'COP31: what the Paris temperature goal actually measures'
· BehindLines newsroom
COP31 is scheduled for 9 to 20 November in Antalya, Turkey. To make sense of climate announcements during this period, one distinction helps: a single year’s temperature and the Paris Agreement’s long-term goal do not measure the same thing.
Two dates, two reference points
The treaty was adopted on 12 December 2015 and entered into force on 4 November 2016. Ten years have therefore passed since it took effect. It aims to hold warming well below 2 °C above pre-industrial levels while pursuing efforts to limit it to 1.5 °C.
That figure is not a temperature ceiling for every day, country or individual year. In its report on 2024, published in March 2025, the World Meteorological Organization already distinguished annual records from warming assessed over several decades. That methodological distinction remains essential; the cited report is not an assessment of 2026.
Measuring action as well
The agreement establishes a cycle of national plans renewed every five years, with ambition intended to increase. These contributions describe proposed measures to cut emissions and strengthen adaptation. A transparency framework also helps examine actions, progress and support.
Following the conference therefore requires looking at several stages: what a country announces, what it actually implements, and what the data allow us to observe. Confusing these levels would treat a promise as equivalent to a result.
The framework has a practical use: one annual record cannot summarize the treaty’s condition, and the treaty’s existence does not prove that efforts are sufficient. An assessment depends both on climate trends and on implementation of commitments. The announced conference provides a meeting at which to examine them; its outcome is still to come.