Ground-level Ozone Formation

Volatile Organic Compounds (VOCs)

Nitrogen Oxides (NOx)

Fuels, Paints, Solvents, &

Vegetation

Combustion Processes

Ozone (O3)Smog+

Photochemical Processes Leading to O3 and PMAn Assessment of Tropospheric Ozone Pollution, A North American Perspective, NARSTO, National Acad. Press, 2000.

20

15

10

5

0

Conc

entr

atio

n, µ

g/m

3

8/15/99 8/17/99 8/19/99 8/21/99 8/23/99Eastern Standard Time

35

30

25

20

15

10

5

0

Temp. °C

nitric acid nitrate

Temperature

NO3- HNO3

Atlanta August 1999

Ozone Production From Aromatics

Terpine Reaction with O3