On the indicator‐based approach to assess ozone sensitivities and emissions features

摘要: Previous model studies suggested that ambient measurements of key chemical species and ratios could be used to assess the sensitivities ozone formation reductions in precursor emissions. Threshold values these indicator ratios, delineating transition between VOG NOx sensitivity, were proposed. Subsequently, measurement have assumed universality threshold criteria compared local observed indicators with previously established sensitivities. In this study concept is extended combinations observable are consistently associated different site characteristics (e.g., emissions features). The results SARMAP Air Quality Model (SAQM) simulations San Joaquin Valley, California, investigate applicability features. use three (O3/(NOy-NOx), HCHO/NO2 H2O2/HNO3) along SAQM-derived found effective for identifying VOC- or NOx-sensitive regimes. NOy (NOy-NOx)NOy useful describing emission features derived by SAQM prediction. assessing differ from proposed previous using models under conditions. Such differences suggest likely dependent on locations environmental conditions, including patterns rates. Therefore can determine only if appropriate been