Table 1.

The verbal likelihood scale developed by the IPCC (2010) with the colour coding developed by Kloprogge et al. (2007).

Calibrated phrase	Likelihood of outcome	Colour coding
Virtually certain	99–100% probability	Green
Very likely	90–100% probability	Green
Likely	66–100% probability	Green
About as likely as not	33–66% probability	Amber
Unlikely	0–33% probability	Red
Very unlikely	0–10% probability	Red
Exceptionally unlikely	0–1% probability	Red