For Version 4 (data through 2022)

• Data source: Table 2. Global Radiative Forcing, CO2-equivalent mixing ratio, and the AGGI 1979-2022

— Link: https://gml.noaa.gov/aggi/aggi.html

— Archive thereof: https://web.archive.org/web/20230524133553/https://gml.noaa.gov/aggi/aggi.html

— Reference wikicode:
<ref name=NOAA_AGGI_2022>{{cite web |title=The NOAA Annual Greenhouse Gas Index (AGGI) |url=https://gml.noaa.gov/aggi/aggi.html |website=NOAA.gov |publisher=National Oceanic and Atmospheric Administration (NOAA) |archive-url=https://web.archive.org/web/20230524133553/https://gml.noaa.gov/aggi/aggi.html |archive-date=24 May 2023 |date=Spring 2023 |url-status=live }}</ref>

For Versions 2–3 (data through 2021)

• Data source: Table 2 of "THE NOAA ANNUAL GREENHOUSE GAS INDEX (AGGI)"

— Link: https://gml.noaa.gov/aggi/aggi.html

— Archive thereof: https://web.archive.org/web/20230416202714/https://gml.noaa.gov/aggi/aggi.html

— Reference wikicode:
<ref name=NOAA_AGGI_2021>{{cite web |title=The NOAA Annual Greenhouse Gas Index (AGGI) |url=https://gml.noaa.gov/aggi/aggi.html |website=NOAA.gov |publisher=National Oceanic and Atmospheric Administration (NOAA) |archive-url=https://web.archive.org/web/20230416202714/https://gml.noaa.gov/aggi/aggi.html |archive-date=16 April 2023 |date=Spring 2022 |url-status=live }}</ref>

For Version 1 (data through 2019 only)

• Data source: ● Climate Change Indicators: Climate Forcing . EPA.gov . United States Environmental Protection Agency (2021). Archived from the original on May 9, 2021 . ● EPA credits data from NOAA's Annual Greenhouse Gas Index (An Introduction) . NOAA.gov . National Oceanic and Atmospheric Administration (Global Monitoring Laboratory, Earth System Research Laboratories) (December 2020). Archived from the original on May 13, 2021 .
• Archives thereof:

https://web.archive.org/web/20210509084918/https://www.epa.gov/climate-indicators/climate-change-indicators-climate-forcing

https://web.archive.org/web/20210513163545/https://gml.noaa.gov/aggi/

• Sourced content is believed to be originated by employees of the U.S. government in the ordinary course of their employment.

Technical notes

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