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Advances in Meteorology
Volume 2015, Article ID 517434, 11 pages
Research Article

Optical and Radiative Properties of Aerosols over Two Locations in the North-West Part of India during Premonsoon Season

1Indian Institute of Remote Sensing, ISRO, Department of Space, Government of India, Dehradun, India
2Physics Department, Punjabi University, Patiala, India

Received 5 March 2014; Revised 23 June 2014; Accepted 7 August 2014

Academic Editor: Umesh C. Dumka

Copyright © 2015 Yogesh Kant et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present study examines the aerosol characteristics over two locations in the northwest region of India (Dehradun and Patiala) during premonsoon season of 2013. The average mass concentrations of particulates (PM10; PM2.5; PM1) were found to be , , and µgm−3 and , , and µgm−3 over Dehradun and Patiala, respectively. The average aerosol optical depth () is observed to be over Dehradun and over Patiala. Ångström exponent and fine mode fraction show higher values over Dehradun as compared to Patiala. The average mass concentration of black carbon was found to be ngm−3 and ngm−3 over Dehradun and Patiala, respectively. The diurnal pattern of BC is mainly controlled by boundary layer dynamics and local anthropogenic activities over both the stations. The average single scattering albedo () exhibited low value over Patiala () in comparison to Dehradun (), suggesting the abundance of absorbing type aerosols over Patiala. The average atmospheric aerosol radiative forcing is +37.34 Wm−2 and +54.81 Wm−2 over Dehradun and Patiala, respectively, leading to atmospheric heating rate of 1.0 K day−1 over Dehradun and 1.5 K day−1 over Patiala.