...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric chemistry and physics >VOC emissions, evolutions and contributions to SOA formation at a receptor site in eastern China
【24h】

VOC emissions, evolutions and contributions to SOA formation at a receptor site in eastern China

机译：中国东部接收点的VOC排放，演变及其对SOA形成的贡献

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Volatile organic compounds (VOCs) were measured by two online instruments (GC-FID/MS and PTR-MS) at a receptor site on Changdao Island (37.99 N, 120.70 E) in eastern China. Reaction with OH radical dominated chemical losses of most VOC species during the Changdao campaign. A photochemical-age-based parameterization method is used to calculate VOC emission ratios and to quantify the evolution of ambient VOCs. The calculated emission ratios of most hydrocarbons agree well with those obtained from emission inventory data, but determined emission ratios of oxygenated VOCs (OVOCs) are significantly higher than those from emission inventory data. The photochemical-age-based parameterization method is also used to investigate primary emissions and secondary formation of organic aerosol. The primary emission ratio of organic aerosol (OA) to CO is determined to be 14.9 μg m-3 ppm-1, and secondary organic aeorosols (SOA) are produced at an enhancement ratio of 18.8 μg m-3 ppm-1 to CO after 50 h of photochemical processing in the atmosphere. SOA formation is significantly higher than the level determined from VOC oxidation under both high-NO_x (2.0 μg m~(-3) ppm~(-1) CO) and low-NO_x conditions (6.5 μg m~(-3) ppm~(-1) CO). Polycyclic aromatic hydrocarbons (PAHs) and higher alkanes (> C10) account for as high as 17.4% of SOA formation, which suggests semi-volatile organic compounds (SVOCs) may be a large contributor to SOA formation during the Changdao campaign. The SOA formation potential of primary VOC emissions determined from field campaigns in Beijing and Pearl River Delta (PRD) is lower than the measured SOA levels reported in the two regions, indicating SOA formation is also beyond explainable by VOC oxidation in the two city clusters.
机译：通过两种在线仪器（GC-FID / MS和PTR-MS）在中国东部长岛（37.99 N，120.70 E）的一个接收点测量了挥发性有机化合物（VOC）。在长岛战役期间，与OH自由基的反应主导了大多数VOC物种的化学损失。基于光化学年龄的参数化方法用于计算VOC排放比并量化环境VOC的演变。计算出的大多数碳氢化合物的排放比率与从排放清单数据获得的排放比率非常吻合，但是确定的氧化VOC（OVOC）排放比率明显高于从排放清单数据得出的比率。基于光化学年龄的参数化方法还用于研究有机气溶胶的一次排放和二次形成。确定的有机气溶胶（OA）与CO的一次排放比为14.9μgm-3 ppm-1，生产后以18.8μgm-3 ppm-1与CO的增强比产生次要有机气溶胶（SOA）。在大气中进行50 h的光化学处理。在高NO_x（2.0μgm〜（-3）ppm〜（-1）CO）和低NO_x条件下（6.5μgm〜（-3）ppm〜的情况下），SOA的形成明显高于VOC氧化确定的水平。 （-1）CO）。多环芳烃（PAH）和高级烷烃（> C10）占SOA形成的17.4％，这表明在长岛战役期间半挥发性有机化合物（SVOC）可能是SOA形成的主要因素。通过北京和珠江三角洲（PRD）的野外活动确定的主要VOC排放的SOA形成潜力低于在两个地区报告的实测SOA水平，这表明两个城市集群中的VOC氧化也无法解释SOA形成。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号