Rainwater pressure range

When it rains, the air pressure is very low. Due to the different precipitation systems in different seasons and regions, the pressure of each precipitation is also different. In general, the ground air pressure is 10 13 hectopascals, so when it rains, the air pressure is less than 10 13 hectopascals, and more than 200 hectopascals (the central air pressure of the strongest tornado known at present is also the lowest air pressure measured on the earth).

It will rain when there is a low-pressure system, because the low-pressure system means that the air pressure near the ground is low, because the air moves vertically upward from the ground at that time, and the water vapor in the air condenses when it reaches high altitude in the process of upward movement.

The weather controlled by the high-pressure system is sunny, because the air pressure near the ground is high, that is to say, in the vertical direction, the air mainly moves vertically downward. The closer to the ground, the higher the temperature, and the more difficult it is for water vapor in the air to cool and condense to form precipitation. So it's sunny. Just like our usual autumn weather, it is controlled by high-pressure system many times.

Extended data:

The seasonal movement of the wind belt in the pressure belt refers to the latitude difference of solar radiation and the influence of the earth's rotation. The global atmospheric circulation is regularly distributed, and different circulation situations are distributed at different latitudes, that is, under the control of different pressure belts and wind belts. Formation factors of monsoon circulation: land and sea distribution of pressure zone and seasonal movement of wind zone.

Seasonal movement law of pressure zone and wind zone;

1, moving north in summer and south in winter.

2. The movement is about 1 month later than the direct sun point.

3. The annual range of motion is about 10.

Causes of seasonal movement of pressure zone and wind zone;

The regression motion of the direct point of the sun and the existence of the angle of intersection between the yellow and the red (that is, the inclination of the earth axis remains unchanged)