Impact of amphan cyclone on environment modification

Abstract

The Amphan a Tropical super Cyclone (TC) had grown in the background of high Sea Surface Temperature of 320C-340 C, over the Bay of Bengal and in an artificially controlled pollution-free status of the Indian zone during the COVID-19 lockdown; thus providing an opportunity in examining the cyclone effects on the atmospheric dynamics in this special background. The paper presents the contributions of the Amphan wind to the atmosphere/environment of the North Eastern (NE) part of India along its track-path, after its landfall at 24.650N, 88.300E on May 20, 2020. The analysis supported by the troposphere temperature, relative humidity, precipitation, and suspended particles along with respective temporal and spatial profiles, finally offered that the Amphan-wind had brought down the temperature for a weeklong period, reduced the pollution level by 20% to 30% for more than a week but produced short-lived changes in humidity and precipitation over the NE-zone. The contribution of pollution is brought in to ambit of discussion to the weeklong sustenance of low temperature and in reducing the precipitation intensity when the growth environment of the CCN was artificially curtailed. The data sources are ground-based sensors, AWS, model profiles, and satellite observations.