Traditional Culture Encyclopedia - Weather forecast - What is the relationship between the value of contour line and air pressure?
What is the relationship between the value of contour line and air pressure?
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.
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