Photochemistry of ozone formation in Atlanta, GA-Models and measurements.
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| Title: | Photochemistry of ozone formation in Atlanta, GA-Models and measurements. |
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| Authors: | Sillman, Sanford1, Al-Wali, Khalid I.1, Marsik, Frank J.1, Nowacki, Peter1, Samson, Perry J.1, Rodgers, Michael O.2, Garland, Leslie J.2, Martinez, Jose E.2, Stoneking, Chris2, Imhoff, Robert3, Lee, Jai Hoon4, Newman, Leonard4, Weinstein-Lloyd, Judith5, Aneja, Viney P.6 |
| Source: | Atmospheric Environment. Nov1995, Vol. 29 Issue 21, p3055-3066. 12p. |
| Subject Terms: | *Atmospheric ozone, *Photochemistry, Simulation methods & models, Reactive nitrogen species, Aldehydes |
| Abstract: | Chemical measurements made during an air pollution event in Atlanta, GA have been compared with results from several photochemical simulations. Measurements included O 3 , primary reactive organic gases (ROG), aldehydes, PAN, total reactive nitrogen (NO y ) and H 2 O 2 , with vertical profiles for primary ROG. Photochemical models using two different chemical representations and a range of assumptions about winds, vertical mixing and emissions were used to simulate the event. Results show that assumptions about vertical mixing can cause a variation in simulated surface concentrations of primary hydrocarbons of a factor of two or more. A tendency to underestimate isoprene was found in comparison with measured vertical profiles. The models tend to overestimate concentrations of HCHO, H202 and PAN in comparison with measurements. Peak O 3 and concurrent NO y from helicopter measurements was used as a basis for evaluating individual model scenarios. Scenarios were developed with different O3 NOx- ROG sensitivity, but only the NO x - sensitive scenarios are consistent with measured O 3 , NO y and isoprene. [ABSTRACT FROM AUTHOR] |
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| Database: | GreenFILE |
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