Articles online

Impact of Diwali Festival on Aerosol Optical Properties over an Urban City, Ahmedabad (India)

Category: Optical/Radiative Properties and Remote Sensing

Volume: 18 | Issue: 2 | Pages: 522-532
DOI: 10.4209/aaqr.2017.04.0124
PDF | RIS | BibTeX

Nisha Vaghmaria, Niyati Mevada, James Maliakal

  • Department of Physics of Physics, Electronics and Space Science, Gujarat University, Ahmedabad, 380009 Gujarat, India


Analysed changes in aerosol optical properties associated with Diwali fireworks.
AOD and β in the evening of following day of Diwali increased by about 165%.
Normal anti-correlation between α and β is not seen on following days of Diwali.
Spectral variation of AOD follows power law better during following days of Diwali.
Study suggests an increase in fine/accumulation mode particles due to Diwali.


An attempt has been made to investigate changes in the characteristics of aerosol optical properties induced during Diwali/ New Year celebrations of 2012 over an urban city, Ahmedabad (India). Ground based measurements of average Aerosol Optical Depth (AOD) were carried out using a Microtops-II at Physics Department, Gujarat University, Ahmedabad during 10th to 16th Nov, 2012. AOD on the day just after Diwali is found to increase significantly; around 75% compared to pre-Diwali days for visible wavelength, remained at higher level for one more day (next day of New Year). Turbidity factor (β) also changed considerably, to a high value of 0.34 on the next day of Diwali, indicating a significant increase in aerosol loading associated with Diwali/ New Year festivities. Normal anti-correlation between Angstrom exponent (α) and turbidity parameter (β) is not seen on days following Diwali. The AOD and β values in the evening of the next day of Diwali increased to about 164% and 171% respectively compared to pre-Diwali days evenings; such an increase associated with the festivities has not been reported at any part of the country. Spectral variation of AOD also shows a significant change in the pattern during following two days of celebrations compared to pre-Diwali days. It is seen to follow power law more closely. Significant increase in AOD and change in spectral pattern suggest an increase of fine/accumulation mode particles due to Diwali/ New Year festivities.


Optical properties of aerosol Aerosol Optical Depth (AOD) Angstrom parameters Anthropogenic aerosol Aerosol physics

Related Article

Characteristics of Classified Aerosol Types in South Korea during the MAPS-Seoul Campaign

Seoyoung Lee, Jaemin Hong, Yeseul Cho, Myungje Choi, Jhoon Kim, Sang Seo Park, Joon-Young Ahn, Sang-Kyun Kim, Kyung-Jung Moon, Thomas F. Eck, Brent N. Holben, Ja-Ho Koo
Accepted Manuscripts
DOI: 10.4209/aaqr.2017.11.0474

Impacts of Aerosols on the Retreat of the Sierra Nevada Glaciers in California

Hesham El-Askary , Jingjing Li, Wenzhao Li, Thomas Piechota, Tommy Ta, Ariane Jong, Xinyi Zhang, Tiantian Yang
Volume: 18 | Issue: 5 | Pages: 1317-1330
DOI: 10.4209/aaqr.2018.03.0089

Effects of Wintertime Polluted Aerosol on Clouds over the Yangtze River Delta: Case Study

Chen Xu, Junyan Duan, Yanyu Wang, Mei Li, Tiantao Cheng , Hua Wang , Hailin Zhu, Xin Xie, Yuehui Liu, Yan Ling, Xiang Li, Lingdong Kong, Qianshan He, Hongli Wang, Renjian Zhang