Grace Smith | September 9, 2022
Failure to stop the continuation of global warming will set off five major climate tipping points if warming surpasses 1.5 degrees Celsius, per a new study. Currently, the earth is warming at a level of 1.1 degrees, but if that number hits over 1.5, those disastrous changes will become irreversible.
The study estimates that 1.5 degrees Celsius warming will trigger extreme ice melt for Greenland and West Antarctic ice sheets, which could lead to over 30 feet of sea level rise. Coral reef deaths will occur from 1.5 to 2 degrees, and an important current in the North Atlantic will also stop circulating, impacting weather in Europe. The study also found that larger ocean currents will stop circulating above 2 degrees of global warmth and the Amazon Rainforest will die.
“Since I first assessed tipping points in 2008, the list has grown and our assessment of the risk they pose has increased dramatically,” Tim Lenton told The Guardian. “Our new work provides compelling evidence that the world must radically accelerate decarbonizing the economy.”
To limit warming from 1.5 to 2 degrees Celsius – a 2015 Paris agreement policy that the study indicated is crucial to abide by – all countries must complete promises of cutting greenhouse gas emissions, for there is no leeway or flexibility in not following through.