气候变化领域集成服务门户(CCPortal): Comparison of the influence of two types of cold surge on haze dispersion in eastern China

CCPortal

DOI	10.5194/acp-21-15185-2021
	Comparison of the influence of two types of cold surge on haze dispersion in eastern China
	Zhang S.; Zeng G.; Yang X.; Wu R.; Yin Z.
发表日期	2021
ISSN	1680-7316
起始页码	15185
结束页码	15197
卷号	21 期号:19
英文摘要	Cold surge (CS) is considered a favorable weather process to improve air quality and is widely recognized. However, there is no detailed study on the differences in the dispersion ability of different types of CSs in relation to haze days in eastern China (HDEC). This paper uses the hierarchical clustering algorithm to classify the cool-season (November to February of the following year) CSs across eastern China into blocking CSs and wave-Train CSs and compares their influences on the number of HDEC from 1980 to 2017. Results show that the wave-Train CSs can significantly improve the visibility in eastern China and generally improve air quality for about 2ĝ€¯d longer than the blocking CSs, which indicates that the blocking CSs have a weaker ability to dissipate HDEC compared with the wave-Train CSs. The CSs affect the HDEC by changing meteorological elements like thermal inversion potential, horizontal surface wind, sea level pressure (SLP), and surface air temperature (SAT). A period of 4ĝ€¯d after the outbreak of CSs, the variations of thermal inversion potential and horizontal surface wind of two types of CSs tend to be consistent. However, the negative SAT anomalies and the positive SLP anomalies caused by the blocking CSs lasted shorter than those caused by the wave-Train CSs, forming favorable conditions for the rapid growth of HDEC. Furthermore, results show that in recent years, especially after the 1990s, the frequency of wave-Train CSs has decreased significantly, while the frequency of blocking CSs has slightly increased, indicating that the overall ability of CSs to dissipate HDEC has weakened in general. This work may provide reference for the future formulation of haze control policies in East Asia. © Copyright:
语种	英语
scopus关键词	air quality; algorithm; atmospheric blocking; cold air; comparative study; dispersion; haze; surface wind; 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/246509
作者单位	Key Laboratory of Meteorological Disaster, Min. of Educ./Jt. Intl. Res. Lab. of Climate and Environ. Change /Collab. Innov. Ctr. on Forecast and Eval. of Meteorol. Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Meteorological Bureau of Jiading District, Shanghai, 201815, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519080, China
推荐引用方式 GB/T 7714	Zhang S.,Zeng G.,Yang X.,et al. Comparison of the influence of two types of cold surge on haze dispersion in eastern China[J],2021,21(19).
APA	Zhang S.,Zeng G.,Yang X.,Wu R.,&Yin Z..(2021).Comparison of the influence of two types of cold surge on haze dispersion in eastern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Zhang S.,et al."Comparison of the influence of two types of cold surge on haze dispersion in eastern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).