Up to 30 per cent of the planet’s land surface would become arid if global temperatures rise 2C above pre-industrial levels, according to a new study.
Widespread drying out of planet's surface will impact agriculture and increase risk of drought and wildfires, the study added.
A 2C threshold was set out in the Paris climate agreement in 2015, but the new research suggests it will not be enough to prevent devastating environmental changes.
“It can also lead to more droughts and wildfires – similar to those seen raging across California,” said SusTech scientist Dr Chang-Eui Park, first author of the study published in Nature Climate Change.
The new research involved studying projections based on existing global climate models – mathematical simulations that allow scientists to predict outcomes based on existing information.
The scientists compared the outcomes of 27 different climate models to find the areas of the world that would be hit worst by increased aridity.
Their results indicated that while the 2C target might not be enough to avert an aridification crisis, aiming for the more ambitious target of 1.5C would make a big difference.
“Our research predicts that aridification would emerge over about 20-30 per cent of the world’s land surface by the time the global mean temperature change reaches 2C,” said Dr Manoj Joshi, an environmental scientist at the University of East Anglia.
“But two thirds of the affected regions could avoid significant aridification if warming is limited to 1.5C.”
Many consider the 2C threshold to be overly ambitious, with studies suggesting a 90 per cent chance the planet will reach the mark by the end of the century.
Increasingly, climate scientists are linking the severity of natural disasters like droughts and wildfires to climate change, reports, the Independent.
