, R. L.: The effect of systematic measurement errors on atmospheric CO2 inversions: a quantitative assessment, Atmos. Chem. Phys., 6, 149-161, doi:10.5194/acp-6-149-2006, 2006.