Collaborative Research: Sizing Up the Smoke--Evaluating and Improving Our Ability to Predict Aged Wildfire Aerosol Size Distributions

合作研究：测量烟雾——评估和提高我们预测老化野火气溶胶尺寸分布的能力

• 批准号: 1559607
• 负责人: Jeffrey Pierce
• 金额: $ 37.21万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-04-01 至 2020-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1559607&HistoricalAwards=false
• 关键词: Collaborative; Research; Sizing; Up; Smoke

This research is focused on studying the aging of emissions from biomass burning. Small particles emitted from biomass combustion can react in the atmosphere, changing their size, number, and composition. These aging processes will be modeled and the model results will be tested against actual data from field campaigns.The following questions will be investigated: (1) What are the chemical processes that, when combined with the dispersion and coagulation of biomass-burning emissions, capture the evolution of aerosol size and number concentrations seen in the laboratory and the field? (2) Are the secondary organic aerosol (SOA) formation rates and size-distribution changes measured in lab experiments consistent with the field measurements of aerosol aging? If they are not, can we determine why (e.g. lack of continuous dilution or wall losses in chamber experiments)? (3) What properties most strongly determine the aged biomass-burning aerosol size and number? E.g. total mass emission flux, fresh particle size, fuel type, modified combustion efficiency, wind speed, fire area, vertical mixing depth, sunlight. (4) Can the variability in aged biomass-burning aerosol size and number be captured by a simple parameterization that is a function of the most important of the above properties?

这项研究的重点是研究生物质燃烧的排放衰老。从生物质燃烧发出的小颗粒可以在大气中反应，改变它们的大小，数量和组成。这些老化过程将进行建模，并将根据现场活动的实际数据进行测试。将研究以下问题：（1）当与生物量燃烧排放的分散和凝结相结合时，这些化学过程是什么，捕获了在实验室和现场中看到的气溶胶大小和数量浓度的演变？ （2）在实验实验中测得的二次有机气溶胶（SOA）形成率和尺寸分布变化是否与气溶胶老化的现场测量一致？如果不是，我们可以确定为什么（例如，在室内实验中缺乏连续稀释或壁损失）？ （3）哪些特性最有力地决定了老化的生物质燃烧气溶胶的大小和数量？例如。总质量排放通量，新鲜粒径，燃料类型，改良的燃烧效率，风速，火区，垂直混合深度，阳光。 （4）可以通过简单的参数化来捕获老年生物质燃烧气溶胶的大小和数字的变异性，该参数化是上述最重要的函数的函数吗？