气候变化领域集成服务门户(CCPortal): Temporal variation in 129I and 127I in aerosols from Xi'an, China: Influence of East Asian monsoon and heavy haze events

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DOI	10.5194/acp-20-2623-2020
	Temporal variation in 129I and 127I in aerosols from Xi'an, China: Influence of East Asian monsoon and heavy haze events
	Zhang L.; Hou X.; Xu S.; Feng T.; Cheng P.; Fu Y.; Chen N.
发表日期	2020
ISSN	16807316
起始页码	2623
结束页码	2635
卷号	20 期号:4
英文摘要	Aerosol iodine isotopes are pivotal links in atmospheric circulation of iodine in both atmospheric and nuclear sciences, while their sources, temporal change and transport mechanism are still not well understood. This work presents the day-resolution temporal variation in iodine-129 (129I) and iodine-127 (127I) concentrations in aerosols from Xi an, north-west China, during 2017/18. Both iodine isotopes have significant fluctuations with time, showing the highest levels in winter, approximately 2 3 times higher than in other seasons, but the correlation between 129I and 127I concentrations reflects that they have different sources. Aerosol 127I concentrations are found to be noticeably positively correlated with air quality index and five air pollutants. Enhanced fossil fuel combustion and inverse weather conditions can explain the increased concentrations and peaks of 127I in winter. The change in 129I concentrations confirms that the source and level of 129I in the monsoonal region were alternatively dominated by the 129I-enriched East Asian winter monsoon and the 129I-poor East Asian summer monsoon. The mean 129I=127I number ratio of (92:7±124)times;10-10 provides an atmospheric background level for the purpose of nuclear environmental safety monitoring. This study suggests that locally discharged stable127I and externally input 129I are likely involved in fine particles formation in urban air, which provides insights into the long-range transport of air pollutants and iodine s role in particulate formation in urban atmosphere. © 2020 BMJ Publishing Group. All rights reserved.
关键词	aerosol aerosol composition air quality atmospheric pollution combustion concentration (composition)formation mechanism haze iodine isotopic composition monsoon temporal variation urban atmosphere China Shaanxi Xian
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132194
推荐引用方式 GB/T 7714	Zhang L.,Hou X.,Xu S.,et al. Temporal variation in 129I and 127I in aerosols from Xi'an, China: Influence of East Asian monsoon and heavy haze events[J]. Atmospheric Chemistry and Physics,2020,20(4).
APA	Zhang L..,Hou X..,Xu S..,Feng T..,Cheng P..,...&Chen N..(2020).Temporal variation in 129I and 127I in aerosols from Xi'an, China: Influence of East Asian monsoon and heavy haze events.,20(4).
MLA	Zhang L.,et al."Temporal variation in 129I and 127I in aerosols from Xi'an, China: Influence of East Asian monsoon and heavy haze events".20.4(2020).