Column Averaged CO2, CH4, and CO Mixing Ratios at ARM-SGP

We report column-averaged measurements of CO2, CH4, and CO made at the ARM Climate Research Facility in the Southern Great Plains (36.6053 N, 97.4891 W), near Lamont, Oklahoma, USA. Data include multi-year records of midday near-surface (60 m) CO2 and CO mixing ratios, periodic continuous CO2, and flask CO2, CH4, and CO profiles (to ~ 5 km) from a small aircraft, a limited number of flask profiles (to ~ 12 km) from a NASA Lear 25, column CO2, CH4, and CO retrievals made with a sun-tracking Fourier transform spectrometer (FTS) deployed at the SGP site, and estimates of CO2, CH4, and CO from the Tropospheric Emission Spectrometer (TES) on the NASA Aura spacecraft. We compare aircraft measurements with prototype TES retrievals of CO2, TES representative tropospheric values of CH4, and TES CO profile values. We then compare the column-average mixing ratios with the FTS retrievals, and examine the differences in each comparison for seasonality. These results provide an initial evaluation of the TES and FTS retrievals at the ARM-SGP and prepare for future evaluation of CO2 and CH4 retrievals from future satellite missions including GOSAT.