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DOI	10.1016/j.atmosres.2021.105865
	Effect of aerosol types from various sources at an urban location on spectral curvature of scattering and absorption coefficients
	Kaskaoutis, D. G.; Grivas, G.; Stavroulas, I; Liakakou, E.; Dumka, U. C.; Gerasopoulos, E.; Mihalopoulos, N.
通讯作者	Kaskaoutis, DG (corresponding author), Natl Observ Athens, Inst Environm Res & Sustainable Dev, Athens 15236, Greece.
来源期刊	ATMOSPHERIC RESEARCH
ISSN	0169-8095
EISSN	1873-2895
出版年	2021
卷号	264
英文摘要	This study analyzes the spectral characteristics of in situ measured aerosol properties, namely scattering, absorption and single scattering albedo (SSA), explicitly examining the curvature characteristics of their wavelength dependence. Measurements were performed at an urban background site in Athens, Greece, during December 2017 and March 2018 characterized by contrasting aerosol sources and types, i.e. residential wood burning (RWB) and desert dust, respectively, which modulate the urban conditions, that are typically dominated by fossil-fuel combustion. Aerosol types were classified via the Scattering angstrom ngstrom Exponent (SAE) vs. Absorption Angstrom Exponent (AAE) matrix, with the black carbon (BC)-dominated type displaying the highest fraction (similar to 40%) in both periods. The spectral optical properties were examined for each aerosol type and month, revealing notable differences, which are closely linked to the contrasting emission sources, atmospheric dynamics and mixing processes. BC from fossil-fuel emissions and regional background aerosols mostly presented similar characteristics in both months. Emphasis was given on the spectral curvature effect, since the different aerosol types display notable changes in the spectral dependence of scattering and absorption in logarithmic coordinates. The enhanced presence of brown carbon resulted in negative curvature for scattering (concave curves) and highly positive for absorption (convex curves), while the presence of BC was mostly translated in a better fit of the angstrom ngstrom formula and small curvature effects. Intense dust events resulted in positive curvature for absorption and mostly negative for scattering. A scatterplot between the wavelength dependence of SSA and the scattering curvature may further differentiate key aerosol types i.e. BC, brown carbon and dust. This study highlights the curvature effects of the scattering, absorption and SSA, which have not been adequately addressed yet. The approach provides new insights in the differentiation of source-related aerosol types, although more analysis is needed to examine if findings are reproduced in other environments.
英文关键词	Single scattering albedo Absorption Angstrom exponent Scattering Angstrom exponent Brown carbon Black carbon Dust
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000707033800002
WOS关键词	INDO-GANGETIC PLAIN ; BROWN CARBON ; OPTICAL-PROPERTIES ; LIGHT-ABSORPTION ; BLACK CARBON ; WAVELENGTH DEPENDENCE ; ABSORBING AEROSOL ; CHEMICAL-COMPOSITION ; RADIATIVE PROPERTIES ; ATMOSPHERIC AEROSOL
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362675
作者单位	[Kaskaoutis, D. G.; Grivas, G.; Stavroulas, I; Liakakou, E.; Gerasopoulos, E.; Mihalopoulos, N.] Natl Observ Athens, Inst Environm Res & Sustainable Dev, Athens 15236, Greece; [Kaskaoutis, D. G.; Mihalopoulos, N.] Univ Crete, Dept Chem, Environm Chem Proc Lab, Iraklion 70013, Greece; [Dumka, U. C.] Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263001, India
推荐引用方式 GB/T 7714	Kaskaoutis, D. G.,Grivas, G.,Stavroulas, I,et al. Effect of aerosol types from various sources at an urban location on spectral curvature of scattering and absorption coefficients[J],2021,264.
APA	Kaskaoutis, D. G..,Grivas, G..,Stavroulas, I.,Liakakou, E..,Dumka, U. C..,...&Mihalopoulos, N..(2021).Effect of aerosol types from various sources at an urban location on spectral curvature of scattering and absorption coefficients.ATMOSPHERIC RESEARCH,264.
MLA	Kaskaoutis, D. G.,et al."Effect of aerosol types from various sources at an urban location on spectral curvature of scattering and absorption coefficients".ATMOSPHERIC RESEARCH 264(2021).