气候变化领域集成服务门户(CCPortal): Impact of Stratospheric Intrusions on Ozone Enhancement in the Lower Troposphere and Implication to Air Quality in Hong Kong and Other South China Regions

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DOI	10.1029/2020JD033955
	Impact of Stratospheric Intrusions on Ozone Enhancement in the Lower Troposphere and Implication to Air Quality in Hong Kong and Other South China Regions
	Zhao K.; Huang J.; Wu Y.; Yuan Z.; Wang Y.; Li Y.; Ma X.; Liu X.; Ma W.; Wang Y.; Zhang X.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	Stratospheric intrusions are an important source of ozone (O3) in the troposphere. In this study, 17 years of O3 sounding data from the Hong Kong Observatory with a weekly sampling frequency are analyzed to identify stratospheric intrusions and quantify their impact on O3 enhancement events in springtime from 2004 to 2020. 24.7% of O3 enhancement events are related to stratospheric intrusion whereas 31.7% of intrusions lead to the enhancement of O3 in the lower troposphere. Occurrences of stratospheric intrusion in springtime are closely related to tropopause folding and tropospheric convective activities in subtropical regions. The Weather Research and Forecasting model coupled with Chemistry simulations are conducted with the integrated process analysis to quantify the impact of stratospheric intrusions on the enhancement of O3 in the lower free troposphere as well as near the surface under different synoptic patterns. Synoptic patterns associated with stratospheric intrusion-driving O3 enhancements are classified into two categories: Saddle Point (“S”) and Cold Front (“F”). While downward transport of O3-enriched air from the enhancement layer exerts an important impact on surface O3 for synoptic pattern “S,” the impact on surface O3 is limited for surface pattern “F.” The impact of stratospheric intrusions together with entrainment on surface O3 may have a strong indication on the development of effective emission control strategies on surface O3 reduction in Hong Kong. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Hong Kong; ozone; stratospheric intrusion; subtropical jet stream; WRF/Chem
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/236999
作者单位	School of Environment and Energy, South China University of Technology, Guangzhou, China; Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, Nanjing, China; I.M. System Group, Environmental Modeling Center, NOAA National Centers for Environmental Prediction, College Park, MD, United States; Center for Spatial Information Science and Systems, College of Science, George Mason University, Fairfax, VA, United States; The City College of New York and NOAA-CREST, New York, NY, United States; Climate, Environment and Sustainability Center, Nanjing University of Information Science and Technology, Nanjing, China; Southern University of Science and Technology, ShenZhen, China; Xianyang Meteorological Bureau, Xianyang, China
推荐引用方式 GB/T 7714	Zhao K.,Huang J.,Wu Y.,et al. Impact of Stratospheric Intrusions on Ozone Enhancement in the Lower Troposphere and Implication to Air Quality in Hong Kong and Other South China Regions[J],2021,126(18).
APA	Zhao K..,Huang J..,Wu Y..,Yuan Z..,Wang Y..,...&Zhang X..(2021).Impact of Stratospheric Intrusions on Ozone Enhancement in the Lower Troposphere and Implication to Air Quality in Hong Kong and Other South China Regions.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Zhao K.,et al."Impact of Stratospheric Intrusions on Ozone Enhancement in the Lower Troposphere and Implication to Air Quality in Hong Kong and Other South China Regions".Journal of Geophysical Research: Atmospheres 126.18(2021).