Collaborative Research: Chemistry-Informed Ice Nucleation and Growth--Integrated Laboratory and Modeling Studies

本次合作研究项目的项目团队将结合实验室实验和数值模拟，研究浸入溶液液滴中的冰成核粒子的化学性质如何影响冰成核过程和随后的冰生长。在冰成核粒子的化学方面存在许多不确定性和知识空白，主要与理解冰成核和晶体生长的敏感性有关，因为它与冷冻液滴的化学成分有关。这项研究将开发一个详细的实验信息建模框架，旨在填补这些空白。研究包括实验室实验和建模工作，这些工作将同时进行。教育视频将由专业的天气通讯团队制作，并在网上和当地公共电视台分享。在这个项目中，研究生和本科生都将得到培训和整合。项目组将把实验室实验（包括成核和生长实验）与现有的冰晶生长、气溶胶演化和冰成核模型结合起来。该项目的具体任务包括：(1)利用随机和确定性建模框架，对矿物粉尘和生物类似物内部与酸或盐混合的冰核进行表征；(2)这些系统中冰的生长特征；(3)改进冰核参数化的发展；(4)基于气溶胶的拉格朗日粒子模型中冰生长参数化的发展。外展和教育视频将与宾夕法尼亚州立大学天气通信小组合作制作。更多的宣传活动将通过在当地公共电视台播出的“天气世界”节目进行。该奖项反映了美国国家科学基金会的法定使命，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。

The project team in this collaborative research project will combine laboratory experiments with numerical modeling in order to study how the chemistry of ice nucleating particles immersed in solution droplets impact the ice nucleation process and subsequent ice growth. There are many existing uncertainties and knowledge gaps related to the chemistry of ice nucleating particles, primarily associated with understanding the sensitivity of ice nucleation and crystal growth as it relates to the chemical composition of freezing droplets. This research will develop a detailed experiment-informed modeling framework that aims to fill these gaps. The research includes laboratory experiments and modeling work that will be done concurrently. Educational videos will be produced with a professional weather communication team that will be shared online and on local public television stations. Both graduate and undergraduate students will be trained and integrated during this project.The project team will combine laboratory experiments, including both nucleation and growth experiments, with existing ice crystal growth, aerosol evolution, and ice nucleation models. The specific tasks in this project include: (1) the characterization of ice nucleation of mineral dust and biological analogs internally mixed with acids or salts using both stochastic and deterministic modeling frameworks; (2) the characterization of ice growth in these same systems; (3) the development of improved ice nucleation parameterizations; and (4) the development of ice growth parameterizations for aerosol-based Lagrangian particle models. Outreach and educational videos will be produced in collaboration with the Pennsylvania State University Weather Communications Group. Additional outreach will be made via the Weather World program that airs on local public television stations.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.