The super cyclone, Amphan, is the strongest storm ever recorded as of Monday night in the Bay of Bengal. The cyclone is said to hit the Indo-Bangladesh border and is extremely dangerous for the millions of people who reside there. Evacuation of the people who are at immediate danger is being carried out, but difficulties are being faced due to the possibility of spread of the COVID19 pandemic in that area. The storm, currently near Odisha, is strong enough to uproot trees and draw in winds at the speed of 155 to 165 kph (96 to 103 mph) with gusts of 185 kph (115 mph).
Cyclones are a system of winds rapidly rotating inwards to an area of low barometric pressure. They spin in a clockwise direction in the northern hemisphere and anti-clockwise direction in the southern hemisphere. A super cyclone is an extremely severe cyclonic storm with speeds greater than 221 km/h. They form over large bodies of warm water, deriving their energy from water evaporation from the surface of the ocean. This water recondenses into clouds and rain when moist air rises and cools to saturation.
Climate change is making tropical cyclones more intense with stronger maximum sustained winds, according to a new study led by scientists at NOAA and the University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies (CIMSS), who analysed nearly 40 years of enhanced infrared satellite imagery.
This study, published Monday in the Proceedings of the National Academy of Sciences (PNAS), found a significant increase in tropical cyclone intensity across the globe over the period from 1979 to 2017.