Table 1. Pearson correlation coefficients of the investigated variables.

Variable	Pearson correlation (r)
	log(isoprene emission	log(O3 uptake)	[O3]	Rg	Airt
log(isoprene emission	1	0.45	0.46	0.59	0.65
log(O3 uptake)	0.45	1	0.49	0.32	0.36
[O3]	0.46	0.49	1	0.34	0.55
Rg	0.59	0.32	0.34	1	0.45
Airt	0.65	0.36	0.55	0.45	1

For isoprene emission and ozone uptake Pearson correlations of the log-transformed values were calculated since these variables were highly non-normal. This log transformation reversed the sign of the correlations for O₃ uptake. log(isoprene emission) = logarithm of isoprene emission (nmol m⁻² s⁻¹). log(O₃ uptake) = logarithm of O₃ uptake (nmol m⁻² s⁻¹). O₃ uptake = total ozone uptake (nmol m⁻² s⁻¹). [O₃] = ozone concentration (ppb). Rg = short-wave incoming radiation (W m⁻²). Air_t = air temperature (°C).