我国南方典型农作物秸秆燃烧烟气老化生成二次有机气溶胶的模拟和观测研究

项目名称： 我国南方典型农作物秸秆燃烧烟气老化生成二次有机气溶胶的模拟和观测研究

项目编号： No.41273116

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 丁翔

作者单位： 中国科学院广州地球化学研究所

项目金额： 80万元

中文摘要： 一次气溶胶老化是二次有机气溶胶(SOA)生成的重要机制，生物质燃烧(BB)是全球最重要一次气溶胶排放源。准确估算BB烟气老化生成SOA的量对研究区域空气质量及全球气候变化有重要意义。然而，缺乏环境因素对老化过程影响的系统模拟，导致老化生成SOA机制不明，模拟获得的化学组成演化趋势与实际大气观测存在较大偏差。本研究以农作物秸秆这一我国突出BB形式为切入点，以我国南方典型农作物秸秆为研究对象，从烟雾箱模拟和野外观测两方面入手，首先获取不同秸秆，不同燃烧方式下烟气老化生成SOA的产率(OA-ER值)和化学组成演化趋势；再通过不同环境因素单一和复合影响下的模拟，明确这些环境因素影响老化过程的机制；最后通过野外观测，对比实际大气和模拟过程中与秸秆燃烧相关的一次和二次标志物演化趋势，并对秸秆烟气老化生成SOA的量进行估算。本研究的开展可为准确估算秸秆烟气老化对大气SOA贡献提供重要的机制和参数化基础。

中文关键词： 生物质燃烧；二次有机气溶胶；老化；萜烯；

英文摘要： The evolution of primary organic aerosol (POA) plays a key role in secondary organic aerosol (SOA) formation. Since biomass burning (BB) is the predominant POA source, it is important to accurately estimate the SOA contribution from BB evolution. However, due to the lack of simulation study focusing on the influence of environmental parameters on the aging process, there is limited knowledge in the aging mechanism and the chemical evolution during aging exhibites dissonance between chamber and the ambient. This study will focus on the smoke aging of straw burning which is the dominated BB type in China. The typical agriculture residues in South China will be selected to do the experiments. First, the organic aerosol enhancement ratio (OA-ER) and the chemical evolution trends during the aging preocess will be obtained based on the chamber simulation of different straws under different combustion conditions. Then, the influence of environmental parameters on smoke aging will be examined to discover the potiental mechanism of aging process on the basis of the simulation under single factor and multiple-factor combined conditions. Finally,field campaigns will be taken in the harvest seasons to check the similarity of chemical evolution (primary and secondary tracers) during smoke aging between chamber and the ambien

英文关键词： Biomass Burning；Secondary Organic Aerosols；Aging；Terpenoids；