AGS-PRF: Novel Detection of Accelerated Emissions of Nitrogen Oxides Following High Latitude Peat Fires

AGS-PRF：高纬度泥炭火灾后氮氧化物加速排放的新检测

• 批准号: 2318739
• 负责人: Alan Gorchov Negron
• 金额: $ 20.2万
• 依托单位: Gorchov Negron, Alan
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2318739&HistoricalAwards=false
• 关键词: AGS; PRF; Novel; Detection; Accelerated

In this Postdoctoral Research Fellowship project, the PI will use remote sensing observations along with laboratory and field measurements to determine if peatland fires, and the associated nitrogen emissions, might fertilize nearby high-latitude soils resulting in an enhancement of microbial production of nitrogen oxides. These northern high-latitude soils are the largest reservoir of soil organic matter on the planet, and ongoing disruptions due to wildfire and other climatic changes could result in a substantial release of greenhouse gases and reactive gases such as nitrogen oxides, which are the focus of this work. The new knowledge gained during this project could enhance our understanding of an understudied and potentially substantial source of soil nitrogen emissions, which will be beneficial to atmospheric chemistry and climate research communities, as well as the broader public.The specific tasks include: (1) using satellite remote sensing data to document trends and emissions of nitrogen dioxide and carbon monoxide from high-latitude fires and soils; (2) conduct laboratory soil chamber experiments to quantify in-situ emissions from burning peatland soils; (3) deploy a network of nitrogen oxides analyzers to compare ambient nitrogen oxides concentrations nearby both burned and pristine soils; (4) combine these data with forward modeling in order to compare to satellite columns; and (5) conduct additional laboratory experiments to determine physical and chemical controls of soil nitrogen oxides. The end result will provide emission factors of nitrogen oxides from fires and soils in high-latitude land masses and will provide information that might explain the nitrogen oxides anomaly observed after peatland fires. The PI plans on joining and enhancing the Polar Science Early Career Community Office and mentoring an undergraduate student during the course of this project.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.

在这个博士后研究奖学金项目中，首席研究员将利用遥感观测以及实验室和现场测量来确定泥炭地火灾和相关的氮排放是否可能使附近高纬度土壤肥沃，从而增加微生物产生氮氧化物。这些北部高纬度土壤是地球上最大的土壤有机质库，野火和其他气候变化造成的持续破坏可能会导致温室气体和氮氧化物等反应性气体的大量释放，而这些是温室气体和氮氧化物等活性气体的重点。这项工作。在该项目中获得的新知识可以增强我们对尚未充分研究的潜在大量土壤氮排放源的理解，这将有利于大气化学和气候研究界以及更广泛的公众。具体任务包括：（1）利用卫星遥感数据记录高纬度火灾和土壤中二氧化氮和一氧化碳的趋势和排放量； (2) 进行实验室土壤室实验，以量化燃烧泥炭地土壤的原位排放； (3) 部署氮氧化物分析仪网络来比较烧毁土壤和原始土壤附近的环境氮氧化物浓度； (4) 将这些数据与正演模型相结合，以便与卫星柱进行比较； (5) 进行额外的实验室实验以确定土壤氮氧化物的物理和化学控制。最终结果将提供高纬度陆地火灾和土壤中氮氧化物的排放因子，并将提供可能解释泥炭地火灾后观察到的氮氧化物异常的信息。 PI 计划加入并加强极地科学早期职业社区办公室，并在该项目期间指导一名本科生。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查进行评估，被认为值得支持标准。