Comparisons of OCO-3 XCO2 Measurements with TCCON

Matthäus Kiel,  Jet Propulsion Laboratory/California Institute of Technology,  matthaeus.kiel@jpl.nasa.gov (Presenter)
Annmarie Eldering,  Jet Propulsion Laboratory/California Institute of Technology,  annmarie.eldering@jpl.nasa.gov
Christopher O'Dell,  Colorado State University,  christopher.odell@colostate.edu
Brendan Fisher,  Jet Propulsion Laboratory/California Institute of Technology,  brendan.m.fisher@jpl.nasa.gov

The Orbiting Carbon Observatory-3 (OCO-3) extends NASA’s study of carbon and measures the dry-air mole fraction of column carbon dioxide (XCO2) in the Earth’s atmosphere. The instrument has been collecting routine nadir, glint, target, and SAM data since August 2019. These measurements are compared to ground-based observations from the Total Carbon Column Observing Network (TCCON), providing information about the quality, biases, and errors in the OCO-3 data.

Here, we show comparisons between the latest OCO-3 XCO2 dataset and coincident TCCON measurements. We discuss how these comparisons are utilized to derive quality filter variables and threshold limits in the OCO-3 V10 dataset. Further, we show that applying a post-processing correction mitigates biases in the OCO-3 XCO2 data on continental and local scales. Comparisons to OCO-2 measurements show that the OCO-3 V10 data quality is of comparable quality and ready to be used for carbon cycle science.

Poster: Poster_Kiel__154_25.pdf 

Presentation Type: Poster

Session: 1.5b Results from current missions

Session Date: Monday (6/14) 12:00 PM