Pollutions to get accumulate and stagnant at the boundary layer on a normal day.however,interesting fig.7(b) shows a tinge of signature of the persisting change in lapse rate, occurred due to the accumulation of atmospheric pollutions in the festival a week ago. Fig.8shows the variation of diurnal surface maximum air temperature during pre-Deepawali,Deepawali and post-Deepawali day (November 12-14,2012.the following three days after the festival(November 14-17,2012)and seven days before and after the commencement of Deepawali festival;both has been treated as normal days (November 04,2012and November 21,2012).It is found that there has been an increase in surface maximum air temperature (about 8-10 K increase) on the Deepawali days compared to normal days.fig.9(a)and(b)indicates a gradual in-crease of heat content in the atmosphere,during this period.It is due to the absorption of heat by the pollutant particulates emitting from firecrackers and sparkers.The emitted air particulates and gaseous pollutants absorb heat and helps in the entrapment of pollutant particles within the boundary layer.Table 4 represents the average atmospheric heat-content or enthalpy and CBH during the festival period and normal days for both 2012 and 2013.This has also a direct consequence on the vertical profile of the temperature in the persistence of Chang in lapse rate for the days beyond the Deepawali festival.similar results were also obtained for the respective Deepawali periods for year 2013.