Carbon dioxide (CO₂) was 421.59 parts per million (ppm) at Mauna Lao, Hawaii, on February 14, 2022, a level unprecedented in millions of years.
Carbon dioxide levels typically reach their annual maximum in May, so even higher levels can be expected over the next few months.
|[ from earlier post ]|
Furthermore, keep in mind that the above 1907.2 ppb reading is for October 2021; it now is February 2022. The image below shows that recent methane levels are approaching 1940 ppb at Mauna Loa, Hawaii.
Similarly as carbon dioxide, methane levels are even higher at high latitudes north. Furthermore, the rise is accelerating strongly. At Barrow, Alaska, recent methane levels are approaching 2040 ppb.
Again, that could be the result of the climate forcing just of carbon dioxide and methane, without even adding further forcing such as by nitrous oxide. Meanwhile, as discussed, humans will likely go extinct with a 3°C rise, and a 5°C rise will likely end most life on Earth.
The situation is dire and calls for the most comprehensive and effective action, as described at the Climate Plan.
• NOAA - Mauna Loa, Hawaii
• NOAA - Barrow, Alaska
• Terrifying Arctic greenhouse gas levels continue
• NOAA - Nitrous oxide trends
• When Will We Die?