气候变化领域集成服务门户(CCPortal): Variations in Ncn and Nccn over marginal seas in China related to marine traffic emissions; new particle formation and aerosol aging

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DOI	10.5194/acp-20-9665-2020
	Variations in Ncn and Nccn over marginal seas in China related to marine traffic emissions; new particle formation and aerosol aging
	Gao Y.; Zhang D.; Wang J.; Gao H.; Yao X.
发表日期	2020
ISSN	1680-7316
起始页码	9665
结束页码	9677
卷号	20 期号:16
英文摘要	In this study, a cruise campaign was conducted over marginal seas in China to measure the concentrations of condensation nuclei (Ncn), cloud condensation nuclei (Nccn) and other pollutants from day of year (DOY) 110 to DOY 135 of 2018. The ship self-emission signals were exhaustively excluded, and the mean values of Nccn during the cruise campaign were found to slightly increase from 3:21:1103 cm3 (meanstandard deviation) at supersaturation (SS) of 0.2% to 3:91:4103 cm3 at SS of 1.0 %, and the mean value for Ncn was 8:14:4103 cm3. Data analysis showed that marine traffic emissions apparently largely contributed to the increase in Ncn in the daytime, especially in the marine atmospheres over heavily traveled sea zones; however, the fresh sources made no clear contribution to the increase in Nccn. This finding was supported by the quantitative relations between Ncn and Nccn at SSD0.2 %-1.0% against the mixing ratios of SO2 in the ship self-emission plumes - i.e., a 1 ppb increase in SO2 corresponded to a 1:4104 cm3 increase in Ncn but only a 30- 170 cm3 increase in Nccn, possibly because of abundant organics in the aerosols. Smooth growth can be observed in the marine-traffic-derived particles, reflecting aerosol aging. The estimated hygroscopicity parameter () values were generally as high as 0.46-0.55 under the dominant onshore winds, suggesting that inorganic ammonium aerosols likely acted as the major contributor to Nccn largely through aerosol aging processes of decomposing organics. Moreover, the influences of the new transported particles from the continent on the Ncn and Nccn in the marine atmosphere were investigated. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	aerosol; aging; ammonium; atmospheric plume; cloud condensation nucleus; concentration (composition); marginal sea; maritime transportation; traffic emission; China; Vindula arsinoe
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/141152
作者单位	Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China
推荐引用方式 GB/T 7714	Gao Y.,Zhang D.,Wang J.,et al. Variations in Ncn and Nccn over marginal seas in China related to marine traffic emissions; new particle formation and aerosol aging[J],2020,20(16).
APA	Gao Y.,Zhang D.,Wang J.,Gao H.,&Yao X..(2020).Variations in Ncn and Nccn over marginal seas in China related to marine traffic emissions; new particle formation and aerosol aging.Atmospheric Chemistry and Physics,20(16).
MLA	Gao Y.,et al."Variations in Ncn and Nccn over marginal seas in China related to marine traffic emissions; new particle formation and aerosol aging".Atmospheric Chemistry and Physics 20.16(2020).