Sounds like NASA has found the magic potion. I remember from my time working for a Natural gas trading company. Gas chromatography was used for determining the composition and the gas had to be in direct contact with the chromatograph. We determined percent changes in composition mostly. CO2 is 0,04% of the air around us. This is a very thin soup and the changes are smaller still. And we want to measure it from orbit and with models. Thats like using a hunting binocular to spot changes on Pluto’s surface. Yeah right.
For the first time, researchers have spotted short-term, regional fluctuations in atmospheric carbon dioxide (CO2) across the globe due to emissions from human activities.