Tornadoes roll folk called “dragon sucking water” (tornado). That may be because its appearance resembles a dragon in a mythical story, bending down from the sky to suck up water from the ground.
It was actually like a large funnel, a cylindrical air column that spins violently. The upper part of the wind dragon is swept adjacent to the clouds; the lower part can be in the air, sometimes adjacent to the ground, called the dragon sucking the ground. If it is adjacent to the water, it is called the dragon that absorbs water. Clouds appear two rollers, both spinning and forward.
Tornadoes are very dangerous; the wind speed is usually from a few tens of meters to hundreds of m / s. It should be remembered that the level 12 wind is only 33 m / s. Hence the destructive power of the tornado wind was terrifyingly great. Once, a wind-blowing dragon attacked East Street, the military district, and California’s western suburbs. That time it swept away a 110-ton oil tank, as high as a three-or-four-story building, 15 meters high, and more than 120 meters away. Four floors high, a two-story dormitory was thoroughly destroyed.
The tornado range generally does not exceed 1 km. Its diameter is usually 25 – 100 m, and the length of the road is not more than 100 – 1000 m. It suddenly appeared, suddenly dissipated within minutes, not more than a few hours. Its shortest path is only 30 meters, and the longest is only a few hundred meters.
Are tornadoes formed like?
The cradle that spawns the tornado is below the thunderclouds. On the riverbank, fast-flowing water, you can see that when a log or a bridge is stopped, the speed of flow suddenly changes, the water swirls into a spiral. Likewise, a tornado is a spiral of air.
In fast-growing thunderclouds, the air is very turbulent; temperature, humidity, wind direction, and wind speed in it differ greatly, causing tornadoes. For example, when the downward airflow usually has a strong wind speed from level 8 or higher, and the rising wind speed is only level 3 – 4, it makes the air in the thundercloud become chaotic, producing eddy. When the eddy current develops to a certain extent, a tornado will form.
For example, when the upper and lower layers’ temperature has a big difference, such as in the ground, the temperature is above 20 ° C. In comparison, the temperature below the thundercloud drops to 10 ° C; at 4000 m, the temperature is 0 ° C.; at 8000 m is -30 ° C. At that time, the cold air flows rapidly downward; the hot air rises strongly, the air between the two upper floors and the lower and continuously turbulent will form many eddy currents, which is the condition forming a tornado.
So tornadoes often arise in the transition season from spring to summer or from summer to autumn and arise with strong thunderclouds.