AGS-PRF: Sensitivity Analysis of Carbonaceous Aerosol Mixing State and Morphology on Spectral Optical Properties

被称为气溶胶的大气小颗粒可以通过与云和辐射的相互作用来影响天气和气候。在这个项目中，将进行研究，以确定气溶胶的大小、形状和组成如何影响气溶胶与辐射的相互作用。该项目将重点关注从森林大火和汽车尾气等各种燃烧来源排放的黑碳。该项目的主要成果将是对辐射特性对气溶胶形态和成分的敏感性进行定量估计，这将有助于改进气候模型模拟。这位博士后研究人员还计划开展各种教育和推广活动，如教授大学课程、指导本科生，以及为高中生提供研究机会。研究人员计划开展一个项目，系统地了解碳质气溶胶的光谱光学性质对气溶胶形态、折射率和外部混合变化的敏感性并将其参数化。这种方法本质上是计算性的，包括使用最先进的气溶胶模拟技术和非球形粒子-电磁辐射相互作用程序。提出了四个主要的研究问题：1)黑碳气溶胶的物理性质是如何随有机碳涂层的变化而演变的？2)裸黑碳形态和与有机碳外部混合的黑碳气溶胶的密集光学性质和广泛的光学性质有何不同？3)裸黑碳和外混合黑碳的光谱响应是什么？4)对于气候模型中常规使用的球形核壳计算，对于考虑和不考虑有机碳混合的非球形黑碳颗粒，需要进行哪些修正？

Small atmospheric particles, known as aerosols, can impact weather and climate through their interaction with clouds and radiation. In this project, research will take place to determine how aerosol size, shape, and composition impacts the interaction of aerosols with radiation. This project will focus on black carbon, which is emitted from various combustion sources such as forest fires and vehicle exhaust. The main result of the project would be a quantitative estimation of the sensitivity of radiative properties to aerosol morphology and composition, which will help to improve climate model simulations. The postdoctoral researcher also plans to conduct various education and outreach activities, such as teaching a college course, mentoring undergraduate students, and providing research opportunities to high school students.The researcher plans to conduct a project to systematically understand and parameterize the sensitivity of the spectral optical properties of carbonaceous aerosols to variations in aerosol morphology, refractive index, and external mixing. The approach will be computational in nature involving the use of state-of-the-art aerosol simulation techniques and non-spherical particle-electromagnetic radiation interaction codes. Four main research questions are posed: 1) How do the physical properties of black carbon aerosol evolve as a function of organic carbon coating? 2) How do the intensive optical properties and extensive optical properties differ for bare black carbon morphology and those with external mixing with organic carbon? 3) What is the spectral response of bare and externally-mixed black carbon? 4) What corrections are needed to spherical core-shell calculations, conventionally used in climate models, with regard to incorporating non-spherical black carbon particles with and without organic carbon mixing?