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首页> 外文期刊>Atmospheric chemistry and physics >Process analysis and sensitivity study of regional ozone formation over the Pearl river delta, China, during the PRIDE-PRD2004 campaign using the community multiscale air quality modeling system
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Process analysis and sensitivity study of regional ozone formation over the Pearl river delta, China, during the PRIDE-PRD2004 campaign using the community multiscale air quality modeling system

机译：利用社区多尺度空气质量建模系统在PRIDE-PRD2004活动期间，中国珠江三角洲区域臭氧形成的过程分析和敏感性研究

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In this study, the Community Multiscale Air Quality (CMAQ) modeling system is used to simulate the ozone (O_3) episodes during the Program of Regional Integrated Experiments of Air Quality over the Pearl River Delta, China, in October 2004 (PRIDE-PRD2004). The simulation suggests that O _3 pollution is a regional phenomenon in the Pearl River Delta (PRD). Elevated O_3 levels often occurred in the southwestern inland PRD, Pearl River estuary (PRE), and southern coastal areas during the 1-month field campaign. Three evolution patterns of simulated surface O_3 are summarized based on different near-ground flow conditions. More than 75% of days featured interactions between weak synoptic forcing and local sea-land circulation. Integrated process rate (IPR) analysis shows that photochemical production is a dominant contributor to O_3 enhancement from 09:00 to 15:00 local standard time in the atmospheric boundary layer over most areas with elevated O_3 occurrence in the mid-afternoon. The simulated ozone production efficiency is 2-8 O_3 molecules per NO_x molecule oxidized in areas with high O_3 chemical production. Precursors of O_3 originating from different source regions in the central PRD are mixed during the course of transport to downwind rural areas during nighttime and early morning, where they then contribute to the daytime O_3 photochemical production. The sea-land circulation plays an important role on the regional O_3 formation and distribution over PRD. Sensitivity studies suggest that O_3 formation is volatile-organic-compound- limited in the central inland PRD, PRE, and surrounding coastal areas with less chemical aging (NO_x/NO_y≥0.6), but is NO _x-limited in the rural southwestern PRD with aged air (NO _x/NO_y<0.3).
机译：在这项研究中，社区多尺度空气质量（CMAQ）建模系统用于模拟2004年10月中国珠江三角洲的空气质量区域综合实验计划（PRIDE-PRD2004）中的臭氧（O_3）发作。 。模拟表明，O _3污染是珠江三角洲（PRD）的一种区域性现象。在为期1个月的野战期间，西南内陆珠三角，珠江口（PRE）和南部沿海地区经常发生O_3升高的现象。根据不同的近地流动条件，总结了模拟表面O_3的三种演化模式。超过75％的日子表现为天气强迫和局部海陆环流之间存在相互作用。综合过程速率（IPR）分析表明，在大多数午后O_3发生率升高的地区，从大气标准层的09:00到15:00当地标准时间，光化学生产是O_3增强的主要推动力。模拟的臭氧生产效率是在高O_3化学品产量的区域中每个NO_x分子氧化2-8 O_3分子。源自珠三角中部不同来源地区的O_3前体在夜间和清晨运输到顺风地区的过程中混合在一起，然后在白天为O_3光化学物质的生产做出贡献。海陆环流对珠三角区域O_3的形成和分布起着重要作用。敏感性研究表明，O_3的形成在中部内陆PRD，PRE和周围沿海地区具有有限的化学老化（NO_x /NO_y≥0.6），而在西南PRD的农村地区则不受NO _x限制老化的空气（NO _x / NO_y <0.3）。

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