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.

该项目旨在增进对驱动大气中异质冰成核的物理机制的基本了解，特别关注接触成核。接触成核是在冰成核颗粒（INP）和液滴碰撞后发生的，可以说是人们最不了解的冰成核机制。包含代表冰成核的改进机制的数值模型可能会带来更准确的每日天气预报和气候变化预测。这项研究将解决以下科学问题：（1）能否建立可靠地测量接触冰成核的方法？ (2) 在接触成核过程中，液滴表面的INP位置重要还是碰撞重要？ (3) 哪些类型的气溶胶是最有效的 INP？它们在浸入式成核和接触式成核中是否相同？ (4) 潜在的 INP 尺寸重要吗？基底上的测量是否可以代表自由漂浮的液滴？该项目将支持博士后、研究生和本科生，以及针对年轻学生开发专注于大气科学的教育游戏。该奖项反映了 NSF 的法定使命，并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，被认为值得支持。