气候变化领域集成服务门户(CCPortal): The role of chemical processes in the quasi-biennial oscillation (QBO) signal in stratospheric ozone

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DOI	10.1016/j.atmosenv.2020.117906
	The role of chemical processes in the quasi-biennial oscillation (QBO) signal in stratospheric ozone
	Zhang J.; Zhang C.; Zhang K.; Xu M.; Duan J.; Chipperfield M.P.; Feng W.; Zhao S.; Xie F.
发表日期	2021
ISSN	13522310
卷号	244
英文摘要	The stratospheric quasi-biennial oscillation (QBO) is known to cause variations in the transport of chemical tracers but the role of chemical processes in modulating their QBO signals remains unclear. Using ozone observations (Stratospheric Water and OzOne Satellite Homogenized, SWOOSH) and a chemical transport model (SLIMCAT), we analyze the role of chemical processes in the QBO impact on stratospheric ozone in the tropics and Northern Hemisphere during winter and early spring over the period 1979–2015. During easterly QBO (EQBO) phases tropical ozone concentrations decrease in the lower stratosphere (40–100 hPa, ~16–23 km) and middle stratosphere (above 15 hPa, ~30 km) but increase in the transition region between 15 and 40 hPa (~23–30 km) compared to westerly (WQBO) phases. Although the contributions of chemical processes to the ozone QBO signal are less than those of dynamical processes, this study highlights their non-negligible role. The negative chemical ozone tendencies in the tropical lower stratosphere, that are attributed to less downward ultraviolet radiation and weaker oxygen photolysis, partially contribute to the negative ozone anomalies at this altitude during EQBO phases, particularly in February and March. In contrast, the negative chemical ozone tendencies related to increased NO2 and stronger NO2-catalyzed ozone loss, which are important in the middle stratosphere, cannot explain the ozone increases in the transition region during EQBO phases, which is mainly caused by the QBO-induced transport of ozone-rich air from above. The positive chemical ozone tendencies in the extratropics during EQBO phases are mainly related to lower temperatures and less active catalytic ozone loss cycles. In addition, reduction in polar stratospheric cloud occurrence associated with the warmer Arctic stratosphere during EQBO phases weakens the heterogeneous chemical processes in the lower stratosphere and decreases chlorine activation, partially contributing to the positive chemical ozone tendency and ozone increases in this region. © 2020 Elsevier Ltd
英文关键词	Quasi-biennial oscillation; Stratospheric ozone
语种	英语
scopus关键词	Atmospheric chemistry; Chemical analysis; Nitrogen oxides; Oscillators (mechanical); Ozone layer; Photolysis; Tropics; Chemical transport models; Chlorine activation; Lower temperatures; Northern Hemispheres; Ozone concentration; Polar stratospheric clouds; Quasi-biennial oscillation; Stratospheric ozone; Ozone; ozone; activation energy; atmospheric transport; catalysis; Northern Hemisphere; ozone; polar stratospheric cloud; quasi-biennial oscillation; stratosphere; tracer; ultraviolet radiation; westerly; Article; chemical reaction; cloud; controlled study; environmental temperature; gas; latitude; longitude; Northern Hemisphere; oscillation; ozone layer; photolysis; priority journal; quasi biennial oscillation; signal processing; stratosphere; tropics; ultraviolet radiation; winter; Arctic
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144880
作者单位	Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, China; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, United Kingdom; National Centre for Earth Observation, University of Leeds, Leeds, United Kingdom; National Centre for Atmospheric Science (NCAS), University of Leeds, Leeds, United Kingdom; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China
推荐引用方式 GB/T 7714	Zhang J.,Zhang C.,Zhang K.,et al. The role of chemical processes in the quasi-biennial oscillation (QBO) signal in stratospheric ozone[J],2021,244.
APA	Zhang J..,Zhang C..,Zhang K..,Xu M..,Duan J..,...&Xie F..(2021).The role of chemical processes in the quasi-biennial oscillation (QBO) signal in stratospheric ozone.Atmospheric Environment,244.
MLA	Zhang J.,et al."The role of chemical processes in the quasi-biennial oscillation (QBO) signal in stratospheric ozone".Atmospheric Environment 244(2021).