AGS-PRF: The Influence of Particle Phase Morphology on the Hygroscopic Behavior of Atmospheric Aerosols

该博士后研究奖学金（PRF）支持研究影响大气中小颗粒吸收水分的因素。可能重要的因素包括温度、相对湿度和颗粒相形态，例如颗粒是否可能是固体、半固体和/或液体的混合物，或者可能具有各种表面涂层。这些因素影响大气中粒子的生长和云的形成。因此，这项研究对于了解大气气溶胶如何影响气候非常重要。本研究解决的科学问题包括：(1)粒子相形态在云凝结核的激活和生长中起什么作用；(2)在自然大气中是否存在复杂粒子相行为的证据；(3)当前最先进的热力学和动力学模型如何很好地捕捉颗粒相和水蒸气吸收之间的复杂关系？实验室和现场测量将与热力学和动力学模型的数据相结合，以实现研究目标。这项研究的大部分将在加州理工学院的林德和罗宾逊实验室进行。

This Postdoctoral Research Fellowship (PRF) supports studies to investigate the factors that influence the uptake of water by small particles in the atmosphere. Factors that may be important include temperature, relative humidity, and particle phase morphologies, such as whether a particle may be a mixture of solids, semi-solids, and/or liquids, or may have various surface coatings. These factors influence particle growth and the formation of clouds in the atmosphere. Hence this research is important for understanding how atmospheric aerosols influence climate.The scientific questions that this research addresses include the following: (1) What role does particle phase morphology play in the activation and growth of cloud condensation nuclei; (2) Is there evidence of complex particle phase behavior in the natural atmosphere; and (3) How well do current state-of- the-art thermodynamic and kinetic models capture the complex relationship between particle phase and water vapor uptake? Laboratory and field measurements will be coupled with data from thermodynamic and kinetic models to accomplish the objectives of the research. Most of this research will take place in the Linde and Robinson Laboratory chamber facility at the California Institute of Technology.