Which of the following is/are the favourable conditions for the format...
In News- Recently typhoon Goni (locally called Rolly) made landfall in the eastern Philippines.
All the conditions are correct: Tropical cyclones are violent storms that originate over oceans in tropical areas and move over to the coastal areas bringing about large scale destruction due to violent winds (squalls), very heavy rainfall (torrential rainfall) and storm surge.
They are irregular wind movements involving the closed circulation of air around a low-pressure center. This closed air circulation (whirling motion) is a result of rapid upward movement of the hot air which is subjected to Coriolis force. The low pressure at the centre is responsible for the wind speeds.
- Favourable conditions for the formation of cyclones:
- A large and calm sea surface with a temperature higher than 27° C.
- Presence of the Coriolis force and a distance from the Equator is necessary.
- Small differences in the vertical wind speed.
- A pre-existing weak- low-pressure area or low-level-cyclonic circulation
- Upper divergence above the sea level system. Presence of anticyclonic circulation at the height of 9 to 15km above the surface.
Which of the following is/are the favourable conditions for the format...
Favourable Conditions for the Formation of Cyclones:
Cyclones are large-scale weather systems characterized by low atmospheric pressure at the center and strong winds circulating around it. They typically form over warm ocean waters near the equator and can cause significant damage and destruction when they make landfall. The formation of cyclones is influenced by several factors, and the favourable conditions for their formation are as follows:
1. Presence of the Coriolis force:
The Coriolis force is an apparent force that acts on moving objects due to the rotation of the Earth. It causes the deflection of moving air and water masses to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. The Coriolis force is essential for the formation and development of cyclones as it provides the necessary rotation for the system. Without the Coriolis force, cyclones would not be able to develop their characteristic rotation. Therefore, the presence of the Coriolis force is a crucial factor for the formation of cyclones.
2. Warm sea surface:
Cyclones draw their energy from the warm sea surface, specifically from the heat and moisture content of the ocean. The warm sea surface provides the necessary fuel for the cyclone to intensify and maintain its strength. As the warm air rises from the ocean surface, it creates low pressure at the center, which in turn draws in more warm air from the surrounding areas. This process creates a continuous supply of warm, moist air that fuels the cyclone's growth. Therefore, a calm and warm sea surface is another favourable condition for the formation of cyclones.
3. High temperature:
High atmospheric temperatures contribute to the formation of cyclones by creating a conducive environment for the development of thunderstorms. Thunderstorms are often the initial stage in the formation of cyclones, and they require warm, moist air to form. High temperatures provide the necessary energy to fuel the convective activity in the atmosphere, leading to the formation of thunderstorms. These thunderstorms can then evolve into cyclones under the right conditions. Therefore, high temperatures are also favourable for the formation of cyclones.
In conclusion, the formation of cyclones requires the presence of the Coriolis force, a calm and warm sea surface, and high temperatures. These factors work together to create the necessary conditions for the development and intensification of cyclones.