气候变化领域集成服务门户(CCPortal): Climatological aspects of size-resolved column aerosol optical properties over a rural site in the southern peninsular India

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DOI	10.1016/j.atmosres.2020.105345
	Climatological aspects of size-resolved column aerosol optical properties over a rural site in the southern peninsular India
	Madhavan B.L.; Krishnaveni A.S.; Ratnam M.V.; Ravikiran V.
发表日期	2021
ISSN	0169-8095
卷号	249
英文摘要	We present the long-term (2008–2018) climatological characteristics of column aerosol optical properties from the Sky Radiometer at Gadanki (13.48∘ N, 79.18∘ E), a typical rural site in southern peninsular India. A method to separate the fine and coarse mode spectral aerosol optical properties was presented. The climatological aspects related to the diurnal, monthly, and intra-annual variations of observed aerosol optical properties exhibited both seasonal and spectral dependence. While the size-resolved aerosol optical depth (AOD), absorption aerosol optical depth, and asymmetry parameter exhibited a decreasing trend, single scattering albedo (SSA) showed an increasing trend from shorter to longer wavelengths in all seasons with distinct magnitudes. Seasonal asymmetry in the diurnal variation of AOD and Angstrom exponent was observed. Intra-annual variability clearly indicated distinct fine and coarse mode dominance during winter and monsoon, respectively, while mixed contributions were found in other seasons. This is attributed to the influence of prevailing air masses on the column aerosol properties. Annual mean SSA values indicated the dominance of moderately absorbing (0.91) to weakly absorbing (0.95) aerosols. On evaluating the size-resolved AOD (at 500 nm) with those from extended Spectral Deconvolution Algorithm (SDA+), the observed differences are found to be remarkable for coarse mode AOD although the correlations for both fine and coarse AODs were observed to be 0.96. Lastly, the Dark Target and Deep Blue merged AOD (at 550 nm) from MODIS Terra/Aqua are evaluated to examine the consistency with ground measurements and both have shown a systematic underestimation with an increase in the magnitude of AOD strongly dependent on the seasons. These results form a basis for the comprehensive characterization of aerosol types and associated radiative impacts that are vital for understanding the regional climate change. © 2020 Elsevier B.V.
英文关键词	Aerosol Optical Depth; Asymmetry Parameter; MODIS Terra/Aqua AOD; SDA+; Single Scattering Albedo; Southern Peninsular India
语种	英语
scopus关键词	Aerosols; Climate change; Deconvolution; Radiometers; Supercomputers; Aerosol optical depths; Aerosol optical property; Asymmetry parameter; Intra-annual variability; Regional climate changes; Single scattering albedo; Spectral deconvolution; Spectral dependences; Optical properties; albedo; Aqua (satellite); climatology; MODIS; optical depth; particle size; rural atmosphere; Terra (satellite); India
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162158
作者单位	National Atmospheric Research Laboratory (NARL), Gadanki - 517 112, India
推荐引用方式 GB/T 7714	Madhavan B.L.,Krishnaveni A.S.,Ratnam M.V.,et al. Climatological aspects of size-resolved column aerosol optical properties over a rural site in the southern peninsular India[J],2021,249.
APA	Madhavan B.L.,Krishnaveni A.S.,Ratnam M.V.,&Ravikiran V..(2021).Climatological aspects of size-resolved column aerosol optical properties over a rural site in the southern peninsular India.Atmospheric Research,249.
MLA	Madhavan B.L.,et al."Climatological aspects of size-resolved column aerosol optical properties over a rural site in the southern peninsular India".Atmospheric Research 249(2021).