气候变化领域集成服务门户(CCPortal): Seesaw haze pollution in North China modulated by the sub-seasonal variability of atmospheric circulation

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DOI	10.5194/acp-19-565-2019
	Seesaw haze pollution in North China modulated by the sub-seasonal variability of atmospheric circulation
	Zhang G.; Gao Y.; Cai W.; Leung L.R.; Wang S.; Zhao B.; Wang M.; Shan H.; Yao X.; Gao H.
发表日期	2019
ISSN	16807316
起始页码	565
结束页码	576
卷号	19 期号:1
英文摘要	Utilizing a recent observational dataset of particulate matter with diameters less than 2.5 μm (PM 2.5 ) in North China, this study reveals a distinct seesaw feature of abnormally high and low PM 2.5 concentrations in the adjacent two months of December 2015 and January 2016, accompanied by distinct meteorological modulations. The seesaw pattern is postulated to be linked to a super El Niño and the Arctic Oscillation (AO). During the mature phase of El Niño in December 2015, the weakened East Asian winter monsoon (EAWM) and the associated low-level southerly wind anomaly reduced planetary boundary layer (PBL) height, favoring strong haze formation. This circulation pattern was completely reversed in the following month, in part due to a sudden phase change of the AO from positive to negative and the beginning of a decay of the El Niño, which enhanced the southward shift of the upper tropospheric jet from December to January relative to climatology, leading to an enhanced EAWM and substantially lower haze formation. This sub-seasonal change in circulation is also robustly found in 1982-1983 and 1997-1998, implicative of a general physical mechanism dynamically linked to El Niño and the AO. Numerical experiments using the Weather Research and Forecasting (WRF) Community Multiscale Air Quality (CMAQ) model were used to test the modulation of the meteorological conditions on haze formation. With the same emission, simulations for three super El Niño periods (1983, 1997 and 2015) robustly show higher PM 2.5 concentrations under the mature phase of the super El Niño, but substantially lower PM 2.5 concentrations during the decay phase of El Niño (and the sudden AO phase change), further verifying the modulation effect of the sub-seasonal circulation anomaly on PM 2.5 concentrations in North China. © 2019 Author(s).
语种	英语
scopus关键词	Arctic Oscillation; atmospheric circulation; atmospheric pollution; concentration (composition); El Nino; haze; particulate matter; seasonal variation; China
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/144720
作者单位	Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China; Physical Oceanography Laboratory, CIMST, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266100, China; CSIRO Marine and Atmospheric Research, Aspendale, VIC 3195, Australia; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99354, United States; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; Joint Institute for Regional Earth System Science and Engineering, Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA 90095, United States; School of Atmospheric Sciences, Nanjing University, Nanjing, 210023, China
推荐引用方式 GB/T 7714	Zhang G.,Gao Y.,Cai W.,et al. Seesaw haze pollution in North China modulated by the sub-seasonal variability of atmospheric circulation[J],2019,19(1).
APA	Zhang G..,Gao Y..,Cai W..,Leung L.R..,Wang S..,...&Gao H..(2019).Seesaw haze pollution in North China modulated by the sub-seasonal variability of atmospheric circulation.Atmospheric Chemistry and Physics,19(1).
MLA	Zhang G.,et al."Seesaw haze pollution in North China modulated by the sub-seasonal variability of atmospheric circulation".Atmospheric Chemistry and Physics 19.1(2019).