Amazon tipping – A new Misryoum report warns severe Amazon dieback could follow combined warming and deforestation, potentially as soon as the 2030s.
The Amazon’s fate may hinge not only on rising temperatures, but on how quickly forests are cleared: new Misryoum modeling suggests that renewed, large-scale deforestation could push the rainforest toward irreversible dieback within decades.
In earlier tipping point work. the Amazon was found to be vulnerable if global warming reaches around a few degrees above pre-industrial levels. with widespread dieback possible under worst-case conditions.. What Misryoum highlights now is that those risk thresholds look different when deforestation is added.. Misryoum reports researchers used scenarios combining continued warming with severe forest loss through mid-century. finding that the “critical” level of warming associated with major dieback could be reduced when large areas are removed.
This matters because forests in the Amazon are not just carbon storage. They also help power local rainfall patterns through moisture recycled by trees. When deforestation breaks that system, the landscape can shift more easily into states that reinforce further drying.
Misryoum describes how atmospheric rivers carry moisture from the Atlantic across the basin. and how transpiration from the rainforest helps sustain rainfall across regions.. But as forests are cleared, less moisture returns to the air, and drying can extend into areas downwind.. In this kind of feedback loop. losses in one part of the forest can make other areas more vulnerable. setting up a domino effect where warming and land clearing work together.
The timing and scale of predicted dieback varied across modeling runs. depending on how much carbon the world emits and how much forest is lost.. Misryoum reports that if overall forest loss reaches levels comparable to the modeled severe scenarios. large portions of the Amazon biome could shift toward grassland. savanna. or scrubby forest even at relatively lower warming levels than earlier studies suggested.. In the most concerning pathway described. renewed high deforestation could raise the odds of crossing a tipping point as soon as the early 2030s.
At the same time, the outlook is not purely deterministic.. Misryoum notes that deforestation rates have recently slowed, and Brazil has made commitments to halt Amazon deforestation by 2030.. While the modeling focuses on aggressive forest loss. the researchers argue that avoiding the worst-case assumptions would meaningfully reduce the chance of triggering the most abrupt transitions.
But Misryoum also points to ongoing pressure from fire.. Wildfires accounted for a large share of forest destruction in recent years. and these fires can spread into neighboring forest once burning escapes from cleared areas.. With the Amazon already experiencing hotter and drier conditions. fire behavior may shift into a more frequent. damaging regime. especially during climate phases that increase drought risk.
For Misryoum, the broader implication is clear: the Amazon tipping risk is shaped by a two-part equation.. Limiting warming helps. but reducing deforestation helps even more. because it protects the rainforest’s ability to regulate rainfall and resist cascading changes.. The goal, the reporting underscores, is to step away from dangerous thresholds rather than drift toward them.