气候变化领域集成服务门户(CCPortal): Causes of Enhanced Bromine Levels in Alpine Ice Cores During the 20th Century: Implications for Bromine in the Free European Troposphere

CCPortal

DOI	10.1029/2020JD034246
	Causes of Enhanced Bromine Levels in Alpine Ice Cores During the 20th Century: Implications for Bromine in the Free European Troposphere
	Legrand M.; McConnell J.R.; Preunkert S.; Chellman N.J.; Arienzo M.M.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	Total bromine (Br) was investigated in seasonally resolved alpine ice cores covering the 20th century. Results revealed increased Br concentrations in summer (from 0.7 ng g−1 in the late 1940s to 1.6 ng g−1 in the mid 1970s), followed by a slight decrease to 1.25 ng g−1 during the last decade of the 20th century. In winter, a more moderate increase was observed from before 1950 (0.35 ng g−1) to the 1970–2000 period (∼0.50 ng g−1). Measurements of lead suggest that ∼75% of the bromine increase in summer alpine ice between 1930–1950 and 1965–1985 was from bromine-containing aerosol (PbBrCl) emitted during the combustion of leaded gasoline. This contribution decreased to ∼27% in 2000 following the large decrease of lead additive content in gasoline used in western Europe. Summer ice bromine concentrations, not related to PbBrCl aerosol (denoted Bry), increased by 40% from the late 1940s to the 1990–2000 decade. In winter, the contribution of leaded-gasoline aerosol to total bromine levels was weaker than in summer, with the winter bromine trend mainly caused by enhanced Bry levels (∼40%) after 1950. These Bry* variations in glacial ice are discussed in terms of past atmospheric reactive bromine (Bry) changes in the European troposphere, including anthropogenic CH3Br emissions and transport from the stratosphere. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Alpine ice core trend; bromine; CH3Br emission; leaded gasoline emission
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/185314
作者单位	IGE, Institut des Géosciences de l'Environnement, UMR 5001, CNRS, Université Grenoble Alpes, Grenoble, France; Laboratoire Interuniversitaire des Systèmes Atmosphériques, UMR CNRS 7583, Université Paris-Est-Créteil, Université de Paris, Institut Pierre Simon Laplace, Créteil, France; Division of Hydrologic Sciences, Desert Research Institute, Reno, NV, United States
推荐引用方式 GB/T 7714	Legrand M.,McConnell J.R.,Preunkert S.,et al. Causes of Enhanced Bromine Levels in Alpine Ice Cores During the 20th Century: Implications for Bromine in the Free European Troposphere[J],2021,126(8).
APA	Legrand M.,McConnell J.R.,Preunkert S.,Chellman N.J.,&Arienzo M.M..(2021).Causes of Enhanced Bromine Levels in Alpine Ice Cores During the 20th Century: Implications for Bromine in the Free European Troposphere.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Legrand M.,et al."Causes of Enhanced Bromine Levels in Alpine Ice Cores During the 20th Century: Implications for Bromine in the Free European Troposphere".Journal of Geophysical Research: Atmospheres 126.8(2021).