Tuesday, 15 October 2024

Sinks Sunk?

Carbon sinks are the natural mechanisms, removing carbon dioxide from the atmosphere. The most important of these sinks are the oceans, where zooplankton rise each day, to the surface to eat phytoplankton. This process helps take the results of photosynthesis into the depths. Other natural sinks include forests, soils and peat-forming bogs. In general, around 50% of the anthropogenic (human-mediated) carbon dioxide emissions are absorbed by the sinks. Carbon capture and storage is not an effective replacement. Worryingly, a recent study suggests that the land-based sinks have lost their effectiveness. In 2023, forests, plants and soils effectively absorbed none of the excess carbon (https://www.theguardian.com/environment/2024/oct/14/nature-carbon-sink-collapse-global-heating-models-emissions-targets-evidence-aoe). A failure of any of nature's carbon sinks would be really bad news. Obviously, atmospheric carbon dioxide levels would quickly build up. The 'greenhouse gas' effect would be intensified. There would consequently be a rapid acceleration of global heating, with more extreme weather events. All this seems to be occurring, just as countries and fossil-fuel companies are reneging on their 'pledges'!

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