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Author(s): Manas Kanti Deb, Mithlesh Mahilang, Jayant Nirmalkar

Email(s): mithleshkumarchem@gmail.com

Address: School of Studies in Chemistry
Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, 492010, India
Indian Institute of Science Education and Research, Bhauri, Bhopal, Madhya Pradesh, 462066, India.

Published In:   Volume - 30,      Issue - 1,     Year - 2017

ABSTRACT:
Size fractionated atmospheric aerosols were collected using cascade impactor sampler on quartz flter substrate during October 2015 to February 2016 in campus of Pt Ravishankar Shukla University of Raipur Chhattisgarh. The size of aerosol particles is of crucial importance to several processes in the atmosphere. The relative concentrations in both modes are responsible for the variability observed in the shape of the size distribution. Characteristic size distributions of measured aerosol over central India showed identifcation of three main behaviour types during entire study period: (i) month in which bimodal size distribution dominated in coarse mode (October 2015, 5 December 2015 and January, 2016), (ii) those months in which bimodal distribution equally intense in both one, and coarse modes (November, 2015) and (iii) those which were mainly dominated within fine (February, 2016, December, 2015). The two-subsequent month namely November 2015 and December 2015 shows bimodal size distribution with dominance in fine size range in comparison to coarse mode, possibly these high loading of one particles is due to long range transport. The peculiar observation of air trajectory shows that there is increase in fine particles concentration during December 2015, although there in increase in temperature and wind speed. The reason for this high concentration is long range transport of air masses. However, January has normal trend in particular matter concentration. The important finding of the present study based on characteristic size distribution and air trajectory plots accomplishes that fine particles are obtained through long range transport whereas coarse particles are mainly from local origin.

Cite this article:
Deb, Mahilang and Nirmalkar (2017). Regional and Transported A erosols in Ambient A tmosphere of Raipur,India, during W inter. Journal of Ravishankar University (Part-B: Science), 30(1), pp. 07-17.


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