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Carbon storage function fails; 20% of the Amazon rainforest becomes a major carbon emitter.

2020-05-15

The Brazilian Amazon rainforest, once known as the "lungs of the Earth," has been found by the Brazilian Space Research Institute to have lost the ability to absorb carbon dioxide in 20% of its area. Furthermore, within 30 years, nearly half of the rainforest could become a carbon emitter. How to address this is a question that deserves our serious consideration. https://s3.csrone.com/upload/articles/4pTeLnatQqVfMmiUHsw0gdcYgZkX1xWKrOBIeqFQ.jpeg The Brazilian Amazon rainforest absorbs a large amount of carbon emissions from humans, hence its nickname "lungs of the Earth." However, current research has found that approximately 20% of the Amazon rainforest actually produces more carbon dioxide than it absorbs. How is this possible? In fact, trees absorb carbon dioxide from the atmosphere during their growth process, and when the trees die, this absorbed carbon dioxide is "returned." Due to extensive deforestation and forest fires, up to 20% of the Amazon rainforest has begun to return the carbon absorbed during its growth, causing the rainforest to become a major carbon emitter. Over the past decade, a team led by Professor Luciana Gatti from the Brazilian Space Research Agency (INPE) has been measuring greenhouse gas emissions in different sections of the Amazon rainforest every two weeks using spacecraft equipped with sensors. They discovered that while the rainforest still possesses the capacity to absorb significant amounts of carbon dioxide, one area, drastically reduced by deforestation, has lost this crucial ability. This yet-to-be-released report reveals that the southeastern section of the Amazon rainforest is not only unable to absorb carbon but has become a source of carbon emissions. Generally, rainforests absorb carbon dioxide more effectively in wetter years, but this area emits carbon regardless of whether it's wet or dry. Analysis indicates this result is worrying, suggesting that the rainforest, originally a key player in carbon storage, may be gradually transforming into a carbon emitter. Carlos Nobre, from the same team, says that within the next 30 years, perhaps half the rainforest may have transitioned to this role, not including the carbon dioxide produced by deforestation and forest fires themselves; therefore, the true carbon emissions figure would be even more substantial. With Brazilian President Jair Bolsonaro declaring that economic development is more important than rainforest protection, the future of a changing role for the Amazon rainforest may not be so far off. Source: Taiwan English News; Image source: Dhruva Reddy

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