Collaborative Research: Investigating Secondary Organic Aerosol (SOA) Formation in Central Los Angeles for Research at the Nexus of Air Quality and Climate Change (CalNex 2010)

合作研究：调查洛杉矶中部二次有机气溶胶 (SOA) 的形成，以研究空气质量与气候变化的关系 (CalNex 2010)

• 批准号: 0931492
• 负责人: Rodney Weber
• 金额: $ 33.66万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0931492&HistoricalAwards=false
• 关键词: Collaborative; Research; Investigating; Secondary; Organic

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The objective of this project is to identify major sources and physico-chemical processes that produce secondary organic aerosol (SOA) in a polluted urban atmosphere. The principal investigators will investigate Los Angeles SOA through participation in the Research at the Nexus of Air Quality and Climate Change (CalNex) 2010 experiment. This project will support the deployment and application of advanced instrumentation and data analysis techniques for chemical characterization of organic trace gases and fine particle organic aerosol in central Los Angeles during a 6-week period in June and July 2010. Highly detailed in-situ chemical speciation of organic aerosol by automated Thermal-desorption Aerosol Gas Chromatograph, and radiocarbon analysis of elemental, organic, water-insoluble, and water-soluble carbon collected on integrated filters will provide unique data to identify sources of SOA precursors. Processes and factors affecting gas/particle partitioning will be explored with instruments capable of measuring both gas- and particle-phase components. A combination of Particle Into Liquid Sampler, Mist Chamber and Total Organic Carbon (TOC) analyzer (PILS/MC/TOC) will comprehensively measure water-soluble gas/particle partitioning. This will be augmented by chemically specific measurements of gas/particle organic acids (PILS/MC/Ion Chromatography), and volatile and semi-volatile organic compounds via high-resolution Proton-Transfer Reaction Time of Flight Mass Spectrometer equipped with a thermal-desorption inlet. These instruments will add to the measurement capabilities at the CalNex central Los Angeles ground site and provide a unique data set for addressing the scientific objective through in-depth data analysis following the experiment. This project will build upon the strong collaboration started in the Study of Organic Aerosols in Riverside (SOAR-2005) to continue investigation of SOA sources and transformation in the urban environment.Development of analytical methods and measurement capabilities, the operation of a wide range of instruments over extended periods, and analysis of the large data sets will require a range in technical ability and make the project well suited for research teams of undergraduate and graduate students, and post-doctoral researches, and promote interaction with researchers from diverse backgrounds and disciplinary areas. Knowledge and experience gained by these co-workers will be valuable to both the atmospheric chemistry and local air quality communities.

该奖项是根据2009年的《美国复苏与重新申请法》（公法111-5）资助的。该项目的目的是确定在污染的城市氛围中产生次要有机气溶胶（SOA）的主要来源和物理化学过程。 首席研究人员将通过参与2010年空气质量和气候变化（Calnex）实验的研究来调查洛杉矶SOA。 This project will support the deployment and application of advanced instrumentation and data analysis techniques for chemical characterization of organic trace gases and fine particle organic aerosol in central Los Angeles during a 6-week period in June and July 2010. Highly detailed in-situ chemical speciation of organic aerosol by automated Thermal-desorption Aerosol Gas Chromatograph, and radiocarbon analysis of elemental, organic, water-insoluble, and water-soluble在集成过滤器上收集的碳将提供独特的数据以识别SOA前体的来源。 将使用能够测量气体和粒子相分量的工具来探索影响气/颗粒分配的过程和因素。 将粒子组合到液体采样器，雾室和总有机碳（TOC）分析仪（PILS/MC/TOC）中，将全面测量水溶性气/颗粒分配。 这将通过化学特异性测量气体/颗粒有机酸（PILS/MC/离子色谱法）以及通过高分辨率质子转移反应时间的挥发性和半挥发性有机化合物来增强这一点。 这些仪器将增加洛杉矶中央地面场地的测量功能，并提供独特的数据集，以通过实验后通过深入的数据分析来解决科学目标。 该项目将基于在河滨有机气溶胶（SOAR-2005）的研究开始的强大合作基础上，以继续调查SOA来源和城市环境中的转型。分析方法和测量能力的发展，在扩展过程中的广泛范围和研究范围内的范围和分析项目的范围和分析将需要进行技术范围和分析。博士后研究，并促进与来自不同背景和纪律领域的研究人员的互动。 这些同事所获得的知识和经验将对大气化学和当地空气质量社区都很有价值。