ScienceDaily: Researchers studying carbon dioxide, a leading greenhouse gas and a key driver of global climate change, now have a new tool at their disposal: daily global measurements of carbon dioxide in a key part of our atmosphere. The data are courtesy of the Atmospheric Infrared Sounder (AIRS) instrument on NASA’s Aqua spacecraft. Moustafa Chahine, the instrument’s science team leader at NASA’s Jet Propulsion Laboratory, Pasadena, Calif., unveiled the new product at a briefing on recent …