气候变化领域集成服务门户(CCPortal): Evidence for energetic particle precipitation and quasi-biennial oscillation modulations of the Antarctic NO2 springtime stratospheric column from OMI observations

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DOI	10.5194/acp-20-6259-2020
	Evidence for energetic particle precipitation and quasi-biennial oscillation modulations of the Antarctic NO2 springtime stratospheric column from OMI observations
	Gordon E.M.; Seppälä A.; Tamminen J.
发表日期	2020
ISSN	1680-7316
起始页码	6259
结束页码	6271
卷号	20 期号:11
英文摘要	Observations from the Ozone Monitoring Instrument (OMI) on the Aura satellite are used to study the effect of energetic particle precipitation (EPP, as proxied by the geomagnetic activity index, Ap) on the Antarctic stratospheric NO2 column in late winter-spring (August-December) during the period from 2005 to 2017. We show that the polar (60-90 S) stratospheric NO2 column is significantly correlated with EPP throughout the Antarctic spring, until the breakdown of the polar vortex in November. The strongest correlation takes place during years with the easterly phase of the quasi-biennial oscillation (QBO). The QBO modulation may be a combination of different effects: the QBO is known to influence the amount of the primary NOx source (N2O) via transport from the Equator to the polar region; and the QBO phase also affects polar temperatures, which may provide a link to the amount of denitrification occurring in the polar vortex. We find some support for the latter in an analysis of temperature and HNO3 observations from the Microwave Limb Sounder (MLS, on Aura). Our results suggest that once the background effect of the QBO is accounted for, the NOx produced by EPP significantly contributes to the stratospheric NO2 column at the time and altitudes when the ozone hole is present in the Antarctic stratosphere. Based on our findings, and the known role of NOx as a catalyst for ozone loss, we propose that as chlorine activation continues to decrease in the Antarctic stratosphere, the total EPP-NOx needs be accounted for in predictions of Antarctic ozone recovery. © Author(s) 2020.
语种	英语
scopus关键词	atmospheric chemistry; catalyst; correlation; monitoring system; nitrogen dioxide; nitrogen oxides; ozone; quasi-biennial oscillation; satellite data; spring (season); stratosphere; Antarctica
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247751
作者单位	Department of Physics, University of Otago, Dunedin, New Zealand; Space and Earth Observation Centre, Finnish Meteorological Institute, Helsinki, Finland
推荐引用方式 GB/T 7714	Gordon E.M.,Seppälä A.,Tamminen J.. Evidence for energetic particle precipitation and quasi-biennial oscillation modulations of the Antarctic NO2 springtime stratospheric column from OMI observations[J],2020,20(11).
APA	Gordon E.M.,Seppälä A.,&Tamminen J..(2020).Evidence for energetic particle precipitation and quasi-biennial oscillation modulations of the Antarctic NO2 springtime stratospheric column from OMI observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(11).
MLA	Gordon E.M.,et al."Evidence for energetic particle precipitation and quasi-biennial oscillation modulations of the Antarctic NO2 springtime stratospheric column from OMI observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.11(2020).