气候变化领域集成服务门户(CCPortal): The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations

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DOI	10.1029/2020JD033335
	The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations
	Wargan K.; Weir B.; Manney G.L.; Cohn S.E.; Livesey N.J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	A rare disturbance of the stratospheric Antarctic polar vortex in September 2019 led to a significantly higher than usual polar total ozone column. We use assimilation of ozone, HCl, and N2O data from the Microwave Limb Sounder with the Global Earth Observing System (GEOS) Constituent Data Assimilation System driven by reanalysis meteorology to study the evolution of the 2019 Antarctic polar ozone. We find that the maximum 2019 ozone hole area was near 10 × 106 km2, and as little as 20% of that in 2018 in mid-September. However, the magnitude of vortex-averaged chemical ozone depletion was not significantly different between the 2 years despite earlier chlorine deactivation in 2019. The assimilation results show that most of the differences between 2018 and 2019 Antarctic ozone resulted from two factors: (1) the geometry of the 2019 vortex, with ozone-rich middle-stratospheric air masses overlying the lower portion of the vortex and leading to a significant reduction of the total column, and (2) significantly reduced vortex volume. The anomalously small ozone hole of 2019 was comparable in size to the record breaking 2002 case and the mechanisms responsible were similar in the two cases. While the 2019 sudden stratospheric warming is classified as minor, its impact on ozone was very significant. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	assimilation; ozone; polar; stratosphere
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/185737
作者单位	Science Systems and Applications, Inc., Lanham, MD, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Universities Space Research Association, Columbia, MD, United States; NorthWest Research Associates, Socorro, NM, United States; Department of Physics, New Mexico Institute of Mining and Technology, Socorro, NM, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Wargan K.,Weir B.,Manney G.L.,et al. The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations[J],2020,125(18).
APA	Wargan K.,Weir B.,Manney G.L.,Cohn S.E.,&Livesey N.J..(2020).The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Wargan K.,et al."The Anomalous 2019 Antarctic Ozone Hole in the GEOS Constituent Data Assimilation System With MLS Observations".Journal of Geophysical Research: Atmospheres 125.18(2020).