What is a typhoon?
Concepts and Causes of Typhoons
Since the Earth is spherical, the amount of solar radiation reaching the Earth is lower
at the high level, resulting in an energy imbalance. Due to the high altitude of the sun, convective clouds are created in the sea near the equator, where a lot of energy has been accumulated. Sometimes these convective clouds gather and develop into a huge low-pressure system, which is called a typhoon. The typhoon receives water vapor evaporated from the sea and moves to a high altitude by forward force while maintaining its strength. Through this process, typhoons play a role in resolving
the energy imbalance between the Earth's north and south.
Classification of Typhoon Strength
Classification of Typhoon Size
The size of typhoons was classified based on the strong wind radius, but due to the improvement of the typhoon information service, it was provided as the strong wind radius and storm radius information instead of the size classification after May 15, 2020.
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- Wind radius: Radius of wind with a wind speed of 15 m/s or more from the center of the typhoon (km)
- Storm radius: radius of wind above 25 m/s from the center of the typhoon (km)
Decline of a Typhoon
Typhoons transform or dissipate into a temperate low pressure in the following two cases.
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1. A typhoon moves into the ocean where it cannot supply warm and humid tropical air.
: energy source depletion.
2. A typhoon moves to land. : depletion of energy sources, weakening kinetic energy
due to friction with the surface