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DOI	10.1029/2020JD033979
	How Atmospheric Chemistry and Transport Drive Surface Variability of N2O and CFC-11
	Ruiz D.J.; Prather M.J.; Strahan S.E.; Thompson R.L.; Froidevaux L.; Steenrod S.D.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	Nitrous oxide (N2O) is a long-lived greenhouse gas that affects atmospheric chemistry and climate. In this work, we use satellite measurements of N2O, ozone (O3), and temperature from the Aura Microwave Limb Sounder (MLS) instrument to calculate stratospheric loss of N2O, and thus its atmospheric lifetime. Using three chemistry transport models simulating the Aura period 2005–2017, we verify the stratospheric sink using MLS data and follow that loss signal down to the surface and compare with surface observations. Stratospheric loss has a strong seasonal cycle and is further modulated by the Quasi-Biennial Oscillation (QBO); these cycles are seen equally in both observations and the models. When filtered for interannual variability, the modeled surface signal is QBO-caused, and it reproduces the observed pattern, highlighting the potential role of the QBO in tropospheric chemistry and composition, as well as in model evaluation. The observed annual surface signal in the northern hemisphere matches well with the models run without emissions, indicating the annual cycle is driven mostly by stratosphere-troposphere exchange (STE) flux of N2O-depleted air and not surface N2O emissions. In the southern hemisphere (SH), all three models disagree and thus provide no guidance, except for indicating that modeling annual STE in the SH remains a major model uncertainty. Parallel model simulations of CFCl3, which has greater stratospheric loss that N2O and possibly surreptitious emissions, show that its interannual variations parallel those of N2O, and thus the observed N2O variability can identify the stratospheric component of the observed CFCl3 variability. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Chlorofluorocarbon-11; N2O; N2O Lifetime; QBO; Stratosphere-Troposphere Exchange (STE); Variability and Trends of GHG
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/185287
作者单位	Department of Earth System Science, University of California, Irvine, CA, United States; NASA, Goddard Space Flight Center, Greenbelt, MA, United States; Norwegian Institute for Air Research, Kjeller, Norway; NASA, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Ruiz D.J.,Prather M.J.,Strahan S.E.,et al. How Atmospheric Chemistry and Transport Drive Surface Variability of N2O and CFC-11[J],2021,126(8).
APA	Ruiz D.J.,Prather M.J.,Strahan S.E.,Thompson R.L.,Froidevaux L.,&Steenrod S.D..(2021).How Atmospheric Chemistry and Transport Drive Surface Variability of N2O and CFC-11.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Ruiz D.J.,et al."How Atmospheric Chemistry and Transport Drive Surface Variability of N2O and CFC-11".Journal of Geophysical Research: Atmospheres 126.8(2021).