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DOI	10.1007/s12040-018-1064-7
	Investigating daytime and night-time differences with the seasonal trend and sources of inorganic fine aerosols in Indo-Gangetic plain
	Chandra, S.1,3; Kulshrestha, M. J.1; Kumar, B.2; Kotnala, R. K.1
通讯作者	Kulshrestha, M. J.
来源期刊	JOURNAL OF EARTH SYSTEM SCIENCE
ISSN	2347-4327
EISSN	0973-774X
出版年	2019
卷号	128 期号:2
英文摘要	This study investigates the seasonal distribution of inorganic aerosols in Central New Delhi and identifies their potential source regions using concentration weighted trajectories (CWTs). Secondary inorganic aerosols (NO3-, SO42-, NH4+) are the largest contributors to fine particulate matter in New Delhi, India. The concentrations of secondary inorganic aerosols showed very distinct seasonal patterns with higher concentrations in winter and post-monsoon seasons. Inorganic ions Ca2+, Mg2+ and K+ were also examined to understand their temporal trends. The primary aerosols were found to have smaller diurnal differences than secondary aerosols. The higher coefficient of divergence for secondary aerosols indicated a significant difference in their chemistry and/or meteorology during daytime and night-time, respectively. The backward trajectory analysis revealed the advection of ionic species from distant sources responsible for their significant seasonality. The highest concentrations of K+ during the post-monsoon season were mainly influenced by air masses arriving from Punjab and Haryana regions resulting from the prominent agricultural crop residue burning in these areas. CWT also identified the Thar Desert and Punjab as potential regions for enhanced levels of Ca2+ and K+, respectively. Also, the brick kilns located in western UP were observed as the major potential sources for NO3- and SO42-.
英文关键词	PM2.5 water-soluble inorganic species secondary aerosols coefficient of divergence concentration weighted trajectory
类型	Article
语种	英语
国家	India
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000457498100004
WOS关键词	PARTICULATE AIR-POLLUTION ; WATER-SOLUBLE COMPONENTS ; CHEMICAL-COMPOSITION ; SOURCE IDENTIFICATION ; CARBONACEOUS AEROSOLS ; ATMOSPHERIC AEROSOLS ; TRAJECTORY ANALYSIS ; URBAN-ENVIRONMENT ; PM2.5 ; VARIABILITY
WOS类目	Geosciences, Multidisciplinary ; Multidisciplinary Sciences
WOS研究方向	Geology ; Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216917
作者单位	1.CSIR, Natl Phys Lab, New Delhi 110012, India; 2.Jawaharlal Nehru Univ, New Delhi 110067, India; 3.Univ Delhi, Vivekananda Coll, Delhi 110095, India
推荐引用方式 GB/T 7714	Chandra, S.,Kulshrestha, M. J.,Kumar, B.,et al. Investigating daytime and night-time differences with the seasonal trend and sources of inorganic fine aerosols in Indo-Gangetic plain[J],2019,128(2).
APA	Chandra, S.,Kulshrestha, M. J.,Kumar, B.,&Kotnala, R. K..(2019).Investigating daytime and night-time differences with the seasonal trend and sources of inorganic fine aerosols in Indo-Gangetic plain.JOURNAL OF EARTH SYSTEM SCIENCE,128(2).
MLA	Chandra, S.,et al."Investigating daytime and night-time differences with the seasonal trend and sources of inorganic fine aerosols in Indo-Gangetic plain".JOURNAL OF EARTH SYSTEM SCIENCE 128.2(2019).