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DOI	10.5194/acp-20-9883-2020
	Aerosol concentrations variability over China: Two distinct leading modes
	Feng J.; Zhu J.; Li J.; Liao H.
发表日期	2020
ISSN	1680-7316
起始页码	9883
结束页码	9893
卷号	20 期号:16
英文摘要	Understanding the variability in aerosol concentrations (ACs) over China is a scientific challenge and is of practical importance. The present study explored the month-to-month variability in ACs over China based on simulations of an atmospheric chemical transport model with a fixed emissions level. The month-to-month variability in ACs over China is dominated by two principal modes: the first leading monopole mode and the second meridional dipole mode. The monopole mode mainly indicates enhanced ACs over eastern China, and the dipole mode displays a south-north out-of-phase pattern. The two leading modes are associated with different climatic systems. The monopole mode relates to the 3 months leading the El Niño-Southern Oscillation (ENSO), while the dipole mode connects with the simultaneous variation in the North Atlantic Oscillation (NAO) or the Northern Hemisphere Annular Mode (NAM). The associated anomalous dynamic and thermal impacts of the two climatic variabilities are examined to explain their contributions to the formation of the two modes. For the monopole mode, the preceding ENSO is associated with anomalous convergence, decreased planetary boundary layer height (PBLH), and negative temperature anomalies over eastern China, which are unfavorable for emissions. For the dipole mode, the positive NAO is accompanied by opposite anomalies in the convergence, PBLH, and temperature over southern and northern China, INNC0828A202045005242of the mode. This result suggests that the variations originating from the tropical Pacific and extratropical atmospheric systems contribute to the dominant variabilities of ACs over China. © Author(s) 2020.
语种	英语
scopus关键词	aerosol; aerosol composition; atmospheric chemistry; atmospheric modeling; climate variation; computer simulation; concentration (composition); El Nino-Southern Oscillation; North Atlantic Oscillation; Northern Hemisphere; temporal variation; China; Pacific Ocean; Pacific Ocean (Tropical)
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/141141
作者单位	College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Foreign Economic Cooperation Office, Ministry of Ecology and Environment, Beijing, China; Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES), Key Laboratory of Physical Oceanography, Institute for Advanced Ocean Studies, Ocean University of China, Qingdao, 266100, China; Laboratory for Ocean Dynamics and Climate, Pilot Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, 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 and Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Feng J.,Zhu J.,Li J.,et al. Aerosol concentrations variability over China: Two distinct leading modes[J],2020,20(16).
APA	Feng J.,Zhu J.,Li J.,&Liao H..(2020).Aerosol concentrations variability over China: Two distinct leading modes.Atmospheric Chemistry and Physics,20(16).
MLA	Feng J.,et al."Aerosol concentrations variability over China: Two distinct leading modes".Atmospheric Chemistry and Physics 20.16(2020).