Physics – Geophysics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3516813a&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 16, CiteID L16813
Physics
Geophysics
4
Biogeosciences: Carbon Cycling (4806), Biogeosciences: Remote Sensing, Mathematical Geophysics: Spatial Analysis (0500), Atmospheric Composition And Structure: Troposphere: Constituent Transport And Chemistry
Scientific paper
Satellite measurements of column-averaged CO2 dry-air mole fraction (XCO2) will be used in inversion and data assimilation studies to improve the precision and resolution of current estimates of global fluxes of CO2. Representation errors due to the mismatch in spatial scale between satellite retrievals and atmospheric transport models contribute to the uncertainty associated with flux estimates. This study presents a statistical method for quantifying representation errors as a function of the underlying spatial variability of XCO2 and the spatial distribution of retrieved soundings, without knowledge of the true XCO2 distribution within model gridcells. Representation errors are quantified globally using regional XCO2 spatial variability inferred using the PCTM/GEOS-4 model and a hypothetical atmospheric transport model with 1° × 1° resolution, 3 km2 retrieval footprints, and two different sounding densities.
Alkhaled A. A.
Kawa Randolph S.
Michalak A. M.
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