What is the relationship between the value of contour line and air pressure?

There is no relationship between the value of contour line and air pressure, but the relationship between the value of contour line and air pressure is as follows:

① Arrangement and value of isobars:

Low pressure center-similar to the basin in the contour map (the updraft is at the center)

High pressure center-similar to the peak in the contour map (the center is flowing downwards).

High pressure ridge-similar to the ridge (ridge line) in contour map.

Low pressure trough-similar to the valley (trough line) in contour map.

② Isobar density: (determines wind power)

Dense isobar-large pressure gradient force-large wind force.

Sparse isobar-small pressure gradient force-small wind force

③ Determine the wind direction (any point) and weather conditions on the isobar diagram:

Judging the law of wind direction: first, make clear the level of air pressure; Secondly, determine the direction of pressure gradient force; Finally, draw the deviant wind according to the northern and southern hemispheres.

Weather: refers to the material state of the atmosphere in a short time, including temperature, humidity, wind direction, air pressure and other indicators.

1. The wind blows from high latitude to low latitude-cold and dry.

B, the wind blowing from low latitude to high latitude-warm and humid.

C. Low-pressure transit and rainy weather; What a sunny day it is to cross the border at high pressure.