Key Takeaways
- Tropical forests are vital for absorbing carbon dioxide, helping to regulate global temperatures and climate balance.
- Deforestation poses a serious threat to carbon balance by releasing stored carbon back into the atmosphere.
- From 1990 to 2020, disturbances in tropical humid forests resulted in a loss of nearly 16 billion tonnes of carbon.
- Small clearings, making up only 5% of disturbed areas, account for 56% of net carbon losses in tropical humid forests.
- The study's findings can inform climate policies by identifying areas of significant carbon loss and the impact of small-scale disturbances.
Tropical forests play a crucial role in absorbing atmospheric carbon dioxide. Since carbon dioxide holds heat, having less of it in the air leads to lower temperatures. Therefore, tropical forests are key players in maintaining the global climate balance.
The Threat of Deforestation
Deforestation stands as a significant threat to the equilibrium that tropical forests help create. When trees are removed or set ablaze, the carbon that was stored gets released back into the atmosphere. This phenomenon is known as carbon loss.
New Findings on Carbon Loss
A recent study has shed light on the serious threat that deforestation poses to carbon balance. It revealed that between 1990 and 2020, disturbances in tropical humid forests led to a staggering loss of nearly 16 billion tonnes of carbon.
In contrast, tropical dry forests showed a more balanced situation regarding carbon gains and losses. The main disturbances in these areas generally come from wildfires, which allow the forests to regenerate. On the other hand, human activities mainly cause disturbances in tropical humid forests, hindering any chance of recovery.
Surprising Impact of Small Clearings
One of the most surprising findings from the research was that small-scale clearings are responsible for significant carbon losses. Although they make up only about 5% of the total disturbed areas, these clearings contribute to 56% of the net carbon losses. The research team utilized satellite observations and new biomass recovery curves to monitor carbon changes at a 30-meter scale.
This study has the potential to guide climate policies and intervention efforts. Organizations can now pinpoint where carbon losses are occurring and grasp the magnitude of damage caused by small-scale disturbances to our ecosystem. The findings were published in the journal Nature.
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