Originally published on
by at Arctic News
Keep in mind that this 1909.3 ppb reading is for November 2021; it now is March 2022. Furthermore, NOAA’s data are for marine surface measurements; more methane tends to accumulate at higher altitudes.
The image below shows that the MetOp-B satellite recorded a mean methane level of 1936 ppb at 321 mb on March 7, 2022 pm.
The danger is that high greenhouse gas levels could combine to push the carbon dioxide equivalent (CO₂e) level over the 1200 ppm clouds tipping point in one spot, causing low-altitude clouds in various neighboring areas to break up, propagating break-up of clouds in further areas, as discussed at the clouds feedback page.
The MetOp-B satellite recorded a mean methane level of 1958 ppb on October 25, 2021 am at 295 mb. When using a 1-year GWP of 200, this translates into 391.6 ppm CO₂e. Together with a global mean CO₂ level of 420 ppm, that’s 811.6 ppm CO₂e, i.e. only 388.4 ppm CO₂e away from the 1200 ppm CO₂e clouds tipping point.
• NOAA – globally averaged marine surface monthly mean methane data
• NOAA – globally averaged marine surface annual mean methane growth rates
• NOAA – Infrared Atmospheric Sounding Interferometer (IASI) Sounding Products (MetOp-B)
• NOAA – Trends in Atmospheric Carbon Dioxide
• NOAA – Carbon Cycle Gases, Barrow Atmospheric Baseline Observatory, United States
• NOAA – Trends in Atmospheric Carbon Dioxide, Mauna Loa, Hawaii
• Clouds feedback page
• Human Extinction by 2022?
• Terrifying Arctic methane levels
• Terrifying Arctic methane levels continue
• Climate Plan