Why is there no typhoon on the equator?
Typhoon 形成需要26.5℃以上暖海水, 足够的Turn toward power., Vertical wind shift.等条件. 赤道因没有偏 toward 力, 反而无法形成Typhoon .
The Four Conditions of Typhoon
- The warm face.: Temperature above sea level ≥26.5°C, and the warm water layer should be sufficiently thick (about 50 meters) .
- Turn toward power.: It is generated by the earth's rotation, so that the disruptive air flow rotates.The higher the latitude toward the stronger, the equator is zero.
- Vertical wind shift.High and low wind speedwind direction difference is small, the heat can be concentrated in the vertical direction, the tower-shaped flow is not cut ".
- Initial disturbance: A seed" is needed, such as a disturbing cloud cluster of E wind waves, tropical radiation bands.
Why there is no typhoon on the equator?
The equatorial sea is the warmest.Turn toward to zero.—— The air flow can only flow straight toward the low-pressure center to fill it, and can not rotate into a turbine. so typhoon is almost all formed at 5° out of slat, the most active area is lat 10°-20°.
Northwest Pacific Typhoon
There are an average of about 80 tropical cyclones per year in the world, with Northwest Pacific alone accounting for about one-third (26-28 cyclones per year on average).
- With the world's largest hot water area (" hot pool"), the sea temperature is over 28°C per year
- 副热带高压S侧的E风波, 季风槽提供大量Initial disturbance
- Large ocean area gives Typhon full development space
This is why China, the Philippines, and Japan are the countries worldwide most affected by Typhoon.
How powerful is a typhoon?
一个成熟Typhoon 每天释放的能量相当 at 数千颗广岛原子弹, 主要来自水汽凝结释放的潜热. 这也解释了为什么Typhoon Landfall后会迅速减弱——离开The warm face., "燃料"就断供了, 加上陆地摩擦消耗, 通常Landfall后1-2天内就衰减为低压.