气候变化领域集成服务门户(CCPortal): How secondary inorganic aerosols from Delhi influence aerosol optical and radiative properties at a downwind sub-urban site over Indo-Gangetic Basin?

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DOI	10.1016/j.atmosenv.2021.118246
	How secondary inorganic aerosols from Delhi influence aerosol optical and radiative properties at a downwind sub-urban site over Indo-Gangetic Basin?
	Srivastava A.K.; Thomas A.; Hooda R.K.; Kanawade V.P.; Hyvärinen A.-P.; Bisht D.S.; Tiwari S.
发表日期	2021
ISSN	1352-2310
卷号	248
英文摘要	The particulate matters less than 10 μm sizes (PM10) were measured at a highly polluted urban environment of Delhi, and simultaneously at a downwind semi-urban site, Gual Pahari, in the north-west Indo-Gangetic Basin (IGB). The measurements were conducted during January–December 2008 to compare and contrast aerosol emissions, compositions and related optical and radiative properties for two different environments. While the total PM10 was about 30% lower at Gual Pahari as compared to Delhi, the total mass of water-soluble inorganic species (WSIs) was significantly enhanced (~23%) at Gual Pahari. Amongst WSIs, the major secondary inorganic species (SIs) were about 52% higher at Gual Pahari as compared to Delhi, with elevated levels in the post-monsoon/winter seasons. In contrast, the major crustal species were about 76% higher at Delhi as compared to Gual Pahari, with elevated levels in the summer/monsoon seasons. This indicates a strong inter-seasonal spatial variability in aerosol sources and compositions at these sites. Further, the simulations using aerosol optical model had resulted mean absorption coefficient (babs) and single scattering albedo (SSA) higher by about 50% and lower by about 18%, respectively, at Delhi (babs, 147 ± 63 M m−1 and SSA, 0.65 ± 0.12) as compared to Gual Pahari (babs, 73 ± 26 M m−1 and SSA, 0.79 ± 0.07). This reveals relative abundance of absorbing particles at Delhi compared to Gual Pahari. As a result, the estimated mean atmospheric forcing was 91 ± 23 W m−2 at Delhi, which was ~55% higher as compared to Gual Pahari. This is further corroborated with observed higher heating rate at Delhi (2.5 ± 0.7 K day−1) as compared to Gual Pahari (1.1 ± 0.4 K day−1). Our results highlight that diverse near-surface emissions together with atmospheric processing leads to strong inter-seasonal spatial heterogeneity in aerosol chemical, optical and radiative properties between the adjacent distinct sites. This has an important implication for a city-scale air pollution modeling. © 2021 Elsevier Ltd
关键词	Crustal ions Indo-Gangetic basin Radiative effects Secondary inorganic aerosol Urban emissions
语种	英语
scopus关键词	Aerosols; Air pollution; Atmospheric chemistry; Heat radiation; Absorbing particles; Air Pollution Modeling; Atmospheric forcing; Indo-Gangetic basin; Radiative properties; Secondary inorganic aerosol; Single scattering albedo; Spatial heterogeneity; Urban growth; inorganic compound; absorption coefficient; aerosol; albedo; atmospheric forcing; atmospheric pollution; heterogeneity; numerical model; radiative forcing; absorption; aerosol; albedo; Article; atmospheric pressure; chemical composition; combustion; comparative study; controlled study; India; lake basin; meteorology; optics; particulate matter; priority journal; radiative forcing; rainy season; seasonal variation; suburban area; suspended particulate matter; urban area; water solubility; winter; Delhi; Gangetic Plain; India
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/248559
作者单位	Indian Institute of Tropical Meteorology, Ministry of Earth Sciences, New Delhi, India; Finnish Meteorological Institute, Helsinki, Finland; Centre for Earth, Ocean and Atmospheric Sciences, University of Hyderabad, Hyderabad, India
推荐引用方式 GB/T 7714	Srivastava A.K.,Thomas A.,Hooda R.K.,et al. How secondary inorganic aerosols from Delhi influence aerosol optical and radiative properties at a downwind sub-urban site over Indo-Gangetic Basin?[J],2021,248.
APA	Srivastava A.K..,Thomas A..,Hooda R.K..,Kanawade V.P..,Hyvärinen A.-P..,...&Tiwari S..(2021).How secondary inorganic aerosols from Delhi influence aerosol optical and radiative properties at a downwind sub-urban site over Indo-Gangetic Basin?.ATMOSPHERIC ENVIRONMENT,248.
MLA	Srivastava A.K.,et al."How secondary inorganic aerosols from Delhi influence aerosol optical and radiative properties at a downwind sub-urban site over Indo-Gangetic Basin?".ATMOSPHERIC ENVIRONMENT 248(2021).