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DOI10.1029/2020GL088567
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
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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).
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