We know where the wind is when something

Introduction? The Wind Speed ​​Song is a Chinese poem that describes the speed level of the wind. The poem rhymes and is pleasant to read. Through the Wind Speed ​​Song, you can know the approximate wind speed from level 0 to level 12.

"Song of the Speed ​​of Wind"

In level 0 wind, the smoke goes straight up; in level 1 wind, the smoke is slightly deflected;

In level 2 wind, the leaves rustle; in level 3 wind , the flag flutters;

The wind of level 4 makes dust rise; the wind of level 5 makes waves;

The wind of level 6 makes the big trees shake; the wind of level 7 makes it difficult to travel;

Wind level 8, branches will be broken; wind level 9, chimneys will collapse;

Wind level 10, tree roots will be uprooted; wind level 11, land rare;

Wind level 12 , less often, the wind roars and the waves surge into the sky.

"Wind Speed ​​Song" 2

Level 0 windless smoke; Level 1 soft wind smoke slightly slanted;

Level 2 light wind and the sound of leaves; Level 3 The branches swayed in the breeze;

The gentle breeze of Level 4 stirred up dust; the clear wind of Level 5 made waves;

The strong wind of Level 6 shook the trees; the strong wind of Level 7 made it difficult to walk;

< p>Strong winds of level 8 broke branches; strong winds of level 9 destroyed chimneys;

Winds of level 10 uprooted trees; storms of level 11 are rare;

Cyclones of level 12 have huge waves.

Wind speed (m/s)

0 - - Calm smoke goes straight up 0.0~0.2 0

1 0.1 0.1 Microwave smoke can indicate the wind direction, and the leaves are slightly There is shaking 0.3~1.5 1

2 0.2 0.3 There are small ripples, the fishing boat shakes and people feel the wind, the leaves rustle slightly, the flag starts to flutter, and the tall grass and crops start to shake 1.6~3.3 2

3 0.6 1.0 There are small waves, the fishing boats gradually feel the shaking of leaves and twigs, the flags are spread out, and the tall grass and crops are swaying 3.4~5.4 4

4 1.0 1.5 Wave top There is some white foam. When the fishing boat is full sail, the hull can be tilted to one side, which can blow up dust and paper on the ground, branches sway, and tall grass and crops are undulating. 5.5~7.9 7

5 2.0 2.5 Waves There are more white foams on the top. The fishing boat has retracted part of its sail and the leaves and twigs are swaying. There are small waves on the inland water surface. The tall grass and crops have obvious undulations. 8.0~10.7 9

6 3.0 4.0 The white foam begins. The fishing boat was blown off the top of the waves, the sails of the fishing boat were reduced, most of the big branches were swaying, the wires whirred, it was difficult to hold an umbrella, and tall grass and crops fell to the ground from time to time 10.8~13.8 12

7 4.0 5.5 White The foam leaves the top of the wave and is blown into stripes. The whole tree shakes, and the big branches bend down. It is inconvenient to walk in the wind. 13.9～17.1 16

8 5.5 7.5 The white foam is blown into obvious stripes and small branches are broken. , people feel strong resistance when moving forward into the wind 17.2~20.7 19

9 7.0 10.0 The waves blown by the wind reduce the horizontal visibility, making it difficult for motor boats and sailing boats to sail. The thatched houses were damaged, roof tiles were lifted, and big branches were lifted. Can be broken 20.8～24.4 23

10 9.0 12.5 The waves blown by the wind significantly reduce the horizontal visibility, which is very dangerous for sailing and sailing. Trees can be blown down and general buildings can be damaged 24.5～28.4 26

11 11.5 16.0 The waves blown by the wind significantly reduce the horizontal visibility. It is extremely dangerous for motorboats and sailing boats to encounter large trees, which can be blown away. General buildings are seriously damaged 28.5~32.6 31

12 14.0 - Roaring waves are rare on land, and their destructive power is extremely high >32.6 >31

In fact, in nature, the wind force sometimes exceeds level 12. For example, the wind force at the center of a strong typhoon or a tornado may be much stronger than level 12. However, strong winds above level 12 are relatively rare, and generally the level is not specified.

Extended information:

Wind is a natural phenomenon caused by air flow, which is caused by solar radiation heat. Sunlight shines on the surface of the earth, causing the surface temperature to rise. The air on the surface expands due to heat and becomes lighter and rises.

After the hot air rises, the low-temperature cold air flows in laterally. The rising air gradually cools and becomes heavier and falls. Because the higher surface temperature will heat the air and cause it to rise, this flow of air occurs. The wind blew.

From a scientific point of view, wind often refers to the horizontal motion component of the air, including direction and magnitude, that is, wind direction and wind speed; but for flight, it also includes the vertical motion component, the so-called vertical or lift airflow. Strong winds can move objects and the direction of objects (mass of matter). The wind is moving very fast.

Baidu Encyclopedia - Wind Speed ​​Song

Baidu Encyclopedia - Wind