气候变化领域集成服务门户(CCPortal): Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters

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DOI	10.1029/2020JD034356
	Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters
	Wohltmann I.; von der Gathen P.; Lehmann R.; Deckelmann H.; Manney G.L.; Davies J.; Tarasick D.; Jepsen N.; Kivi R.; Lyall N.; Rex M.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	The winter 2019/2020 showed the lowest ozone mixing ratios ever observed in the Arctic winter stratosphere. It was the coldest Arctic stratospheric winter on record and was characterized by an unusually strong and long-lasting polar vortex. We study the chemical evolution and ozone depletion in the winter 2019/2020 using the global Chemistry and Transport Model ATLAS. We examine whether the chemical processes in 2019/2020 are more characteristic of typical conditions in Antarctic winters or in average Arctic winters. Model runs for the winter 2019/2020 are compared to simulations of the Arctic winters 2004/2005, 2009/2010, and 2010/2011 and of the Antarctic winters 2006 and 2011, to assess differences in chemical evolution in winters with different meteorological conditions. In some respects, the winter 2019/2020 (and also the winter 2010/2011) was a hybrid between Arctic and Antarctic conditions, for example, with respect to the fraction of chlorine deactivation into HCl versus (Formula presented.), the amount of denitrification, and the importance of the heterogeneous HOCl + HCl reaction for chlorine activation. The pronounced ozone minimum of less than 0.2 ppm at about 450 K potential temperature that was observed in about 20% of the polar vortex area in 2019/2020 was caused by exceptionally long periods in the history of these air masses with low temperatures in sunlight. Based on a simple extrapolation of observed loss rates, only an additional 21–46 h spent below the upper temperature limit for polar stratospheric cloud formation and in sunlight would have been necessary to reduce ozone to near zero values (0.05 ppm) in these parts of the vortex. © 2021. The Authors.
英文关键词	climate change; ozone; ozone loss; stratosphere
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/236994
作者单位	Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany; NorthWest Research Associates, Socorro, NM, United States; New Mexico Institute of Mining and Technology, Socorro, NM, United States; Air Quality Research Division, Environment and Climate Change Canada, Downsview, ON, Canada; Danish Meteorological Institute, Copenhagen, Denmark; Space and Earth Observation Center, Finnish Meteorological Institute, Sodankylä, Finland; UK Met Office, Lerwick Observatory, Lerwick, United Kingdom
推荐引用方式 GB/T 7714	Wohltmann I.,von der Gathen P.,Lehmann R.,et al. Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters[J],2021,126(18).
APA	Wohltmann I..,von der Gathen P..,Lehmann R..,Deckelmann H..,Manney G.L..,...&Rex M..(2021).Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Wohltmann I.,et al."Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters".Journal of Geophysical Research: Atmospheres 126.18(2021).