Daily Climate Report (9).

Today is Wednesday 20th September 2023. The Autumnal Equinox is on the 23rd. The atmospheric CO2 level was 418.86 ppm on the 19th, according to CO2 earth, up from 416.19 ppm on the 19th September 2022, an increase of 2.67 ppm = 0.64% p.a.

The Keeling Curve has a reading of 418.55 ppm for the 19th September 2023. 418.55 ppm = 811.1 mg/m^3 = 3,266.5 GtCO2. 418.86 ppm = 811.7 mg/m^3 = 3,268.9 GtCO2.

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