Who can say something about the wind speed in the troposphere? It is better to have detailed data. Thank you!

Classification: Education/Science >> Science and Technology

Analysis:

For this data, we must first understand where the troposphere is on the earth.

troposphere

troposphere

Located at the bottom of the atmosphere, it concentrates about 75% of air quality and more than 90% of water vapor quality. Its lower boundary is connected with the ground, and its upper boundary height varies with geographical latitude and season. The average height is low latitude 17 ~ 18km, middle latitude 10 ~ 12km, and the polar regions are 8 ~ 9km. Summer is higher than winter.

In the troposphere, the temperature decreases with the elevation, with an average increase of 100 m, and the temperature decreases by about 0.65℃. Due to the great influence of the surface, the horizontal distribution of meteorological elements (temperature, humidity, etc.). ) uneven. The regular vertical movement of air and the irregular turbulence are quite intense. The water vapor, dust and heat in the upper and lower layers are exchanged and mixed. Because more than 90% of water vapor is concentrated in the troposphere, many weather phenomena such as clouds, fog, rain and snow occur in the troposphere.

The troposphere, from the ground to 1 ~ 2km, is greatly affected by the ground fluctuation, and it is wet, dry, cold and warm, which is called the friction layer (or atmospheric boundary layer). Above the friction layer is less affected by the ground conditions, which is called free atmosphere. There is a transition layer between the troposphere and the stratosphere above it, called the tropopause, which is about several hundred meters to 2 kilometers thick. The temperature near the tropopause changes suddenly with height, or decreases with height, or remains unchanged with height, or increases slightly with height. It has a strong blocking effect on vertical movement.

To sum up, that is to say, the wind speed in the troposphere does not have a constant value.

Accordingly, it is divided into

No wind

Quiet, straight.

0.0—0.2

1

cold-caused ailment

Smoke can indicate the wind direction, and the leaves tremble slightly.

0.3— 1.5

1

2

light breeze

People's faces felt the wind, leaves made a slight noise, flags began to flutter, and tall grass began to tremble.

1.6—3.3

2

three

gentle breeze

Leaves and branches are shaking, flags are flying and tall grass is shaking.

3.4—5.4

four

four

Hefeng

It can blow up the dust and paper on the ground, the branches shake and the tall grass fluctuates.

5.5—7.9

seven

five

fresh breeze

Small trees with swaying leaves have small waves on the inland water surface, and the tall grass waves fluctuate obviously.

8.0— 10.7

nine

six

gale

Branches are shaking, wires are whirring, it is difficult to hold an umbrella, and tall grass falls to the ground from time to time.

10.8— 13.8

12

seven

A sudden wind

The whole tree wobbles and the branches bend, making it inconvenient to walk in the wind.

13.9— 17. 1

16

eight

Dafeng

It can break twigs, and people will feel great resistance when they move forward in the wind.

17.2—20.7

19

nine

fierce/wild/violent wind

The straw house was damaged, the roof tiles were torn off and the branches could be broken.

20.8—24.4

23

10

fierce/wild/violent wind

Trees will be blown down and ordinary buildings will be damaged.

24.5—28.4

26

1 1

storm wind

Trees can be blown down and ordinary buildings are seriously damaged.

28.5—32.6

3 1

12

Jufeng

It is rare on land and has great destructive power.

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