Integrating Observational Constraints and Modeling of Atmospheric Reactive Organic Carbon

整合大气反应性有机碳的观测约束和建模

• 批准号: 1936642
• 负责人: Colette Heald
• 金额: $ 59.88万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936642&HistoricalAwards=false
• 关键词: Integrating; Observational; Constraints; Modeling; Atmospheric

This project is designed to improve the modeling of reactive organic carbon in the atmosphere. Reactive organic carbon species play a central role in controlling the overall composition of the troposphere. The oxidation of organic carbon ultimately leads to the formation of organic aerosol, ozone, and carbon dioxide, and is therefore of critical importance to understanding the formation of air pollution and the causes of climate change. This research is designed to improve the understanding of the role of reactive organic carbon in tropospheric chemistry, and to provide significant improvements to the GEOS-Chem model, leading to more accurate information for policy decisions regarding air quality and climate. The two overarching goals for this project are to assess the key contributors to reactive organic carbon (ROC) mass and reactivity in both observations and models, and to improve model descriptions of ROC and test these against observations. This project will synthesize past and on-going field measurements to explore new concepts and as a means of testing model schemes.The revised research plan includes the following tasks: (1) Observationally characterize and contrast the ROC mass concentrations and OH reactivity observed during two recent field campaigns in the United States; (2) Improve a global model description of ROC processing, with a focus on photochemical loss of organic aerosol; (3) Improve a global model description of ROC chemistry, with a focus on monoterpene oxidation chemistry; (4) Assess the characteristics of OH and NO3 reactivity as represented by a global model; and (5) Use Zeppelin measurements to test the model representation of ROC and OH reactivity over Europe.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.

该项目旨在改善大气中反应性有机碳的建模。反应性有机碳物种在控制对流层的整体组成中起着核心作用。有机碳的氧化最终导致有机气溶胶，臭氧和二氧化碳的形成，因此对于理解空气污染的形成和气候变化的原因至关重要。这项研究旨在提高对对流层化学中反应性有机碳的作用的理解，并为GEOS-CHEM模型提供了重大改进，从而为有关空气质量和气候的政策决策提供了更准确的信息。 该项目的两个总体目标是评估观测和模型中反应性有机碳（ROC）质量和反应性的关键因素，并改善ROC的模型描述并针对观察结果进行测试。该项目将综合过去和正在进行的现场测量值，以探索新概念和测试模型方案的一种手段。修订后的研究计划包括以下任务：（1）观察表征和对比ROC质量浓度和OH的反应性，在美国最近的两个领域活动中观察到了OH； （2）改善ROC加工的全球模型描述，重点是有机气溶胶的光化学损失； （3）改善ROC化学的全球模型描述，重点是单二烯氧化化学； （4）评估由全球模型表示的OH和NO3反应性的特征； （5）使用Zeppelin测量值测试ROC和OH反应性的模型表示。该奖项反映了NSF的法定任务，并使用基金会的智力优点和更广泛的审查标准，被认为值得通过评估来获得支持。

项目成果

An improved representation of fire non-methane organic gases (NMOGs) in models: emissions to reactivity

• DOI: 10.5194/acp-22-12093-2022
• 发表时间: 2022-09
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: T. Carter;C. Heald;J. Kroll;E. Apel;D. Blake;M. Coggon;A. Edtbauer;G. Gkatzelis;R. Hornbrook;J. Peischl;E. Pfannerstill;F. Piel;Nina G. Reijrink;A. Ringsdorf;C. Warneke;Jonathan Williams;A. Wisthaler;Lu Xu

The complex chemical effects of COVID-19 shutdowns on air quality

• DOI: 10.1038/s41557-020-0535-z
• 发表时间: 2020-09-01
• 期刊: NATURE CHEMISTRY
• 影响因子: 21.8
• 作者: Kroll, Jesse H.;Heald, Colette L.;Steiner, Allison L.
• 通讯作者: Steiner, Allison L.