Earth entering 'uncharted territory' as heat records quickly shatter

[former9thward]

42. If you follow links to links to links you finally get to this footnote.

A.2.2 Global surface temperature has increased faster since 1970 than in any other 50-year period over at least the last 2000
years (high confidence). Temperatures during the most recent decade (2011–2020) exceed those of the most recent
multi-century warm period, around 6500 years ago13 [0.2°C to 1°C relative to 1850–1900] (medium confidence). Prior
to that, the next most recent warm period was about 125,000 years ago, when the multi-century temperature [0.5°C to
1.5°C relative to 1850–1900] overlaps the observations of the most recent decade (medium confidence).
{2.3, Cross-Chapter Box 2.1, Cross-Section Box TS.1} (Figure SPM.1)

https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_SPM.pdf

This claim is rated "medium confidence" which is the lowest confidence level they have for these. Its a guess.