气候变化领域集成服务门户(CCPortal): Mapping gaseous dimethylamine, trimethylamine, ammonia, and their particulate counterparts in marine atmospheres of China's marginal seas - Part 2: Spatiotemporal heterogeneity, causes, and hypothesis

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DOI	10.5194/acp-22-1515-2022
	Mapping gaseous dimethylamine, trimethylamine, ammonia, and their particulate counterparts in marine atmospheres of China's marginal seas - Part 2: Spatiotemporal heterogeneity, causes, and hypothesis
	Gao, Yating; Chen, Dihui; Shen, Yanjie; Gao, Yang; Gao, Huiwang; Yao, Xiaohong
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	1515
结束页码	1528
卷号	22 期号:2 页码:14
英文摘要	Spatiotemporal heterogeneities in the concentrations of alkaline gases and their particulate counterparts in the marine atmosphere over China's marginal seas were investigated in terms of causes and chemical conversion during two winter cruise campaigns, using semi-continuous measurements made by an onboard URG-9000D Ambient Ion Monitor-Ion Chromatograph (AIM-IC, Thermo Fisher). During the cruise campaign over the East China Sea from 27 December 2019 to 6 January 2020, the concentrations of gas-phase atmospheric trimethylamine (TMA(gas)) varied by approximately 1 order of magnitude, with an average (+/- standard deviation) of 0.10 +/- 0.04 mu g m(-3) corresponding to a mixing ratio of 26 +/- 17 pptv. Corresponding mean values were 0.037 +/- 0.011 mu g m(-3) (14 +/- 5 pptv in mixing ratio) over the Yellow Sea during the period from 7 to 16 January 2020 and 0.031 +/- 0.009 mu g m(-3) (12 +/- 4 pptv in mixing ratio) over the Yellow Sea and Bohai Sea from 9 to 22 December 2019. By contrast, the simultaneously observed concentrations of TMA in PM2.5, detected as TMAH(+), over the East China Sea were 0.098 +/- 0.069 mu g m(-3) and substantially smaller than the 0.28 +/- 0.18 mu g m(-3) observed over the Yellow Sea and Bohai Sea from 9 to 22 December 2019. A significant correlation between TMA(gas) and particulate TMAH(+) was observed over the East China Sea, but no correlation was found over the Yellow Sea and Bohai Sea. Proportional or disproportional variations in concentrations of TMA(gas) with particulate TMAH(+) over the sea zones were probably attributed to the difference in the enrichment of TMAH(+) in the sea surface microlayer. In addition, spatiotemporal heterogeneities in concentrations of atmospheric ammonia (NH3gas), atmospheric dimethylamine (DMA(gas)), and DMA in PM2.5, detected as DMAH(+), were investigated. Case analyses were performed to illustrate the formation and chemical conversion of particulate aminium ions in marine aerosols. Finally, we hypothesized the release of basic gases and particulate counterparts from the ocean to the atmosphere, together with the secondary formation of DMAH(+) and chemical conversion of TMAH(+), in the marine atmosphere.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000751425100001
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/273126
作者单位	Ocean University of China; Ocean University of China; Laoshan Laboratory
推荐引用方式 GB/T 7714	Gao, Yating,Chen, Dihui,Shen, Yanjie,et al. Mapping gaseous dimethylamine, trimethylamine, ammonia, and their particulate counterparts in marine atmospheres of China's marginal seas - Part 2: Spatiotemporal heterogeneity, causes, and hypothesis[J],2022,22(2):14.
APA	Gao, Yating,Chen, Dihui,Shen, Yanjie,Gao, Yang,Gao, Huiwang,&Yao, Xiaohong.(2022).Mapping gaseous dimethylamine, trimethylamine, ammonia, and their particulate counterparts in marine atmospheres of China's marginal seas - Part 2: Spatiotemporal heterogeneity, causes, and hypothesis.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(2),14.
MLA	Gao, Yating,et al."Mapping gaseous dimethylamine, trimethylamine, ammonia, and their particulate counterparts in marine atmospheres of China's marginal seas - Part 2: Spatiotemporal heterogeneity, causes, and hypothesis".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.2(2022):14.