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Science 27 April 2001:
Vol. 292. no. 5517, p. 597
DOI: 10.1126/science.292.5517.597n
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Urban ozone (O3)-control strategies have successfully focused on reducing automobile sources, but large amounts of tropospheric O3 can also be made in rural areas where power plants produce NOx and vegetation produces volatile organic hydrocarbons, two precursors of O3. Ryerson et al. (p. 719) used field measurements from instrumented aircraft to quantify the strong dependence rates and yields of the plume O3 formation on two key variables, power-plant NOx emissions rate and geographic location. The control of tropospheric O3 formation could be significantly enhanced if both NOx emissions concentration and location were considered, rather than only the total amount of NOx emitted.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)