Exceedance of a specified global warming level, followed by a decline to or below that level during a specified period of time . Sometimes the magnitude and likelihood of the overshoot is also characterized. The overshoot duration can vary from one pathway to the next but in most overshoot pathways in the literature and referred to as overshoot pathways in the AR6, the overshoot occurs over a period of at least one and up to several decades. See also Pathways
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report