气候变化领域集成服务门户(CCPortal): A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene

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DOI	10.1029/2019JD031818
	A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene
	Claxton T.; Hossaini R.; Wilson C.; Montzka S.A.; Chipperfield M.P.; Wild O.; Bednarz E.M.; Carpenter L.J.; Andrews S.J.; Hackenberg S.C.; Mühle J.; Oram D.; Park S.; Park M.-K.; Atlas E.; Navarro M.; Schauffler S.; Sherry D.; Vollmer M.; Schuck T.; Engel A.; Krummel P.B.; Maione M.; Arduini J.; Saito T.; Yokouchi Y.; O'Doherty S.; Young D.; Lunder C.
发表日期	2020
ISSN	2169897X
卷号	125 期号:12
英文摘要	Dichloromethane (CH2Cl2) and perchloroethylene (C2Cl4) are chlorinated very short lived substances (Cl-VSLS) with anthropogenic sources. Recent studies highlight the increasing influence of such compounds, particularly CH2Cl2, on the stratospheric chlorine budget and therefore on ozone depletion. Here, a multiyear global-scale synthesis inversion was performed to optimize CH2Cl2 (2006–2017) and C2Cl4 (2007–2017) emissions. The approach combines long-term surface observations from global monitoring networks, output from a three-dimensional chemical transport model (TOMCAT), and novel bottom-up information on prior industry emissions. Our posterior results show an increase in global CH2Cl2 emissions from 637 ± 36 Gg yr−1 in 2006 to 1,171 ± 45 Gg yr−1 in 2017, with Asian emissions accounting for 68% and 89% of these totals, respectively. In absolute terms, Asian CH2Cl2 emissions increased annually by 51 Gg yr−1 over the study period, while European and North American emissions declined, indicating a continental-scale shift in emission distribution since the mid-2000s. For C2Cl4, we estimate a decrease in global emissions from 141 ± 14 Gg yr−1 in 2007 to 106 ± 12 Gg yr−1 in 2017. The time-varying posterior emissions offer significant improvements over the prior. Utilizing the posterior emissions leads to modeled tropospheric CH2Cl2 and C2Cl4 abundances and trends in good agreement to those observed (including independent observations to the inversion). A shorter C2Cl4 lifetime, from including an uncertain Cl sink, leads to larger global C2Cl4 emissions by a factor of ~1.5, which in some places improves model-measurement agreement. The sensitivity of our findings to assumptions in the inversion procedure, including CH2Cl2 oceanic emissions, is discussed. ©2020. The Authors.
英文关键词	dichloromethane; emissions; inversion; montreal protocol; perchloroethylene; vsls
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185965
作者单位	Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; National Centre for Earth Observation, University of Leeds, Leeds, United Kingdom; National Oceanic and Atmospheric Administration, Boulder, CO, United States; Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, United Kingdom; Scripps Institution of Oceanography, University of California, San Diego, CA, United States; National Centre for Atmospheric Science, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; Kyungpook Institute of Oceanography, Kyungpook National University, Daegu, South Korea; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; National Centre for Atmospheric Research, Boulder, CO, United States; Nolan Sherry & Associates, London, United Kingdom; Laboratory for Air Pollution and Environmental Technology, Empa,...
推荐引用方式 GB/T 7714	Claxton T.,Hossaini R.,Wilson C.,et al. A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene[J],2020,125(12).
APA	Claxton T..,Hossaini R..,Wilson C..,Montzka S.A..,Chipperfield M.P..,...&Lunder C..(2020).A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene.Journal of Geophysical Research: Atmospheres,125(12).
MLA	Claxton T.,et al."A Synthesis Inversion to Constrain Global Emissions of Two Very Short Lived Chlorocarbons: Dichloromethane, and Perchloroethylene".Journal of Geophysical Research: Atmospheres 125.12(2020).