Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-11729-2018 |
Toward resolving the budget discrepancy of ozone-depleting carbon tetrachloride (CCl4): an analysis of top-down emissions from China | |
Park, Sunyoung1; 39;Doherty, Simon2 | |
2018-08-17 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:16页码:11729-11738 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; USA; England; Switzerland |
英文摘要 | Carbon tetrachloride (CCl4) is a first-generation ozone-depleting substance, and its emissive use and production were globally banned by the Montreal Protocol with a 2010 phase-out; however, production and consumption for non-dispersive use as a chemical feedstock and as a process agent are still allowed. This study uses the high frequency and magnitude of CCl4 pollution events from an 8-year real-time atmospheric measurement record obtained at Gosan station (a regional background monitoring site in East Asia) to present evidence of significant unreported emissions of CCl4. Top-down emissions of CCl4 amounting to 23.6 +/- 7.1 Gg yr(-1) from 2011 to 2015 are estimated for China, in contrast to the most recently reported, post-2010, Chinese bottom-up emissions of 4.3-5.2 Gg yr(-1). The missing emissions (similar to 19 Gg yr(-1)) for China contribute to approximately 54% of global CCl4 emissions. It is also shown that 89% +/- 6% of CCl4 enhancements observed at Gosan are related to CCl4 emissions from the production of CH3Cl, CH2Cl2, CHCl3 and C2Cl4 and its usage as a feedstock and process agent in chemical manufacturing industries. Specific sources and processes are identified using statistical methods, and it is considered highly unlikely that CCl4 is emitted by dispersive uses such as old landfills, contaminated soils and solvent usage. It is thus crucial to implement technical improvements and better regulation strategies to reduce evaporative losses of CCl4 occurring at the factory and/or process levels. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000441992900004 |
WOS关键词 | POSITIVE MATRIX FACTORIZATION ; EAST-ASIA ; ATMOSPHERIC OBSERVATIONS ; HALOGENATED COMPOUNDS ; HALOCARBON EMISSIONS ; JEJU ISLAND ; KOREA ; JUNGFRAUJOCH ; SULFATE ; EUROPE |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27252 |
专题 | 地球科学 |
作者单位 | 1.Kyungpook Natl Univ, Dept Oceanog, Daegu 41566, South Korea; 2.Kyungpook Natl Univ, Kyungpook Inst Oceanog, Daegu 41566, South Korea; 3.Natl Inst Meteorol Sci, Climate Res Div, Seogwipo, South Korea; 4.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 5.Univ Bristol, Sch Chem, Bristol, Avon, England; 6.MIT, Ctr Global Change Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 7.Empa, Swiss Fed Labs Mat Sci & Technol, Lab Air Pollut & Environm Technol, Uberlandstr 129, CH-8600 Dubendorf, Switzerland |
推荐引用方式 GB/T 7714 | Park, Sunyoung,39;Doherty, Simon. Toward resolving the budget discrepancy of ozone-depleting carbon tetrachloride (CCl4): an analysis of top-down emissions from China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(16):11729-11738. |
APA | Park, Sunyoung,&39;Doherty, Simon.(2018).Toward resolving the budget discrepancy of ozone-depleting carbon tetrachloride (CCl4): an analysis of top-down emissions from China.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(16),11729-11738. |
MLA | Park, Sunyoung,et al."Toward resolving the budget discrepancy of ozone-depleting carbon tetrachloride (CCl4): an analysis of top-down emissions from China".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.16(2018):11729-11738. |
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