Continued Evaluation of OCO-2 Small-Scale Variability Using Lidar and In Situ CO2 Observations from the ACT-America Campaign

Emilly Bell, Sandip Pal

Research output: Contribution to conferencePaper

Abstract

NASA’s Atmospheric Carbon and Transport – America (ACT-America) field campaign provides the unique opportunity to validate small-scale satellite column CO2 measurements. The Orbiting Carbon Observatory 2 (OCO-2) satellite provides a robust XCO2 dataset on a global scale, but the sparseness of ground-based networks makes validation on the finest OCO-2 resolutions, 1-10km, a challenge. After four complete ACT-America field campaigns, the Multi-functional Fiber Laser LIDAR (MFLL) instrument has completed nine underflights of OCO-2, allowing for direct spatial comparison of the two datasets over several North American regions. Comparisons show a respectable level of agreement between satellite- and LIDAR-observed XCO2 gradients over the course of several hundred kilometers, but little agreement on smaller scales. Further comparisons to models and in situ column data, including two-dimensional CO2 “curtains” constructed from in situ data along the flight track, show varying levels of spati
Original languageEnglish
StatePublished - Dec 10 2018

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