Total VOC reactivity in the planetary boundary layer 2. A new indicator for determining the sensitivity of the ozone production to VOC and NO x
Total VOC reactivity in the planetary boundary layer 2. A new indicator for determining the sensitivity of the ozone production to VOC and NO x
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行星边界层中总 VOC 反应性 2. 确定臭氧产生对 VOC 和 NO x 敏感性的新指标
DOI：
10.1029/2000jd900603
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发表时间：
2001
影响因子：
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通讯作者：
B. Calpini
中科院分区：
文献类型：
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作者：
Frank Kirchner;F. Jeanneret;A. Clappier;Bernd Krüger;Hubert van den Bergh;B. Calpini
提出了一种新的检测指标。无论是对流层O3的产生，在特定的区域中受到挥发性有机化合物的限制。(VOC)或NOx。该指标tVOCOH/tNOxOH描述了OH-寿命与通过与VOC和NOx反应而损失的比率。虽然tNOxOH可以通过常规测量获得，但新的泵和探针OH方法也可以获得tVOCOH。高于0.2 ± 50%阈值的指示值代表NOx饱和。条件下，增加NOx排放量导致O3产量降低。对于值<0.01，O3产生。对VOC排放量的变化非常不敏感。该指标对几个参数（温度，湿度、光解、初始O3浓度）在一个箱型模型中进行了测试，并与先前提出的其他指标的稳健性进行了比较。与早先提出的指标不同，这一新指标不是以光化学为基础。产生了长寿的物种，但描述了一个空气包裹的瞬时政权。三维模型表明，该指标对estg是非常成功的。增加或减少排放对O3浓度的影响。对于模型化区域中的每个位置。这将使其成为制定O3减排战略的一个非常有用的工具。
A new indicator is proposed to det. whether tropospheric O3 prodn. in a specific area is limited by volatile org. compds. (VOC) or NOx. This indicator, tVOCOH/tNOxOH, describes the ratio of OH- lifetime vs. losses by reaction with VOC and NOx. Whereas tNOxOH can be obtained by conventional measurements, the new pump and probe OH approach makes it possible to also obtain tVOCOH. Indicator values above a threshold value of 0.2 +- 50% are representative of NOx-satd. conditions, where an increase of NOx emissions causes lower O3 prodn. For values <0.01, O3 prodn. is very insensitive to changes of VOC emissions. The robustness of this indicator against several parameters (temp., humidity, photolysis, initial O3 concn.) was tested in a box model and compared to the robustness of other earlier proposed indicators. In contrast to earlier proposed indicators, this new one is not based on photochem. produced long-lived species, but describes the instantaneous regime of an air parcel. Three-dimensional modeling showed this indicator is quite successful for estg. the impact of increased or reduced emissions on O3 concns. for each location in the modeled area. This will make it a very helpful tool for developing O3 abatement strategies.