Without strong climate action, forests on every continent will be highly flammable for at least 30 extra days per year by the end of the century – and this fire threat is far greater for some forests including the Amazon, according to our new study.
Our research in Nature Communications looked at 20 years of global satellite data to test the link between wildfires and “vapour pressure deficit” – a measure of the atmosphere’s power to suck moisture out of living and dead plants. It can also be thought of as how “thirsty” the air is.
Our results show that forest fire becomes much more likely above a certain threshold of vapour pressure deficit in many regions. This threshold depends on the type of forest.
