气候变化领域集成服务门户(CCPortal): Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018

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DOI	10.1029/2020GL088567
	Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018
	Strahan S.E.; Smale D.; Douglass A.R.; Blumenstock T.; Hannigan J.W.; Hase F.; Jones N.B.; Mahieu E.; Notholt J.; Oman L.D.; Ortega I.; Palm M.; Prignon M.; Robinson J.; Schneider M.; Sussmann R.; Velazco V.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Total columns of the trace gases nitric acid (HNO3) and hydrogen chloride (HCl) are sensitive to variations in the lower stratospheric age of air, a quantity that describes transport time scales in the stratosphere. Analyses of HNO3 and HCl columns from the Network for the Detection of Atmospheric Composition Change panning 77°S to 79°N have detected changes in the extratropical stratospheric transport circulation from 1994 to 2018. The HNO3 and HCl analyses combined with the age of air from a simulation using the MERRA2 reanalysis show that the Southern Hemisphere lower stratosphere has become 1 month/decade younger relative to the Northern Hemisphere, largely driven by the Southern Hemisphere transport circulation. The analyses reveal multiyear anomalies with a 5- to 7-year period driven by interactions between the circulation and the quasi-biennial oscillation in tropical winds. This hitherto unrecognized variability is large relative to hemispheric transport trends and may bias ozone trend regressions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric composition; Atmospheric movements; Nitric acid; Hemi-spheric asymmetries; Hydrogen chloride; Lower stratosphere; Northern Hemispheres; Quasi-biennial oscillation; Southern Hemisphere; Transport time; Tropical winds; Chlorine compounds; atmospheric circulation; atmospheric wave; chloride; extratropical environment; hydrogen; nitric acid; ozone; quasi-biennial oscillation; Southern Hemisphere; stratosphere; tropical region; wind velocity
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/169787
作者单位	Universities Space Research Association, Columbia, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; National Institute of Water and Atmospheric Research Ltd., Auckland, New Zealand; IMK-IFU, Karlsruhe Institute of Technology, Karlsruhe, Germany; National Center for Atmospheric Research, Boulder, CO, United States; School of Physics, Wollongong University, Wollongong, NSW, Australia; Institute of Astrophysics and Geophysics, University of Liège, Liège, Belgium; Institute of Environmental Physics, University of Bremen, Bremen, Germany; IMK-ASF, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany; Centre for Atmospheric Chemistry, Wollongong University, Wollongong, NSW, Australia
推荐引用方式 GB/T 7714	Strahan S.E.,Smale D.,Douglass A.R.,et al. Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018[J],2020,47(17).
APA	Strahan S.E..,Smale D..,Douglass A.R..,Blumenstock T..,Hannigan J.W..,...&Velazco V.A..(2020).Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018.Geophysical Research Letters,47(17).
MLA	Strahan S.E.,et al."Observed Hemispheric Asymmetry in Stratospheric Transport Trends From 1994 to 2018".Geophysical Research Letters 47.17(2020).