Towards an Improved Understanding of Winter Air Pollution

加深对冬季空气污染的了解

• 批准号: 1901786
• 负责人: Lyatt Jaegle
• 金额: $ 56.91万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1901786&HistoricalAwards=false
• 关键词: Towards; Improved; Understanding; Winter; Air

This research is directed toward gaining a better understanding of wintertime air pollution in the United States. Chemical modeling will be used to analyze data from a recent field study, the NSF-funded Wintertime INvestigation of Transport, Emissions, and Reactivity (WINTER) campaign conducted during February and March of 2015. The results of this research will be relevant for policy decisions regarding improvements in air quality.The three research objectives of this project are to: (1) improve the constraints on wintertime pollutant emissions; (2) elucidate the origin of oxidants during winter; and (3) examine the seasonal response of particulate matter less than 2.5 microns in diameter (PM2.5) and ozone concentrations to past and future changes in emissions. The GEOS-Chem chemical transport model will be used to interpret the observations from the WINTER field campaign. Because emissions of ammonia (NH3) from livestock operations and fertilized fields are highly uncertain, this project includes an examination of the ability of different NH3 emissions inventories in the model to capture the observed winter concentrations of ammonium (NH4+) and NH4+ wet deposition fluxes over the US. Primary and secondary organic aerosol precursor emissions will be constrained in order to improve the representation of organic aerosol in the model. Wintertime ground-based and aircraft observations of HCHO and ClNO2 will be used to investigate their sources during winter. Finally, the model will be used together with surface observations to further understand the seasonal sensitivity of surface PM2.5 composition to emission changes over the entire US. This project will support a postdoctoral scholar and a graduate student.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.

这项研究旨在更好地了解美国冬季的空气污染。 化学建模将用于分析最近的实地研究数据，即2015年2月和3月期间进行的NSF资助的运输，排放和反应性（WINTER）冬季调查活动。本研究的三个目标是：（1）改善冬季污染物排放的限制;（2）阐明冬季氧化剂的来源;（3）研究冬季空气污染物的来源。以及（3）检查直径小于2.5微米的颗粒物的季节性响应（PM2.5）和臭氧浓度与过去和未来排放量变化的关系。将使用全球测地系统化学迁移模型解释冬季实地活动的观测结果。 由于氨（NH3）从畜牧业和施肥领域的排放量是高度不确定的，该项目包括检查不同的NH3排放清单的能力，在模型中捕捉到的冬季浓度的铵（NH 4+）和NH 4+湿沉降通量在美国。 一次和二次有机气溶胶前体排放将受到限制，以提高有机气溶胶在模式中的代表性。 冬季地面和飞机观测HCHO和ClNO 2将用于调查冬季的来源。最后，该模型将与地面观测一起使用，以进一步了解整个美国地面PM2.5成分对排放变化的季节敏感性。 该项目将支持一名博士后学者和一名研究生。该奖项反映了NSF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。

项目成果

Significant Decrease in Wet Deposition of Anthropogenic Chloride Across the Eastern United States, 1998–2018

1998 年至 2018 年美国东部人为氯化物湿沉积显着减少

• DOI: 10.1029/2020gl090195
• 发表时间: 2020
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Haskins, Jessica D.;Jaeglé, Lyatt;Thornton, Joel A.
• 通讯作者: Thornton, Joel A.

The Role of Midlatitude Cyclones in the Emission, Transport, Production, and Removal of Aerosols in the Northern Hemisphere

• DOI: 10.1029/2022jd038131
• 发表时间: 2023-03
• 期刊: Journal of Geophysical Research: Atmospheres
• 作者: Joseph Robinson;L. Jaeglé;L. Oman

Anthropogenic Control Over Wintertime Oxidation of Atmospheric Pollutants

• DOI: 10.1029/2019gl085498
• 发表时间: 2019-12-20
• 期刊: GEOPHYSICAL RESEARCH LETTERS
• 影响因子: 5.2
• 作者: Haskins, J. D.;Lopez-Hilfiker, F. D.;Thornton, J. A.
• 通讯作者: Thornton, J. A.

Heterogeneous Nitrate Production Mechanisms in Intense Haze Events in the North China Plain

• DOI: 10.1029/2021jd034688
• 发表时间: 2021-05-16
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
• 影响因子: 4.4
• 作者: Chan, Yuk-Chun;Evans, Mathew J.;Alexander, Becky
• 通讯作者: Alexander, Becky

Wintertime Formaldehyde: Airborne Observations and Source Apportionment Over the Eastern United States

• DOI: 10.1029/2020jd033518
• 发表时间: 2021-01
• 期刊: Journal of Geophysical Research: Atmospheres
• 作者: Jaime R. Green;M. Fiddler;D. Fibiger;E. McDuffie;J. Aquino;T. Campos;Viral Shah;L. Jaeglé;J. Thornton;J. Digangi;G. Wolfe;S. Bililign;S. Brown