Annual Greenhouse Gas Index (AGGI) - NOAA Global Monitoring Laboratory The AGGI is a measure of the climate-warming influence of long-lived trace gases in the atmosphere and how that influence has changed since the onset of the industrial revolution The index was designed to enhance the connection between scientists and society by providing a normalized standard that can be easily understood and followed The
Annual Greenhouse Gas Index (AGGI) - NOAA Global Monitoring Laboratory The AGGI in 2023 was 1 51, which means that we’ve turned up the warming influence from greenhouse gases by 51% since 1990 ; It took ~240 years for the AGGI to go from 0 to 1, i e , to reach 100%, and 33 years for it to increase by another 51% In terms of CO 2 equivalents, the atmosphere in 2023 contained 534 ppm, of which 419 is CO 2 alone The rest comes from other gases