Just in: NOAA index tracks how greenhouse gas pollution amplified global warming in 2022. Greenhouse gas pollution from human activity trapped 49% more heat in atmosphere during 2022 than same gases did in 1990. NOAAResearch AGGI ClimateChange
Greenhouse gas pollution from human activity trapped 49 percent more heat in the atmosphere during 2022 than those same gases did in 1990, according to an annual NOAA report.
The global average abundances of the major, well-mixed, long-lived greenhouse gases - carbon dioxide, methane, nitrous oxide, CFC-12 and CFC-11 - from the NOAA global air sampling network since the beginning of 1979 are depicted here. These five gases account for about 96% of the direct radiative forcing by long-lived greenhouse gases since 1750. The remaining 4% is contributed by 15 other halogenated gases including HCFC-22 and HFC-134a, for which NOAA observations are also shown here.
The 2021 revisions from IPCC primarily address improvements in radiative forcing calculations due to updated spectroscopic measurements. As a result, GML recalculated AGGI values for all preceding years so there are no artificial step changes in the long-term record. The recalculated 2021 AGGI value is 1.47 instead of the 1.49 calculated with the previous method. The revised 2020 AGGI value is 1.45 instead of 1.47.
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