Collaborative Research: Characterizing the Cloud Formation Properties of Secondary Organic Aerosol (SOA) Formed from Aqueous Multiphase Chemical Processes

合作研究：表征水相多相化学过程形成的二次有机气溶胶 (SOA) 的云形成特性

• 批准号: 2131369
• 负责人: Yue Zhang
• 金额: $ 36.23万
• 依托单位: Texas A&M University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-10-01 至 2024-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2131369&HistoricalAwards=false
• 关键词: Collaborative; Research; Characterizing; Cloud; Formation

The goal of this project is to examine the climate effects of organosulfate-containing secondary organic aerosol (SOA) by investigating their chemical composition, morphology, and phase state in a laboratory setting, and by parameterizing the resultant data for the prediction of aerosol-cloud interactions. The hypothesis is that certain biogenic volatile organic compound-derived SOA enhanced by aqueous reactions within acidic sulfate aerosol, will serve as more effective ice nuclei particle (INP) and less effective cloud condensation nuclei (CCN), due to the production of highly viscous and less hygroscopic organosulfates. This research is expected to help improve the understanding of how aerosols impact cloud formation and cloud properties and will contribute to reducing the uncertainties in predicting future climate.Organosulfate-rich SOA produced from the oxidation of isoprene, β-caryophyllene, and α-pinene, as well as authentic organosulfates (OSs) synthesized at the University of North Carolina, will be systematically examined for their INP and CCN properties during this project. Chemical characterization methods will be used to identify the key species in the OS-rich SOA that alter their INP and CCN properties. The primary objectives of this research are to: (1) determine how chemical composition, phase state, and morphology affect the CCN and INP activities of OS-rich SOA; (2) measure and quantify how the chemical composition and phase state affect the cloud activation properties of OS-rich SOA during atmospheric aging by heterogeneous hydroxyl radical oxidation; and (3) develop parameterizations in order to generalize the effects of SOA chemical composition, phase and mixing state on the CCN/IN potential of these particles for potential model simulations and field data comparison.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目的目的是通过在实验室环境中研究其化学组成，形态和相状态，并通过参数为Aerosol-Cloud相互作用的预测进行参数数据，来检查含有有机硫酸盐的二次有机气溶胶（SOA）的气候影响。假设是，由于酸性硫酸盐气溶胶中的水反应增强了某些生物挥发性有机化合物衍生的SOA，这将是更有效的冰核颗粒（INP），并且由于产生高度粘性和较少的湿润型有机体硫酸盐，因此将成为更有效的冰核颗粒（INP）。预计这项研究将有助于提高对气溶胶如何影响云形成和云特性的理解，并将有助于减少预测未来气候的不确定性。欧洲硫酸盐富含富含氧化的SOA，是由异戊二烯，β-蛋黄烯丙烯和α-二烯和α-二烯以及α-二烯的氧化氧化产生的，以及对北部的北极脉冲（oss）的北方孔（OSS），北部的北非。该项目期间的INP和CCN属性。化学表征方法将用于识别OS-rich SOA中的关键物种，以改变其INP和CCN特性。这项研究的主要目标是：（1）确定化学组成，相状态和形态如何影响OS-RICH SOA的CCN和INP活性； （2）测量和量化化学成分和相状态如何影响OS-rich SOA在大气老化期间通过异质羟基自由基氧化的云激活特性； （3）为了推广SOA化学组成，相位和混合状态对CCN/对这些粒子潜在的潜在模型模拟和现场数据比较的潜在影响的影响。该奖项反映了NSF的法定任务，并认为使用基金会的知识和更广泛的影响审查Criteria，通过评估来进行评估。

项目成果

Synthetic strategies for oxidation products from biogenic volatile organic compounds in the atmosphere: A review

• DOI: 10.1016/j.atmosenv.2023.120017
• 发表时间: 2023-08
• 期刊: Atmospheric Environment
• 影响因子: 5
• 作者: Sahir Gagan;Kumar Sarang;K. Rudzinski;Rui-Yuan Liu;R. Szmigielski;Yue Zhang