气候变化领域集成服务门户(CCPortal): Dimethyl sulfide and its role in aerosol formation and growth in the Arctic summer

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DOI	10.5194/acp-19-14455-2019
	Dimethyl sulfide and its role in aerosol formation and growth in the Arctic summer - A modelling study
	Ghahremaninezhad R.; Gong W.; Galí M.; Norman A.-L.; Beagley S.R.; Akingunola A.; Zheng Q.; Lupu A.; Lizotte M.; Levasseur M.; Richard Leaitch W.
发表日期	2019
ISSN	16807316
起始页码	14455
结束页码	14476
卷号	19 期号:23
英文摘要	Atmospheric dimethyl sulfide, DMS(g), is a climatically important sulfur compound and is the main source of biogenic sulfate aerosol in the Arctic atmosphere. DMS(g) production and emission to the atmosphere increase during the summer due to the greater ice-free sea surface and higher biological activity. We implemented DMS(g) in the Environment and Climate Change Canada's (ECCC) online air quality forecast model, GEM-MACH (Global Environmental Multiscale-Modelling Air quality and CHemistry), and compared model simulations with DMS(g) measurements made in Baffin Bay and the Canadian Arctic Archipelago in July and August 2014. Two seawater DMS(aq) datasets were used as input for the simulations: (1) a DMS(aq) climatology dataset based on seawater concentration measurements (Lana et al., 2011) and (2) a DMS(aq) dataset based on satellite detection (Galí et al., 2018). In general, GEM-MACH simulations under-predict DMS(g) measurements, which is likely due to the negative biases in both DMS(aq) datasets. However, a higher correlation and smaller bias were obtained with the satellite dataset. Agreement with the observations improved when climatological values were replaced by DMS(aq) in situ values that were measured concurrently with atmospheric observations over Baffin Bay and the Lancaster Sound area in July 2014. The addition of DMS(g) to the GEM-MACH model resulted in a significant increase in atmospheric SO2 for some regions of the Canadian Arctic (up to 100%). Analysis of the size-segregated sulfate aerosol in the model shows that a significant increase in sulfate mass occurs for particles with a diameter smaller than 200nm due to the formation and growth of biogenic aerosol at high latitudes (>70°N). The enhancement in sulfate particles is most significant in the size range from 50 to 100nm; however, this enhancement is stronger in the 200-1000nm size range at lower latitudes (<70°N). These results emphasize the important role of DMS(g) in the formation and growth of fine and ultrafine sulfate-containing particles in the Arctic during the summertime. © 2019 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	aerosol formation; arctic environment; concentration (composition); data set; dimethylsulfide; in situ measurement; summer; Arctic Ocean; Baffin Bay [Arctic Ocean]; Canada; Canadian Arctic; Lana
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144008
作者单位	Environment and Climate Change Canada, Toronto, ON, Canada; Québec-Océan, Department of Biology, Université LavalQC, Canada; Department of Physics and Astronomy, University of Calgary, Calgary, Canada
推荐引用方式 GB/T 7714	Ghahremaninezhad R.,Gong W.,Galí M.,et al. Dimethyl sulfide and its role in aerosol formation and growth in the Arctic summer - A modelling study[J],2019,19(23).
APA	Ghahremaninezhad R..,Gong W..,Galí M..,Norman A.-L..,Beagley S.R..,...&Richard Leaitch W..(2019).Dimethyl sulfide and its role in aerosol formation and growth in the Arctic summer - A modelling study.Atmospheric Chemistry and Physics,19(23).
MLA	Ghahremaninezhad R.,et al."Dimethyl sulfide and its role in aerosol formation and growth in the Arctic summer - A modelling study".Atmospheric Chemistry and Physics 19.23(2019).