气候变化领域集成服务门户(CCPortal): Measurement report: Source characteristics of water-soluble organic carbon in PM2.5 at two sites in Japan, as assessed by long-term observation and stable carbon isotope ratio

CCPortal

DOI	10.5194/acp-21-11815-2021
	Measurement report: Source characteristics of water-soluble organic carbon in PM2.5 at two sites in Japan, as assessed by long-term observation and stable carbon isotope ratio
	Suto N.; Kawashima H.
发表日期	2021
ISSN	1680-7316
起始页码	11815
结束页码	11828
卷号	21 期号:15
英文摘要	The sources and seasonal trends of water-soluble organic carbon (WSOC) in carbonaceous aerosols are of significant interest. From July 2017 to July 2019, we collected samples of PM2.5 (particulate matter, aerodynamic diameter<2.5μm) from one suburban and one rural site in Japan. The average δ13CWSOC was -25.2±1.1¯‰ and -24.6±2.4¯‰ at the suburban site and rural site, respectively. At the suburban site, the δ13CWSOC was consistent with the δ13C of burned C3 plants, and a high correlation was found between WSOC concentrations and non-sea-salt potassium concentrations; these results suggest that the main source of WSOC at this site was biomass burning of rice straw. At the rural site, the average δ13CWSOC was significantly heavier from autumn to spring (-23.9±2.1¯‰) than in summer (-27.4±0.7¯‰) (p<0.01). The δ13CWSOC from autumn to spring was consistent with that of biomass burning of rice straw, whereas that in summer was considered to reflect mainly the formation of secondary organic aerosols from biogenic volatile organic compounds (VOCs). The heaviest δ13CWSOC (-21.3±1.9¯‰) was observed from February to April 2019, which may be explained by long-range transport of C4 plant burning such as corn from overseas. Thus, the present study indicates that δ13CWSOC is potentially useful for elucidating the sources and atmospheric processes that contribute to seasonal variations of WSOC concentration. © Copyright:
语种	英语
scopus关键词	aerosol; carbon isotope; isotopic ratio; organic carbon; particulate matter; stable isotope; volatile organic compound; Japan
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/246673
作者单位	Energy and Environment Research Division, Japan Automobile Research Institute, Tsukuba, 3050822, Japan; Faculty of Systems Science and Technology, Akita Prefectural University, Yurihonjo, 0150055, Japan
推荐引用方式 GB/T 7714	Suto N.,Kawashima H.. Measurement report: Source characteristics of water-soluble organic carbon in PM2.5 at two sites in Japan, as assessed by long-term observation and stable carbon isotope ratio[J],2021,21(15).
APA	Suto N.,&Kawashima H..(2021).Measurement report: Source characteristics of water-soluble organic carbon in PM2.5 at two sites in Japan, as assessed by long-term observation and stable carbon isotope ratio.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(15).
MLA	Suto N.,et al."Measurement report: Source characteristics of water-soluble organic carbon in PM2.5 at two sites in Japan, as assessed by long-term observation and stable carbon isotope ratio".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.15(2021).