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首页> 外文期刊>Environmental Science & Technology >Ozone Formation Potential of Organic Compounds in the Eastern United States: A Comparison of Episodes, Inventories, and Domains
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Ozone Formation Potential of Organic Compounds in the Eastern United States: A Comparison of Episodes, Inventories, and Domains

机译：美国东部有机化合物的臭氧形成潜力：情节，清单和领域的比较

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Direct sensitivity analysis is applied for 3-D assessment of ozone reactivity (or ozone formation potential) in the Eastern United States. A detailed chemical mechanism (SAPRC-99) is implemented in a multiscale air quality model to calculate the reactivity of 32 explicit and 9 lumped compounds. Simulations are carried out for two different episodes and two different emission scenarios. While absolute reactivities of VOCs show a great deal of spatial variability, relative reactivities (normalized to the reactivity of a base mixture) produce a significantly more homogeneous field. Three types of domain-wide relative reactivity metrics are formed for 1-h and 8-h averaging intervals. In general, ozone reactivity metrics (with the exception of those based on daily peak ozone) are fairly robust and consistent between different episodes or emission scenarios. The 3-D metrics also show fairly similar rankings for VOC reactivity when compared to the box model scales. However, the 3-D metrics have a noticeably narrower range for species reactivities, as they result in lower reactivity for some of the more reactive, radical-producing VOCs (especially aldehydes). As expected, episodes and emission scenarios with less radical availability have higher absolute reactivities for all species and higher relative reactivities for the more radical-producing species. Finally, comparing the results with those from a different domain (central California) shows that relative reactivity metrics are comparable over these two significantly different domains.
机译：直接敏感性分析用于美国东部地区的臭氧反应性（或臭氧形成潜力）的3-D评估。在多尺度空气质量模型中实施了详细的化学机制（SAPRC-99），以计算32种显性化合物和9种集总化合物的反应性。针对两个不同的情节和两个不同的排放场景进行了仿真。尽管VOC的绝对反应性显示出很大的空间变异性，但相对反应性（标准化为基础混合物的反应性）会产生更均匀的场。针对1小时和8小时平均间隔，形成了三种类型的全域范围相对反应性度量。一般而言，臭氧反应性指标（基于每日峰值臭氧的指标除外）在各种事件或排放情景之间都非常可靠且一致。与盒式模型标度相比，3-D度量标准还显示了相当相似的VOC反应性等级。但是，3-D度量对于物种反应性的范围明显较窄，因为它们导致某些反应性更高，产生自由基的VOC（尤其是醛）的反应性降低。如预期的那样，自由基可利用性较低的事件和排放情景对所有物种而言具有更高的绝对反应性，而对于产生更多自由基的物种而言具有更高的相对反应性。最后，将结果与来自不同领域（加利福尼亚中部）的结果进行比较表明，相对反应性指标在这两个明显不同的领域中具有可比性。

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