• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2020, Volume: 13, Issue: 21, Pages: 2119-2137

Original Article

Spectral and seasonal variations of aerosol optical depth with special reference to Kanpur, Indo-Gangetic Basin

Received Date:23 April 2020, Accepted Date:14 June 2020, Published Date:23 June 2020


Objectives: To find characteristics of Aerosol optical depth (AOD) at ultraviolet (340-380 nm), visible (440-675 nm) and near-infrared (870-1020 nm) wavelength spectrum. During estimation of the radiative effect of aerosol in the atmosphere of earth radiation budget, it is important to study AOD. It is the total disappearance of sun rays due to aerosols in atmospheric column by absorption and scattering. Methodology: AOD is being measured using ground based sensor called CIMEL Sun photometer over Kanpur as it is situated in the Indo-Gangetic Basin. Findings: The seasonal variations in AOD as well as in various months of the year at 340nm, 500nm and 1020nm under all clear days have been studied. The observations showed that AOD was increasing from Pre-monsoon to Post-monsoon season at short wavelengths; whereas it was found to be decreasing at longer wavelengths regions. Novelty: Area under study is surrounded by small to large scale industries. Therefore, industrial emission is a major source of anthropogenic aerosols. The study of spectral and seasonal variations of Aerosol Optical Depth is important because the accumulation of aerosol particularly mixing state of aerosols has impact on atmospheric dynamics. Furthermore this work will also motivate the researchers to develop aerosol climatology map particularly for Indian regions.
Keywords: Aerosol optical depth (AOD); CIMEL sun photometer; solar radiations


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© 2020 Kumar, Kumar, Kumar, Guleria. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


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