Global carbon dioxide transport, 2008. Map showing the global variation in atmospheric carbon dioxide levels in July 2008. A scale is at bottom, in parts per million by volume (ppmv), ranging from low (blue and green) to high (orange and red). This map shows how the mid-latitude northern and southern jet streams play a role in moving carbon dioxide around the globe. This global data is from the AIRS (Atmospheric Infrared Sounder) instrument on NASA's Aqua satellite.