Daily Climate Report (25).

Today is Wednesday 18th October 2023. My last report was on the 11th. Since then, according to the NOAA Global Monitoring Laboratory, the month of September 2023 had an atmospheric CO2 level of 418.51 ppm, compared to 415.91 ppm in September 2022. This is an increase of 2.6 ppm, or 0.625% p.a.

In terms of daily records, the NOAA Global Monitoring Laboratory reports CO2 levels of 418.93 ppm for the 12th, 418.66 ppm for the 13th, 419.81 ppm for the 15th, 419.53 ppm for the 16th, 419.66 ppm for yesterday, the 17th, and 419.29 ppm for today, the 18th.

As usual, CO2 Earth agrees with the NOAA daily reading for the 17th (the reading for the 18th isn't up yet) of 419.66 ppm, and compares it with the reading for the 17th October 2022 of 415.62 ppm. This is an increase of 4.04 ppm = 0.972% p.a.

The Keeling Curve gives an atmospheric CO2 level for the 17th October 2023 of 419.35 ppm = 812.6 mg/m^3 = 3,272.742 GtCO2.

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