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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 (IF:5.668[JCR-2018],6.201[5-Year]) |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/141315 |
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). |
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