Collaborative Research: Effects of Aerosol Phase, Morphology, and Mixing State on Droplet Formation

合作研究：气溶胶相、形态和混合状态对液滴形成的影响

• 批准号: 1723290
• 负责人: Miriam Freedman
• 金额: $ 29.93万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1723290&HistoricalAwards=false
• 关键词: Collaborative; Research; Effects; Aerosol; Phase

This project is investigating factors that affect the formation of cloud condensation nuclei (CCN) in the atmosphere. Factors such as particle size and composition can influence the ability of a particle to uptake water and become a cloud droplet. This research will improve understanding of the interactions between aerosols and clouds, that are the most uncertain aspect of the climate system.This collaborative effort focuses on quantifying the contribution of phase, morphology, and mixing state to CCN activation and droplet formation at subsaturated and supersaturated conditions. The project has the following objectives: (1) Compare hygroscopicity measurements with traditional hygroscopicity predictions for particles with different phase states; (2) Define the role of particle morphology (specifically changes in phase-separating systems) for particle water-uptake; (3) Determine the effect of particle mixing state of varying two-component phase systems for hygroscopicity; and (4) Develop models and software to interpret mixed phase state and morphology CCN activation curves. The collaboration includes a diverse group of early career scientists and will support the participation of both graduate and undergraduate students.

该项目正在研究影响大气中云凝结核(CCN)形成的因素。颗粒的大小和组成等因素会影响颗粒吸收水分并形成云滴的能力。这项研究将提高对气溶胶和云之间的相互作用的理解，这是气候系统中最不确定的方面。这一合作努力集中在量化相、形态和混合状态对过饱和和过饱和条件下CCN激活和液滴形成的贡献。该项目有以下目标：(1)比较不同相态颗粒的吸湿率测量与传统吸湿率预测；(2)确定颗粒形态(特别是相分离系统中的变化)对颗粒吸水率的作用；(3)确定不同双组分相体系的颗粒混合状态对吸湿性的影响；以及(4)开发解释混合相态和形态CCN活化曲线的模型和软件。该合作包括一组不同的早期职业科学家，并将支持研究生和本科生的参与。

项目成果

Effect of Particle Morphology on Cloud Condensation Nuclei Activity

• DOI: 10.1021/acsearthspacechem.7b00146
• 发表时间: 2018-06-01
• 期刊: ACS EARTH AND SPACE CHEMISTRY
• 影响因子: 3.4
• 作者: Altaft, Muhammad Bilal;Dutcher, Dabrina D.;Freedman, Miriam Arak
• 通讯作者: Freedman, Miriam Arak

Direct Comparison of the Submicron Aerosol Hygroscopicity of Water-Soluble Sugars

• DOI: 10.1021/acsearthspacechem.0c00159
• 发表时间: 2020-12-17
• 期刊: ACS EARTH AND SPACE CHEMISTRY
• 影响因子: 3.4
• 作者: Dawson, Joseph Nelson;Malek, Kotiba A.;Freedman, Miriam Arak
• 通讯作者: Freedman, Miriam Arak