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实地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，用于模拟野火羽流中污染物老化过程的可变性。最近的观测表明，烟柱上的梯度包括光化学、气溶胶成分和气溶胶大小的差异，这可能是由于烟羽不同部分的稀释和紫外线辐射的差异所致。通过研究羽流边缘/核心和顶部/底部之间的差异，研究人员希望能更好地了解不同羽流之间老化的差异。大气模拟系统(SAM)-气溶胶模拟程序(ASP)模型由皮尔斯和阿尔瓦拉多开发，之前得到了美国国家科学基金会的支持，将用于促进对与污染和气候相关的烟雾老化过程的理解。将用于该项目的数据包括：(1)美国国家科学基金会资助的西部云化学、气溶胶吸收和氮气野火实验(WE-CAN)活动于2018年7月至9月举行；(2)美国能源部支持的生物质燃烧观测项目(BBOP)于2013年6月至10月进行；以及(3)火灾对区域到全球环境和空气质量的影响(FIREX-AQ)运动，这是NASA和NOAA于2019年夏天联合发起的。该奖项反映了NSF的法定使命，通过使用基金会的智力优势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.