🔹 What is a Cyclone?
A cyclone is a low-pressure system where air moves towards the center and rises upward, creating stormy weather.
🔹 Formation of Cyclones
Cyclones form when:
- Warm ocean water heats the air
- Air rises → creates low pressure
- Surrounding air rushes in
- Rotation begins due to the Coriolis Effect
🔹 Types of Cyclones
1. Tropical Cyclones
- Form over warm oceans (temperature > 26°C)
- Strong winds, heavy rainfall
Examples (regional names):
- Cyclone (India Ocean)
- Hurricane (Atlantic Ocean)
- Typhoon (Pacific Ocean)
2. Temperate Cyclones (Extratropical)
- Form in mid-latitudes
- Caused by meeting of warm and cold air masses
🔹 Structure of a Cyclone
- Eye – Calm center
- Eyewall – Most violent winds
- Rainbands – Spiral bands of clouds
🔹 Characteristics of Cyclones
- Low pressure at center
- Inward spiraling winds
- Heavy rainfall and thunderstorms
- Strong wind speeds
🔹 Effects of Cyclones
⚠️ Negative Effects
- Floods
- Destruction of houses and crops
- Storm surges (sea water rise)
- Loss of life and property
🌟 Positive Effects
- Bring rainfall in dry regions
- Help maintain atmospheric balance
🔹 Cyclone Management
- Early warning systems
- Evacuation plans
- Coastal shelters
- Disaster preparedness
🌤️ ANTICYCLONES
🔹 What is an Anticyclone?
An anticyclone is a high-pressure system where air sinks and moves outward from the center.
🔹 Formation of Anticyclones
- Cooling of air → increases density
- Air sinks → creates high pressure
- Air moves outward from the center
🔹 Characteristics of Anticyclones
- High pressure at center
- Outward wind movement
- Clear skies and dry weather
- Light winds
🔹 Effects of Anticyclones
🌟 Positive Effects
- Pleasant weather
- Ideal for agriculture harvesting
- Clear skies for travel
⚠️ Negative Effects
- Can cause drought
- Fog and cold waves in winter
- Air pollution trapping
🔁 Difference Between Cyclones & Anticyclones
| Feature | Cyclone | Anticyclone |
|---|---|---|
| Pressure | Low pressure | High pressure |
| Wind Direction | Inward (towards center) | Outward (away from center) |
| Air Movement | Rising air | Sinking air |
| Weather | Cloudy, rainy, stormy | Clear, dry, calm |
| Wind Speed | Strong | Light |
🔹 Wind Direction (Important Concept)
- Northern Hemisphere:
- Cyclone → Anti-clockwise
- Anticyclone → Clockwise
👉 Due to the Coriolis Effect
- Cyclones bring intense weather and hazards, while anticyclones bring stable weather conditions.
- Both are important parts of the Earth’s atmospheric system.
- Understanding them helps in disaster management and weather forecasting.