气候变化领域集成服务门户(CCPortal): Atmospheric CH3CCl3 observations in China: Historical trends and implications

CCPortal

DOI	10.1016/j.atmosres.2019.104658
	Atmospheric CH3CCl3 observations in China: Historical trends and implications
	Yu D.; Yao B.; Lin W.; Vollmer M.K.; Ge B.; Zhang G.; Li Y.; Xu H.; O'Doherty S.; Chen L.; Reimann S.
发表日期	2020
ISSN	0169-8095
卷号	231
英文摘要	Although CH3CCl3 is an important ozone-depleting substance regulated by the Montreal Protocol on Substances that Deplete the Ozone Layer and its Amendments, the levels of atmospheric CH3CCl3 mixing ratios in China are poorly understood. Long-term in-situ measurements by GC-ECD have been conducted at the Shangdianzi Station in northern China since October 2006. In addition, air samples have been collected daily/weekly at seven stations and analyzed by GC/MS system since 2010. The two methods show comparable precisions at around 1% and all the measurements were calibrated by standards linked to the Advanced Global Atmospheric Gases Experiment (AGAGE) reference scale Scripps Institution of Oceanography (SIO)-05. Mixing ratios for both “background” and “polluted” conditions are reported. The atmospheric CH3CCl3 mixing ratios during background conditions showed a significant and consistent decreasing trend with a decline rate from 1.9 ppt/yr (October 2006 to December 2007) to 0.3 ppt/yr (November 2015 to December 2017) at the Shangdianzi Station. Measured background mixing ratios increased from 41% in 2007 to 95% in 2017. The mean mixing ratios and their enhancement of polluted conditions have decreased from 15.1 and 2.0 ppt in 2007 to 2.7 and 0.3 ppt in 2017 at Shangdianzi. The mixing ratios in air at background conditions at the seven stations in China agree well with each other and all decrease gradually. The percentage of pollution events to the total number of measurements (POL/SUM) at Lin'an has decreased significantly from 2010 to 2017, especially after 2013. In 2017, POL/SUMs of all stations were <8% and the enhancements above background were <0.7 ppt. Both mixing ratios and enhancements have decreased by one or two orders of magnitude when comparing the results from previous studies, in the early 2000s, with the results in 2017 from this study. Chinese emissions of CH3CCl3, which were estimated by a tracer-ratio method, have decreased from 1.6 kt/yr in 2007 to 0.3 kt/yr in 2013, indicating that CH3CCl3 has been phased-out in China in accordance with the Montreal Protocol. © 2019 Elsevier B.V.
英文关键词	Atmospheric mixing ratios; Background levels; CH3CCl3; Emissions; Long-term trend
学科领域	Air quality; Chromatographic analysis; Mixing; Ozone; Ozone layer; Particulate emissions; Polyols; Atmospheric mixing; Background conditions; Background level; Background mixing ratios; CH3CCl3; Long-term trend; Ozone depleting substances; Scripps institution of oceanographies; Chlorine compounds; air quality; atmospheric pollution; carbon emission; concentration (composition); mixing ratio; ozone depletion; pollution monitoring; tracer; trend analysis; Beijing [China]; China; Shangdianzi
语种	英语
scopus关键词	Air quality; Chromatographic analysis; Mixing; Ozone; Ozone layer; Particulate emissions; Polyols; Atmospheric mixing; Background conditions; Background level; Background mixing ratios; CH3CCl3; Long-term trend; Ozone depleting substances; Scripps institution of oceanographies; Chlorine compounds; air quality; atmospheric pollution; carbon emission; concentration (composition); mixing ratio; ozone depletion; pollution monitoring; tracer; trend analysis; Beijing [China]; China; Shangdianzi
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120624
作者单位	Longfengshan Regional Background Station, China Meteorological Administration (CMA), Heilongjiang, China; Meteorological Observation Center (MOC) of China Meteorological Administration (CMA), Beijing, China; College of Life and Environmental Sciences, Minzu University of China, Beijing, China; Laboratory for Air Pollution and Environmental Technology, Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf, Switzerland; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Chinese Academy of Sciences, Institute of Atmospheric Physics, Beijing, China; State Key Laboratory of Severe Weather & Key Laboratory of Atmospheric Chemistry of China Meteorological Administration (CMA), Chinese Academy of Meteorological Sciences (CAMS), Beijing, China; Zhejiang Institute of Meteorological Sciences, Hangzhou, China; Atmospheric Chemistry Research Group, University of Bristol, Bristol, United Kingdom
推荐引用方式 GB/T 7714	Yu D.,Yao B.,Lin W.,et al. Atmospheric CH3CCl3 observations in China: Historical trends and implications[J],2020,231.
APA	Yu D..,Yao B..,Lin W..,Vollmer M.K..,Ge B..,...&Reimann S..(2020).Atmospheric CH3CCl3 observations in China: Historical trends and implications.Atmospheric Research,231.
MLA	Yu D.,et al."Atmospheric CH3CCl3 observations in China: Historical trends and implications".Atmospheric Research 231(2020).