气候变化领域集成服务门户(CCPortal): Long-term temporal variations and source changes of halocarbons in the Greater Pearl River Delta region, China

CCPortal

DOI	10.1016/j.atmosenv.2020.117550
	Long-term temporal variations and source changes of halocarbons in the Greater Pearl River Delta region, China
	Zeng L.; Dang J.; Guo H.; Lyu X.; Simpson I.J.; Meinardi S.; Wang Y.; Zhang L.; Blake D.R.
发表日期	2020
ISSN	1352-2310
卷号	234
英文摘要	Halocarbons are widely used in the Greater Pearl River Delta (PRD) region of China. To study the long-term trends, source changes and emissions of major halocarbons, a total of 1505 canister air samples were collected in the Greater PRD region during 2001–2018. Mixing ratios of CFCs decreased significantly over the past 18 years except for CFC-114, which significantly increased in the Greater PRD, consistent with the recent observations of significant CFC-114 emissions in East Asia. Declines in CFCs in the Greater PRD region were faster than those at the background Mauna Loa (MLO) site, indicating effective control regulations. Source apportionment simulations showed that refrigeration applications, including refrigeration industry and CFCs replacement, were the main sources of halocarbons. During the study period, refrigeration industry experienced a progressive decline in both mixing ratio and percentage, while the contribution of CFCs replacement remained increasing. Contribution of solvent use in electronic industry traced by C2Cl4 dramatically decreased during the study period, and stayed at a low level in recent years. Based on the measured ratios of halocarbons to CO, the estimated total halocarbon emissions in 2016 were 46.5 ± 16.7 Gg for the Greater PRD region. This study provides useful information for examining the evolving emission status of halocarbons in the Greater PRD region in response to control strategies and changing usage. © 2020 Elsevier Ltd
英文关键词	Emission estimation; Greater pearl river delta; Halocarbons; Long-term trends; Source apportionment
语种	英语
scopus关键词	Chlorine compounds; Chlorofluorocarbons; Electronics industry; Mixing; Polyols; Refrigeration; Control strategies; Electronic industries; Long-term trend; Mixing ratios; Pearl River delta; Pearl River Delta region; Source apportionment; Temporal variation; Halocarbons; halocarbon; norflurane; air sampling; carbon monoxide; electronics industry; halocarbon; long-term change; mixing ratio; source apportionment; temporal variation; air quality; air sampling; ambient air; Article; carbon footprint; carbon source; chemical analysis; China; comparative study; control strategy; greenhouse effect; ion monitoring; priority journal; China; Guangdong; Hawaii [(ISL) Hawaiian Islands]; Hawaii [United States]; Hawaiian Islands; Mauna Loa; Zhujiang Delta
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129437
作者单位	Air Quality Studies, Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong; Department of Chemistry, University of California at Irvine, United States
推荐引用方式 GB/T 7714	Zeng L.,Dang J.,Guo H.,et al. Long-term temporal variations and source changes of halocarbons in the Greater Pearl River Delta region, China[J],2020,234.
APA	Zeng L..,Dang J..,Guo H..,Lyu X..,Simpson I.J..,...&Blake D.R..(2020).Long-term temporal variations and source changes of halocarbons in the Greater Pearl River Delta region, China.Atmospheric Environment,234.
MLA	Zeng L.,et al."Long-term temporal variations and source changes of halocarbons in the Greater Pearl River Delta region, China".Atmospheric Environment 234(2020).