EAGER: Exploring the Ground-Level and Elevated Sources of New Particle Formation Using Aerosol Size- and Hygroscopicity-Resolved Turbulent Flux Measurement Technique

EAGER：利用气溶胶尺寸和吸湿性分辨湍流测量技术探索新颗粒形成的地面和高架来源

• 批准号: 1946340
• 负责人: Nicholas Meskhidze
• 金额: $ 10万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-15 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1946340&HistoricalAwards=false
• 关键词: EAGER; Exploring; Ground; Level; Elevated

This EAGER project is a "proof of concept" effort to evaluate a new method for assessing new particle formation events in the atmosphere. A method has been developed to distinguish between ground-based and elevated sources of ultrafine particles by measuring the vertical fluxes of size-resolved particles and their ability to absorb water. Understanding new particle formation is critical to estimating ground level particle concentrations and designing effective air quality control strategies in urban areas.The objectives of the study are to evaluate if: (1) measurements of eddy covariance and size-selected and hygroscopicity-resolved relaxed eddy accumulation (Hy-RES REA) vertical fluxes of particles can be used to separate ground-level and elevated sources of new particle formation; and (2) residual layer new particle formation events can be unambiguously linked to observed Class B nucleation events (during Class B events the smallest detected particle diameters are larger than about 10 nm in size) detected at the surface. During May of 2020, measurements will be made of size- and hygroscopicity-resolved vertical turbulent aerosol fluxes during 4 different time periods over the day at the Department of Energy's Southern Great Plains (SGP) site in Oklahoma, where a wealth of ancillary data are available, including long-term statistics of the diurnal boundary layer dynamics and diurnal profiles of aerosol number and hygroscopicity.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.

这个渴望的项目是评估一种评估大气中新粒子形成事件的新方法的“概念证明”。 已经开发了一种方法来通过测量尺寸分辨颗粒的垂直通量及其吸收水的能力来区分地面颗粒的地面和升高来源。了解新的粒子形成对于估计城市地区的地面颗粒浓度和设计有效的空气质量控制策略至关重要。 （2）残留层新的粒子形成事件可以明确链接到观察到的B类成核事件（在B类事件期间，最小检测到的粒子直径大于大约10 nm的大小）。 During May of 2020, measurements will be made of size- and hygroscopicity-resolved vertical turbulent aerosol fluxes during 4 different time periods over the day at the Department of Energy's Southern Great Plains (SGP) site in Oklahoma, where a wealth of ancillary data are available, including long-term statistics of the diurnal boundary layer dynamics and diurnal profiles of aerosol number and hygroscopicity.This award reflects NSF的法定使命，并使用基金会的知识分子优点和更广泛的影响审查标准来评估值得支持。