A222-0008
Update on Validation of OCO-2 Version 10, OCO-3 vEarly and ACOS Version 9 Data Products
Wednesday, 16 December 2020
Poster
Gregory B Osterman1, Matthäus Kiel1, Brenden Fisher1, Chris O'Dell2, Robert R Nelson1, Coleen Marie Roehl3, Joshua Laughner3, Paul Wennberg3, Michael R Gunson1, Annmarie Eldering1, David Crisp1 and Debra Wunch4, (1)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (2)Cooperative Institute for Research in the Atmosphere, Fort Collins, CO, United States, (3)California Institute of Technology, Pasadena, CA, United States, (4)University of Toronto, Department of Physics, Toronto, ON, Canada
Abstract:
Recently the Orbiting Carbon Observatory-2 (OCO-2) project released a new version (V10) of its Level 2 data products. Also, in 2020, the OCO-2 team released version 9 (V9) of the Level 2 (L2) Atmospheric CO2 Observations from Space (ACOS) data product. The ACOS data product uses the OCO-2 retrieval algorithm to generate column averaged dry air mole fraction (X
CO2) and other geophysical quantities retrieved from the Greenhouse Gases Observing Satellite (GOSAT) mission observations. This year also brought the first release of data from the Orbiting Carbon Observatory-3 (OCO-3), which launched and was installed on the International Space Station in May 2019. With these new data releases, there is now over 10 years of X
CO2 data from the ACOS/GOSAT collaboration and over six years of data from OCO-2. The addition of OCO-3 provides an additional record of X
CO2 observations from space.
One of the primary methods for validation of the ACOS and OCO-2 XCO2 data products has been comparisons to observations from the Total Carbon Column Observation Network (TCCON), (Wunch et al., 2017, 2011). Other methods of validation such as comparison to multi-model means, data from aircraft, balloon-borne instruments have also been utilized. Similarly, OCO-3 also utilizes this validation framework, the direct comparisons of the satellite data to TCCON observations, first developed for the original OCO mission and then used by ACOS and OCO-2.
In this work we will present the latest information on validation of the new OCO-2 and ACOS XCO2 data. We will also show preliminary validation results for the early OCO-3 XCO2 observations. We will focus mainly on comparisons to TCCON, but also use other sources of validation data to provide an overview of the evaluation of observations from all three instruments. The multi-year record of the satellite data product provides an opportunity to examine how the satellite bias and errors have evolved over the instrument lifetimes.
