Estimated anthropogenic warming from a linear relationship between temperature and atmospheric CO 2

Assessing compliance with the anthropogenic warming target of the Paris Agreement requires transparent, reliable and timely metrics. Linearity between increases in atmospheric CO ₂ and temperature offers a framework that appears to meet these criteria and produces estimates of anthropogenic warming that are at least 30 % more certain than alternative methods. Here, for the year 2023, we estimate that humans have caused a global increase of 1.49 ± 0.11 °C relative to the pre-1700 baseline. (Andrew Jarvis & Piers M. Forster, more at phys.org)