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: 1723920
• 负责人: Akua Asa-Awuku
• 金额: $ 29.99万
• 依托单位: University of Maryland, College 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 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1723920&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.

该项目正在调查影响大气中云凝结核形成的因素。 诸如颗粒大小和组成的因素可以影响颗粒吸收水并成为云滴的能力。 这项研究将提高对气溶胶和云之间相互作用的理解，气溶胶和云是气候系统中最不确定的方面。这项合作努力的重点是量化相，形态和混合状态对CCN激活和液滴形成在亚饱和和过饱和条件下的贡献。 该项目有以下目标：（1）比较不同相态颗粒的吸湿性测量与传统的吸湿性预测;（2）定义颗粒形态的作用（3）确定不同双组分相系统的颗粒混合状态对吸湿性的影响;（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

Hygroscopicity of polycatechol and polyguaiacol secondary organic aerosol in sub- and supersaturated water vapor environments

亚饱和和过饱和水蒸气环境中聚儿茶酚和聚愈创木酚二次有机气溶胶的吸湿性

• DOI: 10.1039/d1ea00063b
• 发表时间: 2022
• 期刊: Environmental Science: Atmospheres
• 作者: Malek, Kotiba A.;Gohil, Kanishk;Al-Abadleh, Hind A.;Asa-Awuku, Akua A.
• 通讯作者: Asa-Awuku, Akua A.

Hygroscopicity of Internally Mixed Ammonium Sulfate and Secondary Organic Aerosol Particles Formed at Low and High Relative Humidity

低相对湿度和高相对湿度下形成的内部混合硫酸铵和二次有机气溶胶颗粒的吸湿性

• DOI: 10.1039/d1ea00069a
• 发表时间: 2022
• 期刊: Environmental Science: Atmospheres
• 作者: Razafindrambinina, Patricia N;Malek, Kotiba A;Dawson, Joseph Nelson;DiMonte, Kristin;Raymond, Timothy M;Dutcher, Dabrina D;Freedman, Miriam A;Asa-Awuku, Akua
• 通讯作者: Asa-Awuku, Akua

Hygroscopicity and the water-polymer interaction parameter of nano-sized biodegradable hydrophilic substances

• DOI: 10.1080/02786826.2021.1931012
• 发表时间: 2021-06
• 期刊: Aerosol Science and Technology
• 影响因子: 5.2
• 作者: Chunxia Mao;K. Malek;A. Asa-Awuku

Using particle-resolved aerosol model simulations to guide the interpretations of cloud condensation nuclei experimental data

• DOI: 10.1080/02786826.2023.2202741
• 发表时间: 2023-04
• 期刊: Aerosol Science and Technology
• 影响因子: 5.2
• 作者: Patricia N. Razafindrambinina;K. Malek;Anomitra De;Kanishk Gohil;N. Riemer;A. Asa-Awuku

Effects of mixing state on water-uptake properties of ammonium sulfate – Organic mixtures

• DOI: 10.1080/02786826.2022.2114313
• 发表时间: 2022-08
• 期刊: Aerosol Science and Technology
• 影响因子: 5.2
• 作者: Patricia N. Razafindrambinina;K. Malek;Kristine DiMonte;J. Dawson;T. Raymond;D. Dutcher;M. Freedman;A. Asa-Awuku