NASA Upgrades Decade of OCO-2 and OCO-3 Carbon Dioxide Data from Space

NASA's Orbiting Carbon Observatory-2 (OCO-2) and OCO-3 (OCO-3) instruments have been collecting over a million daily observations of sunlight reflected from Earth's surface, using physics-based algorithms to convert these raw data into atmospheric carbon dioxide (CO₂) concentrations. Now, after a decade of measurements, NASA has released an upgraded version of this data, improving accuracy and coverage for scientists tracking the greenhouse gas that drives climate change. The new dataset refines how light scattering and surface effects are handled, leading to more reliable CO₂ readings, especially over challenging surfaces like dark oceans and bright deserts. This matters because precise space-based CO₂ monitoring is essential for understanding carbon sources and sinks, verifying national emission inventories, and informing climate policy. With the enhanced data, researchers can better pinpoint regional CO₂ fluxes and trends, from urban plumes to tropical forests. The upgrade ensures that OCO-2 and OCO-3 remain critical tools for global carbon cycle science, supporting efforts to mitigate climate change. As the instruments continue their missions, this improved dataset will enable more accurate predictions of future atmospheric CO₂ levels and their impact on the planet.