2025 is now projected to be the second or third warmest year on record, surpassed only by 2024, the hottest year so far, when global temperatures reached 1.6°C above pre-industrial levels.
Although the long-term global warming trend so far remains below the Paris Agreement’s 1.5°C target, current emission trajectories suggest with relative certainty that we will surpass 1.5°C in the near future.
The Intergovernmental Panel on Climate Change (IPCC) defines the temporary exceedance and return to the 1.5°C as “overshoot”.
Overshoot brings several new governance challenges, including the need for more mitigation actions as emissions must be reduced to achieve net-zero and net-negativity to return to 1.5°C as quickly as possible.
The Intergovernmental Panel on Climate Change (IPCC) defines the temporary exceedance and return to the 1.5°C as “overshoot”.
Author summary: Global temperatures to surpass 1.5°C target.