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NOAA data  show a carbon dioxide level of 421.13 parts per million (ppm) for the week starting May 8, 2022, a new record high since measurements started at Mauna Loa, Hawaii. As the image below also shows, very high daily levels were reached recently, as high as 422.04 ppm.  Greenhouse gas levels are even higher further north. Very high carbon dioxide levels were recorded recently at Barrow, Alaska, approaching 430 ppm.  Furthermore, very high methane levels were recorded recently at Barrow, Alaska, including many at levels well over 2000 parts per billion (ppb). The trigger: El Niño and sunspots El Niños typically occur every 3 to 5 years, according to  NOAA  and as illustrated by the NOAA image below, so the upcoming El Niño can be expected to occur within the next few years.  As also illustrated by the  NOAA image  on the right, we are currently in the depths of a persistent La Niña and this suppresses current temperatures. A huge tempe...

Carbon dioxide (CO₂) reached an average daily concentration of 422.06 ppm on April 26, 2022, at Mauna Loa, Hawaii. Furthermore, very high methane  (CH₄) concentrations were recorded recently at Mauna Loa, Hawaii, with surface flask readings appearing to be as high as 1955 ppb.   Clouds tipping point A methane concentration of 1955 ppb corresponds, at a  Global Warming Potential (GWP) of 200 , with a carbon dioxide equivalent (CO₂e) of 391 ppm. Together with the above daily average CO₂ concentration of 422.06 ppm this adds up to a joint CO₂e of 813.06 ppm, i.e. less than 387 ppm away from the clouds tipping point  (at 1200 ppm CO₂e) that on its own could raise the global temperature by 8°C. Such a 387 ppm CO₂e could be added almost immediately by a burst of seafloor methane less than the size of the methane that is currently in the atmosphere (about 5 Gt). There is plenty of potential for such an abrupt release, given the rising ocean heat and the vast amounts ...

by Andrew Glikson As terrestrial adversaries keep pushing the Earth and its inhabitants to within seconds of a nuclear catastrophe, looming through heat waves, extreme fires and flood events is the huge calamity of irreversible global warming. [ from earlier post ] Carbon dioxide (CO₂) reached levels well above 420 parts per million (ppm) at Mauna Lao, Hawaii, on February 13 and 14, 2022, as illustrated by the image, from an earlier post . The image below, adapted from  NOAA , shows CO₂ and other greenhouse gases such as methane (CH₄) and nitrous oxide (N₂O) rising from 280 ppm CO₂e in 1700 to 504 ppm CO₂e in 2021. This figure of 504 ppm CO₂e could be much higher when applying a short horizon to calculate methane's Global Warming Potential.  CO₂ levels have been rising from ~315 ppm in 1950 to ~419 ppm in 2022, at an average growth rate of some 1.44 ppm/year accelerating to about 2.5 ppm/year recently.  The rate of this CO₂ rise is unprecedented in the Cenozoic (since 65...

NOAA's globally averaged marine surface monthly mean methane reading for November 2021 of 1909.3 parts per billion (ppb) is 17.6 ppb higher than the reading for November 2020. By comparison, NOAA's  annual global mean methane increase  of 15.57 ppb for 2020 was at the time the highest on record. 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. Carbon dioxide Carbon dioxide levels are currently very high over the Arctic, as illustrated by the image below that shows carbon dioxide levels approaching 430 parts per million (ppm) recently at Barrow, Alaska.  Clouds tipping point [ from earlier post ] The danger is that high greenhouse gas levels could combine to push the carbon dioxide equivalent (CO₂e)...

Carbon dioxide 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. Carbon dioxide levels are even higher at high latitudes north. The image below shows that carbon dioxide levels are approaching 430 ppm at Barrow, Alaska. Methane NOAA's monthly  global mean reading  for October 2021 for methane (CH₄) is 1907.2 parts per billion (ppb), which is 17.1 ppb higher than the reading for October 2020. By comparison, NOAA's annual global mean methane increase of 15.74 ppb for 2020 was the highest on record at the time and the increase for 2021 looks to be even higher. [ from earlier post ] Keep in mind that NOAA's data are for marine surface measurements; more methane tends to accumulate at higher altitudes. Furthermore, keep in mind that the above 1907.2 pp...

NOAA's October 2021 global mean methane reading is 1907.2 parts per billion (ppb), which is 17.1 ppb higher than the reading for October 2020. By comparison, NOAA's annual global mean methane increase of 15.74 ppb for 2020 was at the time the highest on record. Keep in mind that this 1907.2 ppb reading is for October 2021; it now is February 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 peak methane level of 2904 ppb at 469 mb on February 4, 2022 am.  Methane levels are very high over the Arctic. The image below shows high recent monthly average methane levels at Barrow, Alaska.  Carbon dioxide levels over the Arctic are also very high. The image below shows high recent daily average carbon dioxide levels at Barrow, Alaska.  The situation is dire and calls for the most comprehensive and effective action, as described at the Climat...

NOAA's September 2021  global mean methane reading is 1900.5 parts per billion (ppb), which is 15.8 ppb higher than the reading for September 2020. By comparison, NOAA's annual global mean methane increase for 2020 of 15.74 ppb was at the time the highest on record.  Keep in mind that this 1900.5 ppb reading is for September 2021; it now is January 2022. Furthermore, NOAA's data are for marine surface measurements; more methane tends to accumulate at higher altitudes, and especially at higher latitudes North, as also illustrated by the images further below.  Above, a combination image of methane averages between latitudes 60°S and 60°N (top) and annual growth rates for these data (bottom) through to 2021, from a  Copernicus news release . The image on the right shows the Copernicus data for methane growth with an added trend that ominously points at a growth rate for 2022 that could be more than 20%.  Keep in mind that these are data for the latitude range fro...