气候变化领域集成服务门户(CCPortal): Long-term trends and variations in haze-related weather conditions in north China during 1980–2018 based on emission-weighted stagnation intensity

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DOI	10.1016/j.atmosenv.2020.117830
	Long-term trends and variations in haze-related weather conditions in north China during 1980–2018 based on emission-weighted stagnation intensity
	Feng J.; Liao H.; Li Y.; Zhang Z.; Tang Y.
发表日期	2020
ISSN	1352-2310
卷号	240
英文摘要	Recently, climatological and environmental researchers have paid significant attention to the long-term trends and variations in haze-related weather conditions in North China (NC). This study investigates this topic using a quantified air stagnation index (ASIE) that combines stagnation intensity with fixed emission information, given that haze occurrence depends strongly on the rate of emission. ASIE has a close spatial and temporal relationship with observed PM2.5 concentrations, and a strong sensitivity to haze occurrence in NC. The annual ASIE increased by 18.2% over the period 1980–2018 due to significant decreases in planetary boundary layer height and ventilation. However, there was an apparent drop during 2013–2018, which suggests that lower stagnation intensity may take effect on the improved air quality in NC reported in recent years. Such low-frequency oscillation occurred twice during 1980–2018. Hence, if the current trend of decreasing stagnation intensity reverses, haze events may become more common in the future. In addition, the interannual variations in stagnation intensity were very significant. The percentage change of ASIE was as high as 50%–70% in some years. Finally, using the year-to-year growth ratio of ASIE, we highlight the difficulty of the “clean air challenge” due to the variations in stagnation in NC. The results suggest that the enforcement of the emission reduction plan should be tailored according to the stagnation conditions in the region and period of interest. © 2020 Elsevier Ltd
关键词	Haze North China Stagnation
语种	英语
scopus关键词	Air quality; Boundary layer flow; Boundary layers; Emission control; Emission reduction; Interannual variation; Long-term trend; Low frequency oscillations; North China; Planetary boundary layers; PM2.5 concentration; Temporal relationships; Meteorology; air quality; boundary layer; climate conditions; climate variation; emission control; haze; long-term change; air quality; article; boundary layer; China; haze; oscillation; quantitative analysis; China
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248987
作者单位	Institute of Urban Meteorology (IUM), China Meteorological Administration (CMA), Beijing, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics (IAP), Chinese Academy of Science (CAS), Beijing, China; Tianjin Environmental Meteorological Center, Tianjin, 300074, China
推荐引用方式 GB/T 7714	Feng J.,Liao H.,Li Y.,等. Long-term trends and variations in haze-related weather conditions in north China during 1980–2018 based on emission-weighted stagnation intensity[J],2020,240.
APA	Feng J.,Liao H.,Li Y.,Zhang Z.,&Tang Y..(2020).Long-term trends and variations in haze-related weather conditions in north China during 1980–2018 based on emission-weighted stagnation intensity.ATMOSPHERIC ENVIRONMENT,240.
MLA	Feng J.,et al."Long-term trends and variations in haze-related weather conditions in north China during 1980–2018 based on emission-weighted stagnation intensity".ATMOSPHERIC ENVIRONMENT 240(2020).