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.

本项目将研究矿物尘埃颗粒在大气中云滴形成中的作用。 目前的液滴形成理论没有考虑颗粒表面结构和孔隙率的影响。 将使用最先进的实验室技术来量化颗粒表面微观结构对大气中水分吸收和云滴形成的影响。 这项研究将有助于进一步了解与大气有关的矿物颗粒与大气中水汽的相互作用，并改进沙尘-云相互作用的模式以及这些相互作用对天气和气候的影响。（3）应用新的水吸附分析方法对大气表面微结构和孔隙度进行修正，以获得更精确的Frenkel哈尔西希尔吸附活化理论（FHH-AT）拟合参数;（4）将表面微结构和孔隙率校正的基于本体水吸附的CCN活化与气溶胶CCN活化测量进行比较，以建立两种方法之间的实验闭合;以及（5）指导和教育大气化学领域的多样化本科生。该奖项反映了NSF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。

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