气候变化领域集成服务门户(CCPortal): Stratospheric contribution to the summertime high surface ozone events over the western united states

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DOI	10.1088/1748-9326/abba53
	Stratospheric contribution to the summertime high surface ozone events over the western united states
	Wang X.; Wu Y.; Randel W.; Tilmes S.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	The stratospheric influence on summertime high surface ozone (O3) events is examined using a twenty-year simulation from the Whole Atmosphere Community Climate Model. We find that O3 transported from the stratosphere makes a significant contribution to the surface O3 variability where background surface O3 exceeds the 95th percentile, especially over western U.S. Maximum covariance analysis is applied to O3 anomalies paired with stratospheric O3 tracer anomalies to identify the stratospheric intrusion and the underlying dynamical mechanism. The first leading mode corresponds to deep stratospheric intrusions in the western and northern tier of the U.S., and intensified northeasterlies in the mid-to-lower troposphere along the west coast, which also facilitate the transport to the eastern Pacific Ocean. The second leading mode corresponds to deep intrusions over the Intermountain Regions. Both modes are associated with eastward propagating baroclinic systems, which are amplified near the end of the North Pacific storm tracks, leading to strong descents over the western U.S. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	baroclinic waves; north pacific storm track; stratosphere-troposphere exchange; stratospheric intrusion
语种	英语
scopus关键词	Ozone; Dynamical mechanisms; Eastern pacific Ocean; Lower troposphere; Maximum covariance analysis; North Pacific; Surface ozone; Western United States; Whole atmosphere community climate models; Climate models; atmospheric chemistry; ozone; stratosphere; summer; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153575
作者单位	Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN, United States; Atmospheric Chemistry, Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Wang X.,Wu Y.,Randel W.,et al. Stratospheric contribution to the summertime high surface ozone events over the western united states[J],2020,15(10).
APA	Wang X.,Wu Y.,Randel W.,&Tilmes S..(2020).Stratospheric contribution to the summertime high surface ozone events over the western united states.Environmental Research Letters,15(10).
MLA	Wang X.,et al."Stratospheric contribution to the summertime high surface ozone events over the western united states".Environmental Research Letters 15.10(2020).