More than a quarter of Amazon basin releasing more carbon than it absorbs
More than a quarter of the Amazon basin is now releasing more carbon than it absorbs, according to a comprehensive study.
Brazilian researchers flew an aircraft over the rainforest every two weeks for nine years, taking air samples from just above the canopy all the way up to 4.5km.
They found that the eastern side of the Amazon, which accounts for around 28% of the total area, is losing more carbon as a result of deforestation than is being removed from the atmosphere by the growth of trees.
Some of the carbon is lost through fires, deliberately started to clear the forest for agriculture.
An area that covers 28% of the Amazon is losing more carbon as a result of deforestation than it is removing from the atmosphere by the growth of trees
But the knock-on effect of an absence of trees is local climate change, with rising temperatures and reduced rainfall accelerating the decline of surrounding areas of forest. Parts of the Amazon have flipped from being a carbon sink to a carbon source.
Mark Wright, director of science for conservation charity WWF, told Sky News that the research showed the Amazon is at a tipping point, where great swathes of forest could be destroyed by self-perpetuating dieback.
“We’re no longer talking about some dystopian future, this is stuff we can see on the ground, these changes are happening here and now,” he said.
“It’s a warning of what is still come to come.
“We know we are moving towards that inextricable situation where the forest will slowly transform into a more grass-like savannah ecosystem and as a result will push more carbon into the atmosphere.”
The world’s plants have absorbed 25% of fossil fuel emissions since 1960, helping to reduce global warming.
The Amazon rainforest has taken up a significant proportion, storing an estimated 123 billion tonnes in the trees and other vegetation.
But the new research suggests it can’t be relied on in future to mop up carbon dioxide from the atmosphere because human activity is disrupting the delicate ecosystem.
The researchers, led by National Institute for Space Research in Brazil, found that on the lush western side of the Amazon basin slightly more carbon is being absorbed through photosynthesis than is being released by dead trees and human impact on the forest.
But it was a significantly different story on the eastern side, where 27% of the forest has been lost, more than twice the rate in the west.
Results published in the journal Nature show that the area has switched from being a carbon sink to a net source during the nine years of the study, with local climate change destabilising the delicate ecosystem.
The researchers say that in the drier months of August to October the temperature in the eastern Amazon has increased by between 1.9C and 2.5C over 40 years. Rainfall has decreased by between 24% and 34%.
The researchers say there is a direct link between the changing climate and tree loss.
Human activity is disrupting the Amazon’s delicate ecosystem
The Amazon receives an average of more than 2m of rain a year, with between a quarter and a third of it resulting from moisture released by trees.
With a shrinking forest in the east the atmosphere is drier, stunting the growth of remaining trees and reducing the amount of carbon they absorb.
Some scientists have predicted that if the Amazon reaches a tipping point it will retreat to cover only a relatively small area in the west, with a devastating impact on biodiversity and atmospheric carbon.
But Mark Wright said: “The future is potentially very, very bleak, but it’s not too late.
“If we follow the science, we can clearly see there is scope to do really good agricultural development in Brazil, in a way that will boost their economy, in a way that does not require further degradation.
“If we can concentrate on restoring those lands there is still hope for preventing that kind of runaway process.
“But we have to act now, we can’t keep pushing this off.”
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Sky News has launched the first daily prime time news show dedicated to climate change.
The Daily Climate Show is broadcast at 6.30pm and 9.30pm Monday to Friday on Sky News, the Sky News website and app, on YouTube and Twitter.
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The show also highlights solutions to the crisis and how small changes can make a big difference.
The fast-moving developments on Trump’s Ukraine peace deal are dominating the G20 summit in South Africa, as European leaders scramble to put together a counter-proposal to the US-Russia 28-point plan and reinsert Ukraine into these discussions.
European countries are now working up proposals to put to President Trump ahead of his deadline of Thursday to agree a deal.
Ukraine is in a tight spot. It cannot reject Washington outright – it relies on US military support to continue this war – but neither can it accept the terms of a deal that is acutely favourable to Russia, requiring Ukraine to give up territory not even occupied by Moscow and reducing its army.
Overnight, the UK government has reiterated its position that any deal must deliver a “just and lasting peace”.
Ukraine war latest: Kyiv to discuss ending war in talks in Switzerland
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Keir Starmer calls for growth plan at G20
The prime minister, who spoke with E3 allies President Macron of France, Chancellor Merz of Germany and President Zelenskyy of Ukraine on the phone on Friday, is having more conversations today with key partners as they work out how to handle Trump and improve this deal for Ukraine.
One diplomatic source told me allies are being very careful not to criticise Trump or his approach for fear of exacerbating an already delicate situation.
Instead, the prime minister is directing his attacks at Russia.
Read more:
Trump’s 28-point Ukraine peace plan in full
Analysis: We could all pay if Europe doesn’t guarantee Ukraine’s security
Prime Minister Keir Starmer attends a plenary session on the first day of the G20 Leaders’ Summit. Pic: Reuters
“There is only one country around the G20 table that is not calling for a ceasefire in Ukraine and one country that is deploying a barrage of drones and missiles to destroy livelihoods and murder innocent civilians,” he said on Friday evening.
“Time and again, Russia pretends to be serious about peace, but its actions never live up to its words.”
Pic: AP
On the Trump plan, the prime minister said allies are meetin on Saturday “to discuss the current proposal on the table, and in support of Trump’s push for peace, look at how we can strengthen this plan for the next phase of negotiations”.
Strengthening the plan really means that they want to rebalance it towards Ukraine’s position and make it tougher on Russia.
“Ukraine has been ready to negotiate for months, while Russia has stalled and continued its murderous rampage. That is why we must all work together with both the US and Ukraine, to secure a just and lasting peace once and for all,” said the prime minister.
“We will continue to coordinate closely with Washington and Kyiv to achieve that. However, we cannot simply wait for peace.
“We must strain every sinew to secure it. We must cut off Putin’s finance flows by ending our reliance on Russian gas. It won’t be easy, but it’s the right thing to do.”
Pic: AP
Europeans hadn’t even seen this deal earlier in the week, in a sign that the US is cutting other allies out of negotiations – for now at least.
Starmer and other European leaders want to get to a position where Ukraine and Europe are at least at the table.
There is some discussion about whether European leaders such as Macron and Meloni might travel to Washington to speak to Trump early next week in order to persuade him of the European and Ukrainian perspective, as leaders did last August following the US-Russian summit in Alaska.
But Sky News understands there are no discussions about the PM travelling to Washington next week ahead of the budget.
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