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Showing posts with the label seafloor

Carbon dioxide crosses 422 ppm

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 ...

Terrifying Arctic methane levels

A peak methane level of 3026 ppb was recorded by the MetOp-B satellite at 469 mb on December 11, 2021 am. This follows a peak methane level of  3644 ppb  recorded by the MetOp-B satellite at 367 mb on November 21, 2021, pm. A peak methane level of 2716 ppb was recorded by the MetOp-B satellite at 586 mb on December 11, 2021, pm, as above image shows. This image is possibly even more terrifying than the image at the top, as above image shows that at 586 mb, i.e. much closer to sea level, almost all methane shows up over sea, rather than over land, supporting the possibility of large methane eruptions from the seafloor, especially in the Arctic.  Also, the image was recorded later than the image at the top with the 3026 ppb peak, indicating that even more methane may be on the way. This appears to be confirmed by the Copernicus forecast for December 12, 2021, 03 UTC, as illustrated by the image below, which shows methane at 500 hPa (equivalent to 500 mb). Furthermore, ...

Arctic Ocean overheating

The Arctic Ocean is overheating, as illustrated by above image. [ from  earlier post  ] Heating of the water in the Arctic Ocean is accelerating, as illustrated by above map that uses 4-year smoothing and that shows temperatures in the Arctic that are up to 4.41°C hotter than the average global temperature during 1880-1920. The NOAA image on the right shows the sea surface temperature difference from 1961-1990 in the Arctic at latitudes 60°N - 90°N on September 7, 2019. Where Arctic sea ice disappears, hot water emerges on the image, indicating that the temperature of the ocean underneath the sea ice is several degrees above freezing point. The nullschool.net image on the right shows sea surface temperature differences from 1981-2011 on the Northern Hemisphere on September 8, 2019, with anomalies reaching as high as 15.2°C or 27.4°F (near Svalbard, at the green circle). Accelerating heating of the Arctic Ocean could make global temperatures skyrocket in a matter of years. Decl...