Alternative Approaches to Diagnosing Ozone Production Regime
Effective formulation of control strategies requires knowledge of the responsiveness of ozone to emissions of its two main precursors, nitrogen oxides (NOx) and volatile organic compounds (VOC). While responsiveness depends nonlinearly on an array of spatially and temporally variable factors, a large body of research has sought to classify ozone formation into categories of chemical regime (Sillman, 1999). In NOx-limited regimes, ozone increases with increasing NOx and exhibits only slight sensitivity to VOC; in VOC-limited (or NOx-saturated) regimes, ozone increases with VOC and exhibits slight or even negative sensitivity to NOx. Transitional conditions of dual sensitivity also occur. Classification of ozone production regime helps determine whether NOx or VOC emissions should be targeted more aggressively in strategies to reduce ozone.
KeywordsVolatile Organic Compound Ozone Production Local Emission Volatile Organic Compound Emission Biogenic Volatile Organic Compound
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