Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-13617-2018 |
DMS oxidation and sulfur aerosol formation in the marine troposphere: a focus on reactive halogen and multiphase chemistry | |
Chen, Qianjie1,4; Sherwen, Tomas2,3; Evans, Mathew2,3; Alexander, Becky1 | |
2018-09-27 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:18页码:13617-13637 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | The oxidation of dimethyl sulfide (DMS) in the troposphere and subsequent chemical conversion into sulfur dioxide (SO2) and methane sulfonic acid (MSA) are key processes for the formation and growth of sulfur-containing aerosol and cloud condensation nuclei (CCN), but are highly simplified in large-scale models of the atmosphere. In this study, we implement a series of gas-phase and multiphase sulfur oxidation mechanisms into the Goddard Earth Observing System-Chemistry (GEOS -Chem) global chemical transport model - including two important intermediates, dimethyl sulfoxide (DMSO) and methane sulphinic acid (MSIA) - to investigate the sulfur cycle in the global marine troposphere. We found that DMS is mainly oxidized in the gas phase by OH (66 %), NO3 (16%) and BrO (12 %) globally. DMS BrO is important for the model's ability to reproduce the observed seasonality of surface DMS mixing ratio in the Southern Hemisphere. MSA is mainly produced from multiphase oxidation of MSIA by OH(aq) (66 %) and O-3(aq) (30 %) in cloud droplets and aerosols. Aqueous-phase reaction with OH accounts for only 12 % of MSA removal globally, and a higher MSA removal rate is needed to reproduce observations of the MSA / nssSO(4)(2-)ratio. The modeled conversion yield of DMS into SO2 and MSA is 75 % and 15 %, respectively, compared to 91 % and 9 % in the standard model run that includes only gas-phase oxidation of DMS by OH and NO3. The remaining 10 % of DMS is lost via deposition of intermediates DMSO and MSIA. The largest uncertainties for modeling sulfur chemistry in the marine boundary layer (MBL) are unknown concentrations of reactive halogens (BrO and Cl) and OH(aq) concentrations in cloud droplets and aerosols. To reduce uncertainties in MBL sulfur chemistry, we should prioritize observations of reactive halogens and OH(aq). |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460485000001 |
WOS关键词 | SEA-SALT SULFATE ; GAS-PHASE REACTIONS ; METHANESULFONIC-ACID ; DIMETHYL SULFIDE ; ATMOSPHERIC CHEMISTRY ; GLOBAL-MODEL ; 3-DIMENSIONAL MODEL ; PHOTOCHEMICAL DATA ; BROMINE CHEMISTRY ; ATOMIC CHLORINE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17235 |
专题 | 地球科学 |
作者单位 | 1.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA; 2.Univ York, Dept Chem, Wolfson Atmospher Chem Labs, York, N Yorkshire, England; 3.Univ York, NCAS, York, N Yorkshire, England; 4.Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | Chen, Qianjie,Sherwen, Tomas,Evans, Mathew,et al. DMS oxidation and sulfur aerosol formation in the marine troposphere: a focus on reactive halogen and multiphase chemistry[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(18):13617-13637. |
APA | Chen, Qianjie,Sherwen, Tomas,Evans, Mathew,&Alexander, Becky.(2018).DMS oxidation and sulfur aerosol formation in the marine troposphere: a focus on reactive halogen and multiphase chemistry.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(18),13617-13637. |
MLA | Chen, Qianjie,et al."DMS oxidation and sulfur aerosol formation in the marine troposphere: a focus on reactive halogen and multiphase chemistry".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.18(2018):13617-13637. |
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