气候变化领域集成服务门户(CCPortal): Unprecedented Spring 2020 Ozone Depletion in the Context of 20 Years of Measurements at Eureka, Canada

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DOI	10.1029/2020JD034365
	Unprecedented Spring 2020 Ozone Depletion in the Context of 20 Years of Measurements at Eureka, Canada
	Bognar K.; Alwarda R.; Strong K.; Chipperfield M.P.; Dhomse S.S.; Drummond J.R.; Feng W.; Fioletov V.; Goutail F.; Herrera B.; Manney G.L.; McCullough E.M.; Millán L.F.; Pazmino A.; Walker K.A.; Wizenberg T.; Zhao X.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	In the winter and spring of 2019/2020, the unusually cold, strong, and stable polar vortex created favorable conditions for ozone depletion in the Arctic. Chemical ozone loss started earlier than in any previous year in the satellite era and continued until late March, resulting in the unprecedented reduction of the ozone column. The vortex was located above the Polar Environment Atmospheric Research Laboratory in Eureka, Canada (80°N, 86°W) from late February to the end of April, presenting an excellent opportunity to examine ozone loss from a single ground station. Measurements from a suite of instruments show that total column ozone was at an all-time low in the 20-year data set, 22–102 DU below previous records set in 2011. Ozone minima (<200 DU), enhanced OClO and BrO slant columns, and unusually low-HCl, ClONO2, and HNO3 columns were observed in March. Polar stratospheric clouds were present as late as 20 March, and ozonesondes show unprecedented depletion in the March and April profiles (to <0.2 ppmv). While both chemical and dynamical factors lead to reduced ozone when the vortex is cold, the contribution of chemical depletion (based on the variable correlation of ozone and temperature) was exceptional in spring 2020 when compared to typical Arctic winters. Mean chemical ozone loss over Eureka was estimated to be 111–126 DU (27%–31%) using April measurements and passive ozone from the SLIMCAT chemical transport model. While absolute ozone loss was generally smaller in 2020 than in 2011, percentage ozone loss was greater in 2020. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Arctic; Eureka; PEARL; stratospheric ozone depletion
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/185304
作者单位	Department of Physics, University of Toronto, Toronto, ON, Canada; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; National Centre for Earth Observation, University of Leeds, Leeds, United Kingdom; Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS, Canada; National Centre for Atmospheric Science, University of Leeds, Leeds, United Kingdom; Air Quality Research Division, Environment and Climate Change Canada, Toronto, ON, Canada; LATMOS/IPSL, UVSQ Université Paris-Saclay, Sorbonne Université, CNRS, Guyancourt, France; 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	Bognar K.,Alwarda R.,Strong K.,et al. Unprecedented Spring 2020 Ozone Depletion in the Context of 20 Years of Measurements at Eureka, Canada[J],2021,126(8).
APA	Bognar K..,Alwarda R..,Strong K..,Chipperfield M.P..,Dhomse S.S..,...&Zhao X..(2021).Unprecedented Spring 2020 Ozone Depletion in the Context of 20 Years of Measurements at Eureka, Canada.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Bognar K.,et al."Unprecedented Spring 2020 Ozone Depletion in the Context of 20 Years of Measurements at Eureka, Canada".Journal of Geophysical Research: Atmospheres 126.8(2021).