Singh, B. P. and Srivastava, A. K. and Tiwari, S. and Singh, S. and Singh, R. K. and Bisht, D. S. and Lal, D. M. and Singh, A. K. and Mall, R. K. and Srivastava, Manoj K.
(2014)
Radiative Impact of Fireworks at a Tropical Indian Location: A Case Study.
Advances in Meteorology.
ISSN 1687-9309
Abstract
During Diwali festival, extensive burning of crackers and fireworks is made. Weeklong intensive observational campaign for aerosol study was carried out at a representative urban location in the eastern Indo-Gangetic Plain (IGP), Varanasi (25.3 degrees N, 83.0 degrees E), from October 29 to November 04, 2005 (Diwali on November 01, 2005), to investigate behavioral change of aerosol properties and radiative forcing between firework affected and nonaffected periods. Results show a substantial increase (similar to 27%) in aerosol optical depth, aerosol absorption coefficients, and aerosol scattering coefficients during affected period as compared to non-affected periods. Magnitudes of radiative forcing at top of atmosphere during affected and non-affected periods are found to be + 10 +/- 1 and + 12 + 1 Wm(-2), respectively, which are -31 + 7 and -17 + 5 Wm(-2), respectively, at surface. It suggests an additional cooling of similar to 20% at top of atmosphere, similar to 45% cooling at surface, and additional atmospheric heating of 0.23 Kday(-1) during fireworks affected period, which is similar to 30% higher than the non-affected period average.
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