气候变化领域集成服务门户(CCPortal): Long-term variations in ozone levels in the troposphere and lower stratosphere over Beijing: Observations and model simulations

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DOI	10.5194/acp-20-13343-2020
	Long-term variations in ozone levels in the troposphere and lower stratosphere over Beijing: Observations and model simulations
	Zhang Y.; Tao M.; Zhang J.; Liu Y.; Chen H.; Cai Z.; Konopka P.
发表日期	2020
ISSN	1680-7316
起始页码	13343
结束页码	13354
卷号	20 期号:21
英文摘要	Tropospheric ozone is both a major pollutant and a short-lived greenhouse gas and has therefore caused much concern in recent years. The ozone profile in the troposphere and lower stratosphere over Beijing has been observed since 2002 by ozonesondes developed by the Institute of Atmospheric Physics. Increasing concentrations of tropospheric ozone from 2002 to 2010 measured by these balloon-based observations have been reported previously. As more observations are now available, we used these data to analyse the long-term variability of ozone over Beijing during the whole period from 2002 to 2018. The ozonesondes measured increasing concentrations of ozone from 2002 to 2012 in both the troposphere and lower stratosphere. There was a sudden decrease in observed ozone between 2011 and 2012. After this decrease, the increasing trend in ozone concentrations slowed down, especially in the mid-troposphere, where the positive trend became neutral. We used the Chemical Lagrangian Model of the Stratosphere (CLaMS) to determine the influence of the transport of ozone from the stratosphere to the troposphere on the observed ozone profiles. CLaMS showed a weak increase in the contribution of stratospheric ozone before the decrease in 2011-2012 and a much more pronounced decrease after this time. Because there is no tropospheric chemistry in CLaMS, the sudden decrease simulated by CLaMS indicates that a smaller downward transport of ozone from the stratosphere after 2012 may explain a significant part of the observed decrease in ozone in the mid-troposphere and lower stratosphere. However, the influence of stratospheric ozone in the lower troposphere is negligible in CLaMS, and the hiatus in the positive trend after 2012 can be attributed to a reduction in ozone precursors as a result of stronger pollution control measures in Beijing. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	atmospheric modeling; balloon observation; concentration (composition); long-term change; ozone; ozonesonde; stratosphere; troposphere; Beijing [China]; China
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/247392
作者单位	Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; IEK-7: Stratosphere, Forschungszentrum Jülich, Jülich, 52425, Germany
推荐引用方式 GB/T 7714	Zhang Y.,Tao M.,Zhang J.,et al. Long-term variations in ozone levels in the troposphere and lower stratosphere over Beijing: Observations and model simulations[J],2020,20(21).
APA	Zhang Y..,Tao M..,Zhang J..,Liu Y..,Chen H..,...&Konopka P..(2020).Long-term variations in ozone levels in the troposphere and lower stratosphere over Beijing: Observations and model simulations.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(21).
MLA	Zhang Y.,et al."Long-term variations in ozone levels in the troposphere and lower stratosphere over Beijing: Observations and model simulations".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.21(2020).