RUI: Bulk Water Adsorption and Aerosol Cloud Condensation Nuclei (CCN) Activation of Insoluble Aerosol: Toward Experimental Closure and Accurate Model Parameters

RUI：大量水吸附和不溶性气溶胶的气溶胶云凝结核（CCN）激活：走向实验关闭和准确的模型参数

• 批准号: 1755606
• 负责人: Courtney Hatch
• 金额: $ 54.9万
• 依托单位: Hendrix College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-05-01 至 2022-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1755606&HistoricalAwards=false
• 关键词: RUI; Bulk; Water; Adsorption; Aerosol

This project will investigate the role of mineral dust particles on the formation of cloud droplets in the atmosphere. Current theories of droplet formation have not included the influence of particle surface structure and porosity. State-of-the-art laboratory techniques will be used to quantify the effects of particle surface microstructure on the uptake of water and the formation of cloud droplets in the atmosphere. This research will contribute significantly to the current understanding of how mineral particles of atmospheric relevance interact with water vapor in the atmosphere and lead to improved models of dust-cloud interactions and the influence of these interactions on weather and climate.The specific goals of the studies are: (1) to quantify water adsorption on model insoluble aerosol components as a function of relative humidity (RH); (2) to measure size-resolved cloud condensation nuclei (CCN) activation of the same model aerosol components; (3) to apply new water adsorption analysis methods to correct for surface microstructure and porosity to obtain more accurate Frenkel Halsey Hill Adsorption Activation Theory (FHH-AT) fit parameters; (4) to compare surface microstructure and porosity-corrected bulk water adsorption-based CCN activation to aerosol CCN activation measurements to establish experimental closure between the two methods; and (5) to mentor and educate a diverse cohort of undergraduate students in atmospheric chemistry.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.

该项目将研究矿物粉尘颗粒对大气中云滴形成的作用。 液滴形成的当前理论不包括颗粒表面结构和孔隙率的影响。 最先进的实验室技术将用于量化粒子表面微观结构对水吸收的影响以及大气中云滴的形成。 这项研究将对当前对大气相关性的矿物颗粒与大气中的水蒸气相互作用的理解产生重大贡献，并导致改进的灰尘相互作用的模型以及这些相互作用对天气和气候的影响。 （2）测量相同模型气溶胶成分的尺寸分辨云凝结核（CCN）激活； （3）应用新的水吸附分析方法来校正表面微结构和孔隙率，以获得更准确的Frenkel Halsey Halsey山吸附激活理论（FHH-AT）拟合参数； （4）比较表面微结构和孔隙率校正的大量水吸附的CCN激活与气溶胶CCN激活测量值，以在两种方法之间建立实验闭合； （5）指导和教育大气化学领域的各种本科生。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的影响评估标准，被认为值得通过评估来获得支持。

项目成果

Water Adsorption on Goethite: Experimental Infrared Measurements and Theoretical Adsorption Activation

针铁矿上的水吸附：实验红外测量和理论吸附活化

• 发表时间: 2018
• 期刊: Arkansas Aerospace Proceedings
• 作者: Paul Ryan Tumminello, Rebecca Meredith

Technical note: Frenkel, Halsey and Hill analysis of water on clay minerals: toward closure between cloud condensation nuclei activity and water adsorption

• DOI: 10.5194/acp-19-13581-2019
• 发表时间: 2019-11
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: C. Hatch;Paul R. Tumminello;M. Cassingham;Ann L. Greenaway;R. Meredith;M. J. Christie