Daily Climate Report (27).

Today is Monday 6th November 2023. The NOAA Global Monitoring Laboratory reports that the monthly average atmospheric CO2 reading at the Mauna Loa Observatory in Hawaii during the month of September was 418.51 ppm, up from 415.91 ppm a year earlier - an increase of 2.6 ppm (0.625% p.a.).

Taking the daily means of the last month, since the 6th October, reported by the NOAA, the atmospheric CO2 level has averaged 419.05 ppm.

The Keeling Curve reports a CO2 reading of 419.41 ppm for the 3rd November 2023. CO2 Earth reports one of 419.89 ppm for the 4th November, up from 416.55 ppm a year earlier. This is an increase of 3.34 ppm (0.802% p.a.).

The NOAA reports CO2 levels of 418.84 ppm for the 1st (my 67th birthday, incidentally), 418.98 ppm for the 2nd, 419.28 ppm for the 3rd, 419.89 ppm for the 4th and 419.35 ppm for the 5th.

It is safe to predict that we will soon be back above 420 ppm of CO2 = 814 mg/m^3 = 3,277.8144 GtCO2, i.e., perilously close to the Mid-Piacenzian Warm Period maximum (de la Vega et al, 2020; Blaber, 2023). The only things preventing the level of global warming seen 3.205 Mya (million years ago), i.e., 3°C, are the aerosols (e.g., PM10s and PM2.5s) currently in our atmosphere, due to be removed by clean-air legislation on health grounds (Hansen, Kharecha and Sato, 2013).

We need to remove both the aerosols and the greenhouse gases from Earth's atmosphere - and in order to do this, we have to stop burning fossil fuels!

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