SARS-CoV-2 pandemic lockdown: Effects on air quality in the industrialized Gujarat state of India.

摘要: Two weeks after the world health organization described novel coronavirus (SARS-CoV-2) outbreak as pandemic, Indian government implemented lockdown of industrial activities and traffic flows across entire nation between March 24 May 31, 2020. In this paper, we estimated improvements achieved in air quality during period (March 24, 2020 April 20, 2020) compared to pre-lockdown (January 1, 23, by analyzing PM2.5, PM10, SO2, CO, NO2 O3 data from nine different monitoring stations distributed four zones industrialized Gujarat state western Indian. The Central Pollution Control Board (CPCB)-Air Quality Index (AQI) illustrated better qualities with higher 2 (Ahmedabad Gandhinagar) 3 (Jamnagar Rajkot), moderate 1 (Surat, Ankleshwar Vadodra) 4 (Bhuj Palanpur). concentrations were reduced 38-78%, 32-80% 30-84%, respectively. Functioning power plants possibly led less reduction CO (3-55%) declined emission NO helped improve (16-48%) contents. We observed an overall improvement 58% AQI for first months same interval previous year. This positive outcome resulted restrictions might help modify existing environmental policies region.