Biogenic Volatile Organic Compound (VOC) Emissions from Managed Landscapes and Their Contribution to Atmospheric Ozone and Aerosol

在这个项目中，PI和项目团队试图研究城市和农业景观对生物挥发性有机化合物（BVOC）排放的重要性，以及它们在数值空气质量和气候模型中的表现。该项目将实地和实验室测量与数值模拟（通过更新自然气体和气溶胶排放模型，或MEGAN模型）相结合，以量化管理景观对BVOC排放、空气污染以及与气候相关的气溶胶和氧化剂的作用。MEGAN模型是研究人员和空气质量管理人员广泛使用的社区模型，对该模型的改进将有利于研究界和更广泛的公众。该项目包括资助一名博士后科学家和一名研究生，以及至少三名本科生，将参与一个多学科综合观测和建模项目。总体研究目标是确定和量化控制城市和农业BVOC排放的过程和来源，并描述土地管理做法对大气氧化剂和气溶胶产生的影响。研究小组计划解决三个主要的科学问题：(1)是否有缺失的陆地生态系统源或冠层过程需要包括在数值模型中以准确估计BVOC排放？(2)原生源和次生源对整个生态系统含氧BVOC通量的相对贡献是什么？它们如何响应林冠结构和物种形态的变化？(3)城市和农业景观在多大程度上促进了BVOC的排放？对土地管理措施的排放响应是否会改变区域氧化剂和气溶胶的分布？除了支持一名博士后、一名研究生和一名本科生外，该团队还将准备两项一小时的科学活动，向中学生介绍BVOC排放测量和建模的基础知识，以及如何将其应用于管理景观。该项目旨在为代表性不足的群体提供服务，以证明STEM是一种职业选择。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

In this project, the PI and project team seek to study the importance of urban and agricultural landscapes for biogenic volatile organic compound (BVOC) emissions and their representation within numerical air quality and climate models. This project combines field and laboratory measurements with numerical modeling (via updates to the Model of Emissions of Gases and Aerosols from Nature, or MEGAN, model) in order to quantify the role of managed landscapes on BVOC emissions, air pollution, and climate-relevant aerosols and oxidants. The MEGAN model is a widely used community model used by researchers and air quality managers and improvements to this model will be advantageous to both the research community and the broader public. The project includes funding for a postdoctoral scientist and a graduate student that, along with at least three undergraduate students, will be exposed to a multi-disciplinary integrated observational and modeling project.The overall research goal of is the identification and quantification of processes and sources that control urban and agricultural BVOC emissions and the characterization of the impact of land management practices on atmospheric oxidant and aerosol production. There are three primary scientific questions that the research team plans to address: (1) Are there missing terrestrial ecosystem sources or canopy processes that need to be included in numerical models to accurately estimate BVOC emissions? (2) What are the relative contributions of primary and secondary sources to whole ecosystem oxygenated BVOC fluxes and how do they respond to changes in canopy structure and speciation? (3) To what extent do urban and agricultural landscapes contribute to BVOC emissions and can emission responses to land management practices change regional oxidant and aerosol distributions? In addition to support for a postdoctoral research, a graduate student, and undergraduate students, this team will prepare two one-hour scientific activities to introduce the fundamentals of BVOC emission measurement and modeling to middle school students and how this can be applied in managed landscapes. This program is designed to serve underrepresented groups to demonstrate STEM as a career option.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.