气候变化领域集成服务门户(CCPortal): Appreciable role of stratospheric polar vortex in the abnormal diffusion of air pollutant in North China in 2015/2016 winter and implications for prediction

CCPortal

DOI	10.1016/j.atmosenv.2021.118549
	Appreciable role of stratospheric polar vortex in the abnormal diffusion of air pollutant in North China in 2015/2016 winter and implications for prediction
	Huang W.; Yu Y.; Yin Z.; Chen H.; Gao M.
发表日期	2021
ISSN	1352-2310
卷号	259
英文摘要	The longer predictability limit and downward impact on the extratropical circulations and weather have made the winter Stratospheric Polar Vortex (SPV) variability a new source for sub-seasonal prediction in extratropical wintertime. Using the PM2.5 observation data and high-resolution ERA5 reanalysis data during 2014–2019, we investigate the characteristics of SPV and its linkage to the tropospheric meteorological condition during the abnormal PM2.5 diffusion event in North China in 2015/2016 winter. Results show that this diffusion event includes two stages: rapid diffusion stage (December 22–28, 2015) and persistent diffusion stage (January 1–23, 2016). The tropospheric meteorological condition in both stages was characterized by enhanced northerlies over North China, which dominantly led to the anomalous PM2.5 concentration drop. An active coupling process between SPV and surface Arctic Oscillation (AO) is found at the persistent diffusion stage, rather than at the rapid diffusion stage. The amplified tropospheric waves associated with the negative AO in the end of December propagated upward and helped split the SPV into two sub-vortices respectively over North Atlantic and North Asia in the beginning of January; the SPV weakening signal then propagated downward, helping intensify the negative AO since January 11, which further strengthened the northerly as well as PM2.5 diffusion over the entire East Asia. This case study demonstrates that the stratosphere-troposphere coupling effectively favors and extend the duration of PM2.5 diffusion, and the weakening of SPV provides a long lead information (1–2 weeks) to the meteorological diffusion condition, thus showing appreciable potential for extending the predictability limit of meteorological diffusion condition in North China. © 2021 Elsevier Ltd
关键词	Meteorological diffusion condition for air pollutants North China Stratosphere-troposphere interaction Stratospheric polar vortex
语种	英语
scopus关键词	Air pollution; Diffusion; Vortex flow; Arctic Oscillation; Condition; Meteorological condition; Meteorological diffusion condition for air pollutant; North China; PM$-2.5$; Predictability limit; Rapid diffusion; Stratosphere-troposphere interaction; Stratospheric polar vortex; Troposphere; Arctic Oscillation; atmospheric pollution; meteorology; polar vortex; seasonal variation; stratosphere-troposphere interaction; troposphere; article; China; diffusion; meteorology; North Atlantic oscillation; particulate matter 2.5; prediction; stratosphere; troposphere; winter; Arctic; Atlantic Ocean; Atlantic Ocean (North); 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/248355
作者单位	Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC–FEMD), Nanjing University of Information Science and Technology, Nanjing, China; NUIST–UoR International Research Institute, Nanjing University of Information Science and Technology, Nanjing, China; Department of Geography, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China
推荐引用方式 GB/T 7714	Huang W.,Yu Y.,Yin Z.,et al. Appreciable role of stratospheric polar vortex in the abnormal diffusion of air pollutant in North China in 2015/2016 winter and implications for prediction[J],2021,259.
APA	Huang W.,Yu Y.,Yin Z.,Chen H.,&Gao M..(2021).Appreciable role of stratospheric polar vortex in the abnormal diffusion of air pollutant in North China in 2015/2016 winter and implications for prediction.ATMOSPHERIC ENVIRONMENT,259.
MLA	Huang W.,et al."Appreciable role of stratospheric polar vortex in the abnormal diffusion of air pollutant in North China in 2015/2016 winter and implications for prediction".ATMOSPHERIC ENVIRONMENT 259(2021).