气候变化领域集成服务门户(CCPortal): Possible influence of sudden stratospheric warmings on the atmospheric environment in the Beijing-Tianjin-Hebei region

CCPortal

DOI	10.5194/acp-22-13087-2022
	Possible influence of sudden stratospheric warmings on the atmospheric environment in the Beijing-Tianjin-Hebei region
	Lu, Qian; Rao, Jian; Shi, Chunhua; Guo, Dong; Fu, Guiqin; Wang, Ji; Liang, Zhuoqi
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13087
结束页码	13102
卷号	22 期号:19 页码:16
英文摘要	Using European Centre for Medium-Range Weather Forecasts fifth-generation (ERA5) and second Modern-Era Retrospective analysis for Research and Applications (MERRA-2) reanalysis and surface meteorological observation data, this study explores the possible impact of sudden stratospheric warming (SSW) events on air quality in the Beijing-Tianjin-Hebei (BTH) region. Major SSW events are divided into polar vortex displacement SSW and polar vortex split SSW. As the duration of split SSW events is longer and the stratospheric signal pulses propagate further downward than displacement SSWs, subseasonal variability of the atmospheric particulates in the BTH is larger during split SSWs. The air particulate concentration is light before the SSW onset due to the enhanced perturbation in the troposphere associated with strengthened planetary waves. The air particulate concentration around the SSW onset dates begins to rise due to weakening of the tropospheric disturbance as the enhanced planetary waves enter the stratosphere. In the decaying period of the SSW, the air particulate concentration decreases as the stratospheric negative northern annular mode (NAM) signal propagates downward. Specifically, in the pre-SSW period of displacement (split) SSW events, a wavenumber-1-like (wavenumber-2-like) anomaly pattern is strengthened. The East Asian winter monsoon intensifies as the East Asian trough is deepened, especially before the split SSW event onset, leading to a cleaning period. Around the SSW onset period as the tropospheric perturbation diminishes and the East Asian winter monsoon weakens, a surge of air particulate concentration is observed. After the SSW onset, due to the downward propagation of the stratospheric negative NAM signal, cold anomalies form in northeastern East Asia, especially for split SSWs, corresponding to a cleaning period in the BHT region. The local meteorological conditions during the SSWs are also discussed.
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:000865951800001
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/273069
作者单位	Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Lu, Qian,Rao, Jian,Shi, Chunhua,et al. Possible influence of sudden stratospheric warmings on the atmospheric environment in the Beijing-Tianjin-Hebei region[J],2022,22(19):16.
APA	Lu, Qian.,Rao, Jian.,Shi, Chunhua.,Guo, Dong.,Fu, Guiqin.,...&Liang, Zhuoqi.(2022).Possible influence of sudden stratospheric warmings on the atmospheric environment in the Beijing-Tianjin-Hebei region.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(19),16.
MLA	Lu, Qian,et al."Possible influence of sudden stratospheric warmings on the atmospheric environment in the Beijing-Tianjin-Hebei region".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.19(2022):16.