Collaborative Research: United States University CLOUD (Cosmics Leaving OUtdoor Droplets) Consortium Membership

合作研究：美国大学 CLOUD（宇宙留下户外水滴）联盟成员

• 批准号: 2215527
• 负责人: Richard Flagan
• 金额: $ 45.47万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2215527&HistoricalAwards=false
• 关键词: Collaborative; Research; United; States; University

This project will support the continued membership of Carnegie Mellon University, the California Institute of Technology, and the University of Colorado at Boulder in the CLOUD consortium at CERN to study the chemistry and physics that drive new-particle formation and growth in Earth's atmosphere. CLOUD is a state-of-the-art 26 cubic meter stainless-steel chamber with precise control over temperature and relative humidity. The new research at CLOUD will focus on the study of chemical mechanisms that generate extremely low volatility organic compounds capable of nucleating and condensing onto freshly nucleated particles. Target environments include natural (both forest and marine) and polluted (urban) conditions, as well as cold temperatures characteristic of the free troposphere. Planned research over the next 3 years, includes studies of: (1) aging of first-generation organic oxidation products under conditions found in the free troposphere; (2) measurement and modeling of key radical intermediates in organic oxidation and also inorganic sulfur, nitrogen, and iodine oxidation, as well as interaction between organic and inorganic systems; (3) measurement and modeling of interactions among vapors and both charged and neutral particles below 10 nm to constrain key microphysical terms; and (4) propagating CLOUD results to atmospheric models, testing their capability to explain field measurements, and understanding the implications of improvements to models for aerosol radiative forcing. In addition to providing the required consortium fee, this project will support shipping and travel to CLOUD experimental campaigns and associated consortium meetings and data workshops. Both doctoral and postdoctoral students associated with the project (supported by other awards) are integrated into an international collaborative network of students and senior researchers who work with some of the most highly regarded scientists in the study of aerosols and 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.

该项目将支持卡内基·梅隆大学，加利福尼亚理工学院和科罗拉多大学云云财团的科罗拉多大学的持续会员资格，以研究驱动地球大气层新粒子形成和增长的化学和物理学。云是最先进的26立方米不锈钢腔室，可精确控制温度和相对湿度。云的新研究将集中在化学机制的研究上，这些化学机制产生了极低的挥发性有机化合物，能够成核和缩合到新鲜成核的颗粒上。目标环境包括天然（森林和海洋）和受污染的（城市）条件，以及自由对流层的寒冷温度。在接下来的三年中，计划的研究包括：（1）在自由对流层中发现的条件下第一代有机氧化产物的老化； （2）在有机氧化以及无机硫，氮和碘氧化以及有机和无机系统之间的相互作用的情况下测量和建模； （3）测量和建模蒸气之间的相互作用以及低于10 nm的带电和中性颗粒，以限制关键的微物理术语； （4）将云结果传播到大气模型，测试其解释现场测量的能力，并了解改进模型对气溶胶辐射强迫的影响。除了提供所需的财团费用外，该项目还将支持运输和前往云实验活动以及相关财团会议和数据研讨会。与该项目相关的博士学位和博士学位学生（由其他奖项支持）都纳入了一个由学生和高级研究人员组成的国际协作网络，这些网络与一些最受尊敬的科学家合作，以研究气溶胶和大气化学研究。这项奖项反映了NSF的法定任务，并通过使用基金会的智力效果和广泛的评估来评估了NSF的法定任务。