Collaborative Research: A Novel Laboratory Approach for Exploring Contact Ice Nucleation

合作研究：探索接触冰核的新实验室方法

• 批准号: 2346198
• 负责人: Margaret Tolbert
• 金额: $ 46.34万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-04-15 至 2027-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2346198&HistoricalAwards=false
• 关键词: Collaborative; Research; Novel; Laboratory; Approach

This project seeks to increase fundamental understanding of the physical mechanisms that drive heterogeneous ice nucleation in the atmosphere, with a particular focus on contact nucleation. Contact nucleation, that occurs after an ice nucleating particle (INP) and a droplet collide, is arguably the least understood mechanism for nucleating ice. Numerical models that incorporate improved mechanisms that represent ice nucleation may lead to more accurate daily weather forecasts and predictions of climate change.This research will address the following science questions: (1) Can methods be established to measure contact ice nucleation reliably? (2) In the contact nucleation process, is it the INP position at a droplet's surface or the collision that is important? (3) What types of aerosols are the most effective INPs? Are they the same in immersion and contact mode nucleation? (4) Does potential INP size matter and can measurement on a substrate represent free-floating droplets?The project will support a postdoc and both graduate and ungraduated students, as well as the development of educational games that focus on atmospheric science for younger students.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.

该项目旨在增加对大气中非均质冰成核的物理机制的基本理解，特别关注接触成核。冰成核粒子（INP）和液滴碰撞后发生的接触成核可以说是最不了解的冰成核机制。数值模式结合改进的机制，代表冰成核可能会导致更准确的每日天气预报和气候变化的预测。这项研究将解决以下科学问题：（1）可以建立可靠的方法来测量接触冰成核？(2)在接触形核过程中，是INP在液滴表面的位置重要还是碰撞重要？(3)什么类型的气溶胶是最有效的INP？它们在浸没和接触模式成核中是相同的吗？(4)潜在的INP尺寸是否重要？在基底上的测量是否能代表自由漂浮的液滴？该项目将支持博士后和研究生和未毕业的学生，以及开发教育游戏，专注于大气科学的年轻学生。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。