Temporal patterns and source regions of atmospheric carbon monoxide at two background stations in China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Temporal patterns and source regions of atmospheric carbon monoxide at two background stations in China
	Liu, Shuo ; Fang, Shuangxi ; Liang, Miao ; Sun, Wanqi ; Feng, Zhaozhong
刊名	ATMOSPHERIC RESEARCH
	2019-05-15
卷号	220 页码:169-180
关键词	Carbon monoxide (CO) Temporal variations Source apportionment Trend analysis
ISSN号	0169-8095
英文摘要	Atmospheric carbon monoxide (CO) was continuously measured from 2010/2011 to 2017 at Lin'an (LAN) and Shangdianzi (SDZ) background station in the economically developed region in China using cavity ring-down spectrometers. Diurnal variations of CO mixing ratio displayed a bimodal in all seasons, with the peak to trough amplitudes larger than 43.6 +/- 18.5 (95% CI) ppb at LAN and 80.5 +/- 47.0 ppb at SDZ, reflecting the influence of anthropogenic emissions. Seasonal variation at LAN was in accordance with those observed in the northern hemisphere. Due to the multiple influences of regional sources and meteorological transport, CO at SDZ displayed an abnormal pattern, with a maximum in summer and the minimum in autumn. CO levels decreased at a rate of 16.3 +/- 0.3 ppb yr(-1) at LAN and 1.3 +/- 0.4 ppb yr(-1) at SDZ during the six-year period. The 3-day back trajectory by the HYSPLIT model showed that high CO at LAN was mainly from the economically developed regions, including the North China Plain, the Middle-Lower Yangtze Plain and the eastern region of the station. The analysis by concentration-weighted trajectory (CWT) approach indicated that large-scale of strong source regions were uniformly distributed around the LAN site in all seasons. At SDZ, atmospheric CO was severely influenced by monsoons and air masses from the south-southeastern site. Major source areas were identified in megacities such as Beijing, Tianjin, and Tangshan, especially in summer. Consequently, most of the atmospheric CO mole fractions at SDZ could be defined into two subsets, with higher values associated with air masses from the south and lower ones from the north.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42812]
专题	生态环境研究中心_城市与区域生态国家重点实验室
作者单位	1.CMA, MOC, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing 210044, Jiangsu, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shuo,Fang, Shuangxi,Liang, Miao,et al. Temporal patterns and source regions of atmospheric carbon monoxide at two background stations in China[J]. ATMOSPHERIC RESEARCH,2019,220:169-180.
APA	Liu, Shuo,Fang, Shuangxi,Liang, Miao,Sun, Wanqi,&Feng, Zhaozhong.(2019).Temporal patterns and source regions of atmospheric carbon monoxide at two background stations in China.ATMOSPHERIC RESEARCH,220,169-180.
MLA	Liu, Shuo,et al."Temporal patterns and source regions of atmospheric carbon monoxide at two background stations in China".ATMOSPHERIC RESEARCH 220(2019):169-180.