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IJRSP Vol.39(2) [April 2010] >


Title:  Interannual variability in time scale characteristics of aerosol optical thickness over Mysore, India
Authors: Ganesh, K E
Umesh, T K
Narasimhamurthy, B
Keywords: Atmospheric aerosols
Aerosol optical thickness (AOT)
Precipitable water vapour
Issue Date: Apr-2010
Publisher: CSIR
PACS No.: 92.60.Mt
Abstract: The atmospheric measurements were carried out to collect data on aerosol optical thickness (AOT) and precipitable water vapour. A portable sunphotometer had been used to collect the required data. Analysis of the collected data shows a diurnal, monthly and seasonal variation in AOT and its correlation with rainfall. It was observed that AOT at shorter wavelength decreases at higher rate than at longer wavelength. The effects such as photosynthetic action and mixing layer phenomena contribute to the diurnal variation of AOT. Minimum and maximum average spectral AOTs differ with respect to month. Also in any aerosol year, AOTs are high during summer and increase over the years. The winter records lower AOT values as compared to summer. The consequences and causes for this type of variability in AOT characteristics have been presented in the paper.
Page(s): 80-91
ISSN: 0975-105X (Online); 0367-8393 (Print)
Source:IJRSP Vol.39(2) [April 2010]

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