气候变化领域集成服务门户(CCPortal): Ice Core Record of Persistent Short-Chain Fluorinated Alkyl Acids: Evidence of the Impact From Global Environmental Regulations

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DOI	10.1029/2020GL087535
	Ice Core Record of Persistent Short-Chain Fluorinated Alkyl Acids: Evidence of the Impact From Global Environmental Regulations
	Pickard H.M.; Criscitiello A.S.; Persaud D.; Spencer C.; Muir D.C.G.; Lehnherr I.; Sharp M.J.; De Silva A.O.; Young C.J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:10
英文摘要	Short chain perfluoroalkylcarboxylic acids (scPFCAs, CxF2x+1COOH, x ≤ 3) are persistent compounds formed from atmospheric oxidation of fluorotelomer compounds and chlorofluorocarbon (CFC) replacements introduced as a result of the Montreal Protocol. Understanding sources and impacts of scPFCAs has been limited by observational data. We report multidecadal depositional fluxes for trifluoroacetic acid (TFA), perfluoropropionic acid (PFPrA), and perfluorobutanoic acid (PFBA) from two Arctic ice cores. Fluxes of all three scPFCAs increase starting around 1990. Through comparison with chemical transport models and assessment of temporal trends, we observe the importance of CFC replacements in the increased deposition of TFA. Fluorotelomer degradation may contribute to the deposition of PFBA but is insignificant for TFA and PFPrA. Deposition of TFA is expected to increase as new CFC replacement compounds are phased in. This work demonstrates the increased environmental burden of persistent and potentially toxic scPFCAs as a result of global regulation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Deposition; Atmospheric oxidation; Chemical transport models; Depositional fluxes; Environmental burdens; Montreal Protocols; Observational data; Perfluoropropionic acids; Persistent compounds; Environmental regulations; atmospheric pollution; CFC; chemical compound; degradation; global perspective; ice core; oxidation; persistence; pollutant source; Arctic; Arctic Ocean
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170351
作者单位	Department of Chemistry, Memorial University, St. John's, NL, Canada; Now at: Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, United States; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada; Department of Chemistry, York University, Toronto, ON, Canada; Aquatic Contaminants Research Division, Environment and Climate Change Canada, Burlington, ON, Canada; Department of Geography, University of Toronto-Mississauga, Mississauga, ON, Canada
推荐引用方式 GB/T 7714	Pickard H.M.,Criscitiello A.S.,Persaud D.,et al. Ice Core Record of Persistent Short-Chain Fluorinated Alkyl Acids: Evidence of the Impact From Global Environmental Regulations[J],2020,47(10).
APA	Pickard H.M..,Criscitiello A.S..,Persaud D..,Spencer C..,Muir D.C.G..,...&Young C.J..(2020).Ice Core Record of Persistent Short-Chain Fluorinated Alkyl Acids: Evidence of the Impact From Global Environmental Regulations.Geophysical Research Letters,47(10).
MLA	Pickard H.M.,et al."Ice Core Record of Persistent Short-Chain Fluorinated Alkyl Acids: Evidence of the Impact From Global Environmental Regulations".Geophysical Research Letters 47.10(2020).