Your support helps us to tell the story
From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.
At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.
Your support makes all the difference.Earth’s vegetation could be saturated with carbon by the end of the century and stop acting as a brake on global warming, scientists warn.
A 4C rise in global temperature, predicted by 2100, marks the threshold point after which terrestrial trees and plants will be unable to soak up any more carbon from the atmosphere.
Atmospheric carbon will then start to increase more rapidly, accelerating climate change, the researchers warn.
Vegetation acts as a "carbon sink", a natural system that takes carbon dioxide from the air and traps it. The Amazon rain forest and the vast belt of coniferous Boreal forest that rings the northern hemisphere both act as powerful carbon sinks.
Initially, higher levels of carbon dioxide in the atmosphere will stimulate more plant growth. But the impact of a warmer world will gradually counterbalance this trend until saturation point is reached, say the scientists.
Global warming of 4C will result in the Earth's land vegetation becoming dominated by negative effects, such as "moisture stress", caused by plant cells getting too little water.
At this point, further absorption of atmospheric carbon is likely to flatline, according to the research published in the journal Proceedings of the National Academy of Sciences.
PA
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies
Comments