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Red line graph time series of monthly carbon dioxide abundance from January 1959 through March 2023. There is a seasonal cycle and long-term increasing trend. Current levels of CO2 are at 421 ppm. This is the Keeling Curve graph. A line for CO2 10 years ago is also annotated.

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Red line graph time series of monthly carbon dioxide abundance from January 1959 through March 2023. There is a seasonal cycle and long-term increasing trend. Current levels of CO2 are at 421 ppm. This is the Keeling Curve graph. A line for CO2 10 years ago is also annotated.
https://fediscience.org/system/media_attachments/files/110/153/025/867/642/017/original/8c9b28133f3b2819.png

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Zack Labe (zlabe@fediscience.org)'s status on Friday, 07-Apr-2023 19:52:01 JST Zack Labe

? I have yet another record to share with you - carbon dioxide (CO₂) averaged a record high of 421 ppm in March 2023
10 years ago March averaged about 398 ppm
+ Preliminary data: https://gml.noaa.gov/ccgg/trends/

In conversation Friday, 07-Apr-2023 19:52:01 JST from fediscience.org permalink