OPEN ACCESS

Articles online

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

Category: Optical/Radiative Properties and Remote Sensing

Article In Press
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

Highlights

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.


Abstract

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.

Keywords

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


Related Article

Effects of Carbon Dioxide Addition on the Soot Particle Sizes in an Ethylene/Air Flame

Linghong Chen, Jianwu Zhou, Xianjue Zheng, Jian Wu, Xuecheng Wu , Xiang Gao, Gérard Gréhan, Kefa Cen
Volume: 17 | Issue: 10 | Pages: 2522-2532
DOI: 10.4209/aaqr.2017.08.0271
PDF

Thirteen Years of Aerosol Radiative Forcing in Southwestern Iberian Peninsula

Maria A. Obregón , Maria J. Costa, Ana M. Silva, Antonio Serrano
Volume: 17 | Issue: 10 | Pages: 2509-2521
DOI: 10.4209/aaqr.2017.05.0159
PDF

Particle Size Distribution of Soot from a Laminar/Diffusion Flame

Jian Wu, Linghong Chen , Jianwu Zhou, Xuecheng Wu, Xiang Gao, Gérard Gréhan, Kefa Cen
Volume: 17 | Issue: 8 | Pages: 2095-2109
DOI: 10.4209/aaqr.2017.06.0216
PDF

Dynamic Monitoring of the Strong Sandstorm Migration in Northern and Northwestern China via Satellite Data

Qinghua Su, Lin Sun , Yikun Yang, Xueying Zhou, Ruibo Li, Shangfeng Jia
Article In Press
DOI: 10.4209/aaqr.2016.12.0600
PDF
;