气候变化领域集成服务门户(CCPortal): Technical note: Northern midlatitude baseline ozone - long-term changes and the COVID-19 impact

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DOI	10.5194/acp-22-13423-2022
	Technical note: Northern midlatitude baseline ozone - long-term changes and the COVID-19 impact
	Parrish, David D.; Derwent, Richard G.; Faloona, Ian C.; Mims, Charles A.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13423
结束页码	13430
卷号	22 期号:20 页码:8
英文摘要	A nonlinear change in baseline ozone concentrations at northern midlatitudes has been quantified over preceding decades. During the past few years, several studies, using linear trend analyses, report relatively small trends over selected time periods - results inconsistent with the earlier developed picture. We show that reported COVID-19-related ozone changes in the background troposphere based on the linear analysis are significantly larger than those derived considering recent long-term decreases in background ozone, which the linear trend analyses do not quantify. We further point out that the extensive loss of lower stratospheric ozone in the unprecedented 2020 springtime Arctic stratospheric ozone depletion event likely reduced the natural source to the troposphere, rendering the background anomalously low that year. Consideration of these two issues indicates that the COVID-19 restrictions had a much smaller impact on background tropospheric ozone in 2020 than previously reported. A consensus understanding of baseline ozone changes and their causes is important for formulating policies to improve ozone air quality; cooperative, international emission control efforts aimed at continuing or even accelerating the ongoing decrease in hemisphere-wide background ozone concentrations may be the most effective approach to further reducing urban and rural ozone in the more developed northern midlatitude countries, as well as improving ozone air quality in all countries within these latitudes. Analysis of baseline ozone measurements over several years following the COVID-19 impact is expected to provide a firm basis for resolving the inconsistencies between the two views of long-term northern midlatitude ozone changes and better quantifying the COVID-19 impact.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000869125200001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273848
作者单位	University of California System; University of California Davis; University of Toronto
推荐引用方式 GB/T 7714	Parrish, David D.,Derwent, Richard G.,Faloona, Ian C.,et al. Technical note: Northern midlatitude baseline ozone - long-term changes and the COVID-19 impact[J],2022,22(20):8.
APA	Parrish, David D.,Derwent, Richard G.,Faloona, Ian C.,&Mims, Charles A..(2022).Technical note: Northern midlatitude baseline ozone - long-term changes and the COVID-19 impact.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(20),8.
MLA	Parrish, David D.,et al."Technical note: Northern midlatitude baseline ozone - long-term changes and the COVID-19 impact".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.20(2022):8.