• Sun. Dec 3rd, 2023

Plants absorb more CO2 than previously believed, study shows


Nov 21, 2023

A recent study published in the journal “Science Advances” has presented a surprising optimistic outlook for the planet. According to the research, plants may be able to absorb more atmospheric CO2 from human activities than previously expected. However, while this is good news, it should not be seen as a reason for governments to slow down on their obligations to reduce carbon emissions as quickly as possible.

Dr. Jurgen Knauer, who led the research team at the Hawkesbury Institute for the Environment at Western Sydney University, explained that the study found that a well-established climate model predicts a stronger and more sustained carbon absorption by plants until the end of the 21st century when accounting for critical physiological processes that govern photosynthesis. These processes include how efficiently carbon dioxide moves through leaves, how plants adapt to temperature changes, and how they distribute nutrients in their canopy. These mechanisms are often ignored in global models but have a significant impact on a plant’s ability to fix carbon.

The study focused on photosynthesis, which is where plants convert CO2 into sugars and serve as a natural climate change mitigator. However, while there may be some positive effects of climate change on carbon uptake by vegetation, it is still unclear how vegetation will respond to changes in CO2, temperature and precipitation in the future.

In their scientific modeling study, Knauer’s team evaluated how carbon uptake by vegetation would respond to global climate change through the end of the 21st century under a high-emissions scenario. They found that more complex models incorporating plant physiological processes consistently projected stronger increases in carbon uptake by vegetation globally. The effects of these processes reinforced each other resulting in even stronger effects when taken into account together as would happen in real-world conditions.

Overall, while this new research provides some hope for combating climate change, it is crucial that governments continue to take immediate action to reduce carbon emissions and promote sustainable practices across all sectors of society.

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