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Environment & Energy

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Tonk

(74 posts)
Tue Apr 22, 2025, 07:38 AM Apr 2025

'The Mauno Loa observatory showed the first weekly average CO₂ concentration of 430 ppm in at least 3 million years!' [View all]

Atmospheric CO2 has passed 430 parts per million.

The last time CO2 was 430 ppm occurred during the Pliocene Epoch, three to five million years ago. Humans did not exist during this period. The climate news is worse than what we are being told. Trump is doing all he can to usher in the end times.

The Mauno Loa observatory showed the first weekly average COâ‚‚ concentration of >430 ppm in at least 3 million years!

Including other greenhouse gases, the COâ‚‚-equivalent is at >560 ppm.

Which represents more than a doubling of preindustrial COâ‚‚.

Without aerosols, this would cause ~5°C of warming

Leon Simons (@leonsimons.bsky.social) 2025-04-21T20:59:57.845Z


🚨Very bad news!

Annual global COâ‚‚ increase of 3.75 ppm! @climate.noaa.gov had to extend its y-axis by 1 ppm for the first time.

More and more of the COâ‚‚ we emit stays in the atmosphere (Airborne fraction).

Likely because the Land Sink (biosphere) is decreasing, increasing the Atmospheric Sink

Leon Simons (@leonsimons.bsky.social) 2025-04-15T07:59:29.631Z


Preparing for the European Geosciences Union, we take a look at the total greenhouse gas forcing.

Using COâ‚‚-equivalents to present the total GHG forcing changes from 130,000 years ago to 2024.

We are now at about 567 ppm.
More than a doubling!

This is in line with IPCC methods based estimates:

Leon Simons (@leonsimons.bsky.social) 2025-04-13T15:18:00.533Z


From RTL, translated from Dutch to English.

https://www.rtl.nl/nieuws/binnenland/artikel/5500259/stijging-co2-gaat-sneller-en-sneller-gaat-compleet-de-verkeerde

Land absorbs less

Simons is referring to nature that absorbs the greenhouse gas. Overall, oceans absorb 25 percent of CO2 emissions, land (e.g. forests and grasslands) 25 percent, and 50 percent remains in the atmosphere. But that seems to be changing.

If nature no longer helps us, we have to do it ourselves. More is being done to green energy and to reduce emissions. So why are total emissions not falling? You can see it in this video:

The uptake of trees and plants in particular is lagging behind in the new figures, and emissions are actually increasing. "So that's going completely in the wrong direction," says climate scientist Bart Verheggen of the KNMI. "You hope that emissions will go down, and the uptake by oceans and biosphere will increase along with the concentration. That is not the case."
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