气候变化领域集成服务门户(CCPortal): Estimation of Aerosol Complex Refractive Index over a tropical atmosphere using a synergy of in-situ measurements

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DOI	10.1016/j.atmosres.2021.105625
	Estimation of Aerosol Complex Refractive Index over a tropical atmosphere using a synergy of in-situ measurements
	Nandan R.; Ratnam M.V.; Kiran V.R.; Madhavan B.L.; Naik D.N.
发表日期	2021
ISSN	0169-8095
卷号	257
英文摘要	Aerosol complex refractive index (ACRI) is a key micro-physical parameter used for modeling their radiative effects. In this study, an approach is developed to estimate the ACRI using a combination of surface-based measurements (2008–2015) from the Aerodynamic Particle Sizer (APS), the integrating Nephelometer, and the Aethalometer over a tropical rural location in the southern peninsular India. Around 98% of the real part of the estimated ACRI varied in the range of 1.3–1.8 while 99% of the imaginary part was found to vary in the range of 0.01–0.2 at 550 nm. The estimated imaginary parts are found to be high during pre-monsoon season suggesting the dominance of the increased absorption type aerosols. This is in line with the high concentration of black carbon aerosol observed during the pre-monsoon. The spectral variation of estimated ACRI is also studied and finally the significance of refractive index of surface aerosols in columnar properties is analysed by using the columnar single scattering albedo (SSA) and aerosol optical depth (AOD) observations from Sky radiometer. During winter season, the contribution to the total columnar scattering and absorption are mainly from surface or below the atmospheric boundary layer aerosols, whereas in monsoon season 80–90% contribution is from aerosols above. © 2021 Elsevier B.V.
英文关键词	Absorption; Aerosol; Complex Refractive Index; Scattering
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/236748
作者单位	National Atmospheric Research Laboratory, Gadanki, 517112, India; Indian Institute of Space Science and Technology, Thiruvananthapuram, 695 547, India
推荐引用方式 GB/T 7714	Nandan R.,Ratnam M.V.,Kiran V.R.,et al. Estimation of Aerosol Complex Refractive Index over a tropical atmosphere using a synergy of in-situ measurements[J],2021,257.
APA	Nandan R.,Ratnam M.V.,Kiran V.R.,Madhavan B.L.,&Naik D.N..(2021).Estimation of Aerosol Complex Refractive Index over a tropical atmosphere using a synergy of in-situ measurements.Atmospheric Research,257.
MLA	Nandan R.,et al."Estimation of Aerosol Complex Refractive Index over a tropical atmosphere using a synergy of in-situ measurements".Atmospheric Research 257(2021).