Table 1.

Fraction of the Earth defined as pristine

Month	Pristine Fraction
	Global	Ocean	Land	NH	SH
Jan	0.27 (0.32)	0.34 (0.40)	0.09 (0.13)	0.02 (0.06)	0.53 (0.59)
Apr	0.18 (0.25)	0.21 (0.30)	0.08 (0.12)	0.00 (0.03)	0.35 (0.46)
Jul	0.05 (0.14)	0.06 (0.16)	0.02 (0.08)	0.06 (0.15)	0.04 (0.13)
Oct	0.05 (0.11)	0.07 (0.14)	0.01 (0.05)	0.03 (0.09)	0.07 (0.13)
Annual	0.12 (0.21)	0.16 (0.26)	0.02 (0.10)	0.02 (0.08)	0.22 (0.34)

Pristine defined as PI to PD CCN concentration ±20% and similar PI to PD CCN response to 28 parameters covering natural and anthropogenic emissions, processes and model structures. Values in parentheses show the fraction when the concentration change only is considered.