Collaborative Research: Understanding the chemical and physical variability of smoke using plume spatial gradients: analysis and parameterization for air quality and climate models

该项目包括对最近三次大气化学野外活动的观测数据进行评估，以测量野火羽流中的污染物。观测数据将用于开发和评估一种新的参数化方法，用于模拟野火羽流中污染物老化过程的变异性。新的参数化有望提高空气质量和气候模式的预测能力。最近的观测表明，烟羽的梯度包括光化学、气溶胶成分和气溶胶大小的差异，这可能是由烟羽不同部分稀释度和紫外线辐射的差异造成的。通过研究羽流边缘/核心和顶部/底部之间的差异，研究人员希望更好地了解不同羽流之间的老化变异性。大气模拟系统(SAM) -气溶胶模拟程序（ASP）模型由Pierce和Alvarado在NSF的事先支持下开发，将用于促进对污染和气候相关烟雾老化过程的理解。本项目将使用的数据包括：(1)2018年7月至9月举行的美国国家科学基金会资助的西部野火云化学、气溶胶吸收和氮实验（WE-CAN）活动；(2) 2013年6 - 10月美国能源部支持的生物质燃烧观测项目（BBOP）；(3)火灾对区域到全球环境和空气质量的影响（Fire - aq）活动，这是NASA/NOAA于2019年夏季开展的一项联合项目。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This project includes an evaluation of observational data from three recent atmospheric chemistry field campaigns to measure pollutants in the plumes of wildfires. The observational data will used to develop and assess a new parameterization for modeling the variability in the pollutant aging processes across wildfire plumes. The new parameterization is expected to improve the predictive capability of air quality and climate models.Recent observations suggest that gradients across a smoke plume include differences in photochemistry, aerosol composition, and aerosol size, likely driven by differences in dilution and UV radiation in different parts of the plume. By studying the differences between the plume edge/core and top/bottom, the investigators expect to provide a better understanding of the variability in aging between different plumes. The System for Atmospheric Modelling (SAM) - Aerosol Simulation Program (ASP) model, developed by Pierce and Alvarado with prior support from NSF, will be used to advance the understanding of pollution- and climate-relevant smoke aging processes. The data that will be used for this project includes: (1) the NSF-funded Western wildfire Experiment for Cloud chemistry, Aerosol absorption, and Nitrogen (WE-CAN) campaign held in July-September 2018; (2) the DOE-supported Biomass Burning Observation Project (BBOP) conducted during June-October 2013; and (3) the Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) campaign, a joint NASA/NOAA venture, that occurred in the summer of 2019.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.