Hyderabad: A study conducted by researchers from University of Hyderabad (UoH) has indicated the rise in hazy days over Central India every year. The study said the hazy days over Central India were increasing because of relatively higher increase in biomass burning over the region.
The study is significant in the backdrop of the rising concerns over health issues and climatic impacts due to decline in air quality over Northern plains of India. The study said Central India had a much higher increase in the number of polluted days during winter season in recent years.
The team of researchers, including Dr Vijay Kanawade along with his Ph D student, Abin Thomas from Centre for Earth, Ocean, and Atmospheric Sciences (CEOAS), University of Hyderabad (UoH) and Dr Chandan Sarangi from Pacific Northwest National Laboratory, USA, found out that the days with high aerosol loading i.e. hazy days were increasing at a rate of 2.6 days per year.
The researchers in the study, which involved using 15 years of satellite and model analysis data sets over India and adjoining seas to examine the trends in number of days with low to high aerosol loading during the winter season.
The UoH study said that aerosol loading or hazy days over India and adjoining seas had been rapidly increasing in the recent years. The researchers in the paper observed Indian subcontinent was vulnerable to particulate pollution because of rapid urbanisation and population.
“The winter time hazy scenarios and their radiation feedbacks exert a profound impact on the weather and climate. Using 15 years i.e. between 2003 and 2017 of satellite and reanalysis data sets, our study has investigated the trend in the number of hazy days i.e. days with high aerosol loading,” the researchers said.
The study said that although high aerosol loading was observed over Indo-Gangetic plains, including northern parts of the country, the hazy days over the Central India also had escalated greatly in the recent years. “Thus, our findings provide new insights to better constrain aerosols role in the climate over Indian subcontinent,” the researchers added.