Particle Size Magnifier for Fundamental Nucleation Studies

用于基础成核研究的粒径放大镜

• 批准号: ST/K002120/1
• 负责人: Roy Harrison
• 金额: $ 3.64万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FK002120%2F1
• 关键词: Particle; Size; Magnifier; Fundamental; Nucleation

This proposal is concerned with an atmospheric process referred to as nucleation. The term nucleation refers to the process where molecules of vapour in the air attach together and begin to grow into liquid droplets or solid particles which ultimately become tiny specs of dust in the air. Nucleation processes are important because in some regions of the atmosphere they determine the overall number of particles in the air which itself influences global climate and has implications for human health as breathing airborne particles has been shown to be detrimental to health. In order to study nucleation processes, it is necessary to be able to investigate extremely tiny particles that are associated with the start of the process. Current particle measurement instruments cannot see particles that are this small and consequently a device known as a "particle size magnifier" is needed, and in this project it is planned to purchase a recently developed particle size magnifier instrument and to test its suitability for studying the early stages of nucleation. If it proves successful, then the instrument would be used to study nucleation in an underground laboratory where the influence of cosmic rays on nucleation processes is minimal.

该提案涉及称为成核的大气过程。成核一词是指空气中的蒸气分子附着在一起并开始成长为液滴或固体颗粒，最终成为空气中微小颗粒的过程。成核过程很重要，因为在大气的某些区域，它们决定了空气中颗粒的总数，而空气中颗粒的总数本身就会影响全球气候，并对人类健康产生影响，因为呼吸空气中的颗粒已被证明对健康有害。为了研究成核过程，有必要能够研究与该过程开始相关的极其微小的颗粒。目前的颗粒测量仪器无法看到如此小的颗粒，因此需要一种称为“颗粒尺寸放大器”的设备，在该项目中计划购买最近开发的颗粒尺寸放大器仪器并测试其是否适合研究成核的早期阶段。如果证明成功，那么该仪器将用于在地下实验室中研究成核，那里宇宙射线对成核过程的影响很小。

项目成果

Observations of highly oxidized molecules and particle nucleation in the atmosphere of Beijing

• DOI: 10.5194/acp-19-14933-2019
• 发表时间: 2019-12-10
• 期刊: ATMOSPHERIC CHEMISTRY AND PHYSICS
• 影响因子: 6.3
• 作者: Brean, James;Harrison, Roy M.;Lee, James
• 通讯作者: Lee, James