Zusammenfassung der Ressource
Tropical storms
- What is a tropical storm?
- A tropical storm is a huge storm that develops in the Tropics.
- Tropical storms are incredibly powerful and can cause devastation to small islands and coastal regions.
- Where do tropical storms form?
- Tropical storms over warm oceans ( above 27'C ), which explains why they are found in the Tropics.
- They form in the summer and autumn when sea temperatures are at their highest.
- Most tropical storms form 5-15' north and south of the Equator. This is because at the Equator there is not enough 'spin' from the rotation of the Earth. A tropical storm is a spinning mass of clouds.
- The intense heat makes the air unstable causing it to rise rapidly.
- How do tropical storms form?
- 1. A strong upward movemnt of air draws water vapour up from the warm ocean surface.
- 2. This evaporated air cools as it rises and condenses to form towering thunderstorm clouds.
- 3. As the air condenses it releases heat which powers the storm and draws up more and more water from the ocean.
- 4. Several other thunderstorms join together to form a giant spinning storm. When the winds reach an average of 120km per hour the storm officially becomes a tropical storm.
- 5. On reaching land the storm's energy supply ( evaporated water ) is cut off. Friction with the land slows it down and it begins to weaken.