---
- attributes: ~
  caption: "Radiative forcing (shown on the left vertical axis) is the change in the amount of solar radiation, or energy from the sun, that is trapped by the atmosphere and remains near Earth. When radiative forcing is greater than zero, it has a warming effect; when it is less than zero, it has a cooling effect. In this indicator, radiative forcing from long-lived greenhouse gases is shown relative to the year 1750.\r\n\r\nThe AGGI (shown on the right vertical axis) is an index of radiative forcing normalized to the year 1990 (represented by a red dot); it shows that the warming influence of long-lived greenhouse gases in the atmosphere increased by 45% between 1990 and 2020."
  chapter_identifier: ~
  create_dt: 2017-11-13T19:39:43
  href: https://data.globalchange.gov/report/indicator-annual-greenhouse-gas-index-2021/figure/indicator-annual-greenhouse-gas-index-2021.yaml
  identifier: indicator-annual-greenhouse-gas-index-2021
  lat_max: 90
  lat_min: -90
  lon_max: 180
  lon_min: -180
  ordinal: 1
  report_identifier: indicator-annual-greenhouse-gas-index-2021
  source_citation: ~
  submission_dt: 2021-08-13T19:22:14
  time_end: 2020-12-31T00:00:00
  time_start: 1979-01-01T00:00:00
  title: Annual Greenhouse Gas Index
  uri: /report/indicator-annual-greenhouse-gas-index-2021/figure/indicator-annual-greenhouse-gas-index-2021
  url: ~
  usage_limits: Figure may be copyright protected and permission may be required. Contact original figure source for information