Snowpack Chlorine Chemistry in Wintertime Urban Boundary Layer

冬季城市边界层积雪氯化学

• 批准号: 1738588
• 负责人: Kerri Pratt
• 金额: $ 49.59万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 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: 2017-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1738588&HistoricalAwards=false
• 关键词: Snowpack; Chlorine; Chemistry; Wintertime; Urban

This project focuses on investigating the effects of road (de-icing) salt application on urban air quality. The transfer of chlorine from road salts (NaCl) to the gas phase can alter the fate of atmospheric pollutants. Both field work and modeling will be conducted to investigate the production of nitryl chloride (ClNO2) from an urban snowpack. The three main hypotheses are: (1) ClNO2 is produced from road salt-laden snow by heterogeneous reaction of N2O5 with snow chloride; (2) N2O5 deposition to the urban snowpack, coincident with ClNO2 production, can be observed and quantified through near-surface vertical profile measurements; and (3) Snowpack ClNO2 production impacts urban winter daytime atmospheric oxidant conditions. This project supports the training of both graduate and undergraduate students. Outreach activities will be conducted through the UM Museum of Natural History Science Communication Fellows Program, part of the NSF Portal to the Public Network.

本项目的重点是调查道路(除冰)盐应用对城市空气质量的影响。氯从道路盐(氯化钠)转移到气相可以改变大气污染物的命运。将进行实地工作和建模，以调查从城市积雪中生产氯硝酸盐(ClNO2)的情况。三个主要假设是：(1)N2O5与氯化雪通过多相反应从道路上的盐分积雪中产生ClNO2；(2)N2O5沉积到城市积雪中，与ClNO2的产生一致，可以通过近地表垂直剖面测量来观察和量化；(3)积雪ClNO2的产生影响城市冬季白天的大气氧化条件。该项目支持研究生和本科生的培养。外展活动将通过密歇根大学自然历史博物馆科学交流研究员计划进行，该计划是美国国家科学基金会公共网络门户的一部分。

项目成果

Observation of Road Salt Aerosol Driving Inland Wintertime Atmospheric Chlorine Chemistry

• DOI: 10.1021/acscentsci.9b00994
• 发表时间: 2020-05-27
• 期刊: ACS CENTRAL SCIENCE
• 影响因子: 18.2
• 作者: McNamara, Stephen M.;Kolesar, Katheryn R.;Pratt, Kerri A.
• 通讯作者: Pratt, Kerri A.

Quantifying the Contributions of Aerosol- and Snow-Produced ClNO2 through Observations and 1D Modeling

• DOI: 10.1021/acsearthspacechem.3c00237
• 发表时间: 2023-12
• 期刊: ACS Earth and Space Chemistry
• 影响因子: 3.4
• 作者: Daun Jeong;S. M. McNamara;Qianjie Chen;J. Mirrielees;J. Edebeli;Kathryn D. Kulju;Siyuan Wang;Laila Hayani;R. Kirpes;N. Lata;S. China;Jose D. Fuentes;K. Pratt

Observation of N 2 O 5 Deposition and ClNO 2 Production on the Saline Snowpack

盐水积雪上 N 2 O 5 沉积和 ClNO 2 生成的观测

• DOI: 10.1021/acsearthspacechem.0c00317
• 发表时间: 2021
• 期刊: ACS Earth and Space Chemistry
• 影响因子: 3.4
• 作者: McNamara, Stephen M.;Chen, Qianjie;Edebeli, Jacinta;Kulju, Kathryn D.;Mumpfield, Jasmine;Fuentes, Jose D.;Bertman, Steven B.;Pratt, Kerri A.
• 通讯作者: Pratt, Kerri A.

HONO, Particulate Nitrite, and Snow Nitrite at a Midlatitude Urban Site during Wintertime

• DOI: 10.1021/acsearthspacechem.9b00023
• 发表时间: 2019-05-01
• 期刊: ACS EARTH AND SPACE CHEMISTRY
• 影响因子: 3.4
• 作者: Chen, Qianjie;Edebeli, Jacinta;Pratt, Kerri A.
• 通讯作者: Pratt, Kerri A.