Investigating the mechanism of ice nucleation by size-fractionated macromolecules found in ambient aerosols in the UK and in Canada.

研究英国和加拿大环境气溶胶中发现的尺寸分级大分子的冰成核机制。

• 批准号: NE/V019740/1
• 负责人: Benjamin Murray
• 金额: $ 1.45万
• 依托单位: University of Leeds
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FV019740%2F1
• 关键词: Investigating; mechanism; ice; nucleation; size

EPSRC: Kathleen Thompson: EP/S023593/1Atmospheric ice formation can alter cloud properties, impacting precipitation and cloud lifetimes. Understanding the microphysical processes which control ice formation in clouds is vital for reducing climate uncertainties. For example, ice nucleating particles (INPs) induce the freezing of water droplets in clouds, therefore, understanding the nature and abundance of these particles in the atmosphere is important for improving our understanding of the aerosol-cloud radiative effects on climate. The proposed research aims to fill the vital research gap of understanding the mechanism by which macromolecules nucleate ice in clouds. I aim to do this by taking samples collected in the UK, with known ice nucleating ability, to the University of British Columbia to investigate their surfactant properties. I will use a tensiometer to measure their surface tension, interpret the surfactant concentration of the biological INP and correlate ice nucleating ability with surfactant concentrations. This project is innovative as it uses real ambient samples and unique instrumentation for the field of atmospheric ice nucleation. The outcome of this will help us to better understand the nature of biological INP in the atmosphere and use their potential surface tension properties to predict ice formation in clouds as a result of changes in concentrations of organic aerosol.

EPSRC：凯瑟琳·汤普森（Kathleen Thompson）：EP/S023593/1atmospheric冰的形成可以改变云特性，从而影响降水和云寿命。了解控制云中冰形成的微物理过程对于减少气候不确定性至关重要。例如，冰核颗粒（INP）诱导云中的水滴冻结，因此，了解大气中这些颗粒的性质和丰度对于提高我们对我们对气雾云辐射对气候的辐射影响的理解至关重要。拟议的研究旨在填补理解大分子在云中成核冰的机制的重要研究差距。我的目标是通过将在英国采集的样品（具有已知的冰核能力）带到不列颠哥伦比亚大学研究其表面活性剂特性。我将使用张力仪测量其表面张力，解释生物INP的表面活性剂浓度，并将冰核能力与表面活性剂浓度相关联。该项目具有创新性，因为它使用真实的环境样品和独特的仪器来用于大气冰核的领域。结果的结果将有助于我们更好地理解大气中生物INP的性质，并利用其潜在的表面张力特性来预测有机气溶胶浓度的变化，从而预测云中的冰形成。