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| DOI | 10.1016/j.atmosenv.2020.117961 |
| Impact of dimethylsulfide chemistry on air quality over the Northern Hemisphere | |
| Zhao J.; Sarwar G.; Gantt B.; Foley K.; Henderson B.H.; Pye H.O.T.; Fahey K.M.; Kang D.; Mathur R.; Zhang Y.; Li Q.; Saiz-Lopez A. | |
| 发表日期 | 2021 |
| ISSN | 1352-2310 |
| 卷号 | 244 |
| 英文摘要 | We implement oceanic dimethylsulfide (DMS) emissions and its atmospheric chemical reactions into the Community Multiscale Air Quality (CMAQv53) model and perform annual simulations without and with DMS chemistry to quantify its impact on tropospheric composition and air quality over the Northern Hemisphere. DMS chemistry enhances both sulfur dioxide (SO2) and sulfate (SO42−) over seawater and coastal areas. It enhances annual mean surface SO2 concentration by +46 pptv and SO42−by +0.33 μg/m3 and decreases aerosol nitrate concentration by −0.07 μg/m3 over seawater compared to the simulation without DMS chemistry. The changes decrease with altitude and are limited to the lower atmosphere. Impacts of DMS chemistry on SO42− are largest in the summer and lowest in the fall due to the seasonality of DMS emissions, atmospheric photochemistry and resultant oxidant levels. Hydroxyl and nitrate radical-initiated pathways oxidize 75% of the DMS while halogen-initiated pathways oxidize 25%. DMS chemistry leads to more acidic particles over seawater by decreasing aerosol pH. Increased SO42−from DMS enhances atmospheric extinction while lower aerosol nitrate reduces the extinction so that the net effect of DMS chemistry on visibility tends to remain unchanged over most of the seawater. © 2020 |
| 关键词 | DimethylsulfideEmissionsSeawaterSulfateSulfur dioxide |
| 语种 | 英语 |
| scopus关键词 | Aerosols; Air quality; Chemical reactions; Nitrates; Seawater effects; Sulfur dioxide; Aerosol nitrates; Atmospheric chemical reaction; Atmospheric extinction; Atmospheric photochemistry; Community multi-scale air qualities; Lower atmosphere; Northern Hemispheres; Tropospheric composition; Atmospheric chemistry; dimethyl sulfide; nitrate; oxidizing agent; sea water; sulfate; sulfur dioxide; air quality; atmospheric chemistry; concentration (composition); dimethylsulfide; Northern Hemisphere; photochemistry; seasonal variation; seawater; sulfur dioxide; troposphere; aerosol; air quality; Article; autumn; chemical reaction; chemistry; Northern Hemisphere; pH; priority journal; seashore; simulation; summer; troposphere |
| 来源期刊 | ATMOSPHERIC ENVIRONMENT
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/248815 |
| 作者单位 | Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China; Center for Environmental Measurement and Modeling, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle ParkNC 27711, United States; Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle ParkNC 27711, United States; Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, 28006, Spain |
| 推荐引用方式 GB/T 7714 | Zhao J.,Sarwar G.,Gantt B.,et al. Impact of dimethylsulfide chemistry on air quality over the Northern Hemisphere[J],2021,244. |
| APA | Zhao J..,Sarwar G..,Gantt B..,Foley K..,Henderson B.H..,...&Saiz-Lopez A..(2021).Impact of dimethylsulfide chemistry on air quality over the Northern Hemisphere.ATMOSPHERIC ENVIRONMENT,244. |
| MLA | Zhao J.,et al."Impact of dimethylsulfide chemistry on air quality over the Northern Hemisphere".ATMOSPHERIC ENVIRONMENT 244(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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