Model correlations for ozone, reactive nitrogen, and peroxides for Nashville in comparison with measurements: Implications for O3-NOx-hydrocarbon chemistry
| Autor: | Margaret Pippin, Dongyang He, Judith Weinstein-Lloyd, Lawrence I. Kleinman, Daniel G. Imre, Peter H. Daum, Sanford Sillman, J. H. Lee |
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| Rok vydání: | 1998 |
| Předmět: |
Atmospheric Science
Ozone Reactive nitrogen Analytical chemistry Soil Science Mineralogy Aquatic Science Oceanography Reaction rate chemistry.chemical_compound Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Volatile organic compound NOx Earth-Surface Processes Water Science and Technology chemistry.chemical_classification Ecology Paleontology Forestry Plume Geophysics Hydrocarbon chemistry Space and Planetary Science Nitrogen oxide |
| Zdroj: | Journal of Geophysical Research: Atmospheres. 103:22629-22644 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/98jd00349 |
| Popis: | We present an analysis of correlations between O 3 , NO x reaction products (NO 2 ), and peroxides in photochemical models for polluted environments in comparison with measurements in the vicinity of Nashville, Tennessee. This analysis is associated with the use of O 3 /NO z , H 2 O 2 /NO z , and similar ratios as indicators for the relative impact of NO x and hydrocarbons (volatile organic compounds, VOC) on ozone formation. The measurements are used both to evaluate the NO x -VOC indicator theory and to identify NO x -VOC chemistry in Nashville. Results show that a linear correlation exists between O 3 and the sum 2H 2 O 2 +NO z , consistent between models and measurements. The ratio O 3 /2H 2 O 2 +NO z has a near-constant value in both the Nashville urban plume and surrounding rural area. A similar correlation is found with total peroxides (O 3 versus 2peroxides+NO z ) but with greater scatter. The correlations between O 3 , NO z , and peroxides are consistent with an assumed dry deposition rate of 5 cm s -1 for H 2 O 2 and HNO 3 . Changes in dry deposition and RO 2 reaction rates cause minor adjustments in the NO x -VOC-indicator analysis for H 2 O 2 /NO z . Measured indicator ratios for Nashville are close to the NO x -VOC transition predicted by models and form an intermediate point between previous measurements for Atlanta (NO x sensitive) and Los Angeles (VOC sensitive). The model ozone production efficiency (P(O 3 )/L(NO x )) is 3-4, significantly lower than would be derived from the O 3 -NO z slope (5-8). |
| Databáze: | OpenAIRE |
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