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Collaborative Research: Effects of Ammonia on the Chemical and Physical Properties of Atmospheric Secondary Organic Aerosol

合作研究：氨对大气二次有机气溶胶化学和物理性质的影响

基本信息

批准号：
1719245
负责人：
Ann Marie Carlton
金额：
$ 29.82万
依托单位：
University of California-Irvine
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-07-15 至 2021-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1719245&HistoricalAwards=false
关键词：
Collaborative Research Effects Ammonia Chemical

项目摘要

This project will investigate the effects of ammonia on the chemical and physical properties of small particles in the atmosphere. It will also look at the effects of ammonia on brown carbon in the atmosphere. The approach will combine ambient measurements, 3-D chemical transport modeling, and the analysis of past field campaign data. This work will provide important insight into the sources and formation processes of secondary organic aerosol, critical for a better understanding of both air quality and climate.The objectives of the proposal are to: (1) Characterize the effects of NH3 on the concentration and reversible/irreversible nature of aqueous SOA (aqSOA); (2) Characterize the effect of NH3 on atmospheric BrC formation; and (3) Determine the spatial and temporal scales of the NH3 impacts on aqSOA and BrC formation. The two processes that will be evaluated include aqueous reactions that are either catalyzed by or directly involve NH4 and represent a significant source of highly oxidized, lower-volatility SOA, and the reaction of NH4 with organic compounds and the production of SOA that may be light-absorbing.Ambient measurements will be made at an urban site in the eastern U.S. that is heavily influenced by biogenic VOC emissions, mobile sources, and regional NH3 emissions from agriculture. Modeling studies, using WRF-CMAQ, will provide an analysis of temporal and spatial variability in the NH3 effects on SOA and BrC formation and the impacts on air quality and climate.

该项目将研究氨对大气中小颗粒的化学和物理性质的影响。它还将研究氨对大气中棕色碳的影响。该方法将结合环境测量、3-D化学传输模型和对过去野外活动数据的分析。这项工作将对二次有机气溶胶的来源和形成过程提供重要的见解，对更好地了解空气质量和气候至关重要。该提案的目标是：(1)表征NH3对水溶液SOA （aqSOA）浓度和可逆/不可逆性质的影响；(2)表征NH3对大气BrC形成的影响；(3)确定NH3对aqSOA和BrC形成影响的时空尺度。将被评估的两个过程包括由NH4催化或直接涉及的水反应，这些反应代表了高氧化、低挥发性SOA的重要来源，以及NH4与有机化合物的反应，并产生可能吸收光的SOA。环境测量将在美国东部的一个城市站点进行，该站点受到生物挥发性有机化合物排放、移动源和区域农业NH3排放的严重影响。利用WRF-CMAQ进行建模研究，将分析NH3对SOA和BrC形成的影响以及对空气质量和气候的影响的时空变异。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

On Aerosol Liquid Water and Sulfate Associations: The Potential for Fine Particulate Matter Biases

DOI：
10.3390/atmos11020194
发表时间：
2020-02-01
期刊：
ATMOSPHERE
影响因子：
2.9
作者：
Babila, Jonathon E.;Carlton, Annmarie G.;Ghate, Virendra P.
通讯作者：
Ghate, Virendra P.

Changing Nature of Organic Carbon over the United States

DOI：
10.1021/acs.est.0c02225
发表时间：
2020-09-01
期刊：
ENVIRONMENTAL SCIENCE & TECHNOLOGY
影响因子：
11.4
作者：
Christiansen, Amy E.;Carlton, Annmarie G.;Porter, William C.
通讯作者：
Porter, William C.

Investigating the evolution of water-soluble organic carbon in evaporating cloud water

DOI：
10.1039/d0ea00005a
发表时间：
2021-01
期刊：
Environmental Science: Atmospheres
影响因子：
0
作者：
V. Pratap;A. Christiansen;A. Carlton;S. Lance;P. Casson;Jed Dukett;Hesham Hassan;J. Schwab;C. Hennigan
通讯作者：
V. Pratap;A. Christiansen;A. Carlton;S. Lance;P. Casson;Jed Dukett;Hesham Hassan;J. Schwab;C. Hennigan