Collaborative Research: Ammonia Phase PARtitioning and Transport (APART)

合作研究：氨相分配和传输 (APART)

• 批准号: 2020127
• 负责人: Emily Fischer
• 金额: $ 77.49万
• 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: 2020
• 资助国家: 美国
• 起止时间: 2020-07-15 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2020127&HistoricalAwards=false
• 关键词: Collaborative; Research; Ammonia; Phase; PARtitioning

Atmospheric emissions of ammonia (NH3) contribute to the formation of fine particles and nitrogen deposition that affect human and ecological health, yet little is known about NH3 transformation and fate. In this project, the research team intends to perform airborne and ground-based measurements of NH3 emitted from major cattle and dairy feedlots in the foothills of the Rocky Mountain National Park (RMNP). Results will help inform atmospheric chemists and test a forecasting tool for the downwind transport of reduced nitrogen into a sensitive ecosystem. In this collaborative project between 2 institutions and 4 PIs, a 10-week field campaign is planned in the foothills of RMNP to determine (i) fluxes and deposition timescales of NH3 within 10 km downwind of large sources, and (ii) spatial distribution and partitioning of NHx ~100 km downwind of same sources. The main sampling platform is the University of Wyoming King Air (UWKA) research aircraft equipped with new measurement capabilities that allow for enhanced sampling strategies of gases and particulates. Gaseous species include reduced and oxidized nitrogen (NH3 and HNO3), methane (CH4), ethane (C2H6), carbon monoxide (CO), carbon dioxide (CO2) and water vapor (H2O), while particulates include aerosol concentration and size and their water-soluble species concentrations. CH4 and C2H6 allow to track the plume and distinguish between different source types. Integration of flight data with ground-based observations collected from mobile monitoring and existing sampling sites, provides a means to better interpret consistently available ground-based data in the future. Results will also contribute to improved representation of NH3 in transport models, help predict local air quality and inform stakeholders. Two graduate and several undergraduate students will obtain valuable hands-on experiences in a collaborative field campaign.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.

大气中氨 (NH3) 的排放会导致细颗粒的形成和氮沉积，影响人类和生态健康，但人们对 NH3 的转化和归宿知之甚少。在该项目中，研究团队打算对落基山国家公园 (RMNP) 山麓主要牛和奶牛饲养场排放的 NH3 进行空中和地面测量。结果将有助于为大气化学家提供信息，并测试减少的氮顺风输送到敏感生态系统的预测工具。在这个 2 个机构和 4 个 PI 之间的合作项目中，计划在 RMNP 山麓进行为期 10 周的实地考察，以确定 (i) 大型源顺风 10 公里内 NH3 的通量和沉积时间尺度，以及 (ii) 空间分布和相同来源顺风约 100 公里处的 NHx 分区。主要采样平台是怀俄明大学 King Air (UWKA) 研究飞机，配备了新的测量功能，可增强气体和颗粒物的采样策略。气态物质包括还原氮和氧化氮（NH3 和 HNO3）、甲烷（CH4）、乙烷（C2H6）、一氧化碳（CO）、二氧化碳（CO2）和水蒸气（H2O），而颗粒物包括气溶胶浓度和大小及其水溶性物质浓度。 CH4 和 C2H6 允许跟踪羽流并区分不同的来源类型。将飞行数据与从移动监测和现有采样点收集的地面观测数据相结合，提供了一种更好地解释未来一致可用的地面数据的方法。研究结果还将有助于改善 NH3 在运输模型中的代表性，帮助预测当地空气质量并为利益相关者提供信息。两名研究生和几名本科生将在合作领域活动中获得宝贵的实践经验。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Enhancements in Ammonia and Methane from Agricultural Sources in the Northeastern Colorado Front Range Using Observations from a Small Research Aircraft

利用小型研究飞机的观测增强科罗拉多州东北部前沿山脉农业来源的氨和甲烷

• DOI: 10.1021/acs.est.1c07382
• 发表时间: 2022-02
• 期刊: Environmental Science & Technology
• 影响因子: 11.4
• 作者: Pollack, Ilana B.;McCabe, Megan E.;Caulton, Dana R.;Fischer, Emily V.
• 通讯作者: Fischer, Emily V.