Table 1.

List of symbols used with definitions and units.

Symbol	Definition	Units
ϕX	emission rates of given VOC	nmol m-2 s-1
ϕM1, X	maximum emission rate at the first emission peak	nmol m-2 s-1
ϕM2, X	maximum emission rate at the second emission peak	nmol m-2 s-1
ФX	the total amount of given VOC emitted over a certain time	µmol m-2
tP1S	start of the first emission burst since the start of the O3 exposure	h
tP1E	end of the first emission burst since the start of the O3 exposure	h
tP2S	start of the second emission burst since the start of the O3 exposure	h
tP2E	end of the second emission burst since the start of the O3 exposure	h
DP1	duration of the first induced emission peak	h
DP2	duration of the second induced emission peak	h
tE1	time from the onset of O3 exposure to the first emission elicitation	h
tE2	time from the onset of O3 exposure to the second emission elicitation	h
tM1	time from elicitation to the first emission maximum	h
tM2	time from elicitation to the second emission maximum	h
τI1	doubling-time for the increase of emissions during the first emission burst	h
τD1	half-time for the decrease of emissions during the second emission burst	h
τI2	doubling-time for the increase of emissions during the second emission burst	h
τD2	half-time for the decrease of emissions during the second emission burst	h
kI1	rate constant for the initial increase of emissions during the first emission burst	h-1
kD1	rate constant for the decrease of emissions during the first emission burst	h-1
kI2	rate constant for the initial increase of emissions during the second emission burst	h-1
kD2	rate constant for the decrease of emissions during the second emission burst	h-1
ϕO3	the rate of ozone uptake by stomata	nmol m-2 s-1
ФO3	the total amount of ozone uptake by stomata	µmol m-2
ϕLO3	the rate of ozone uptake by whole leaf	nmol m-2 s-1
ФLO3	the total amount of ozone uptake by whole leaf	µmol m-2

Fig. 1 demonstrates representative time courses of emissions and definition of symbols.